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The Critical Role of Bearings in Drones and UAVs

The Rise of UAVs and Drones

We have always heard – bearings are a vital component of industrial machinery, motors, and engines, utilised to minimise friction and allow for smooth rotation. While this is true, bearings are far more important, and the application of these crucial components is just not limited to machines. In reality, bearings are essential to nearly every moving system, from heavy industrial machines to precision surgical robots. Their role goes beyond just reducing friction; they support motion, precision, reliability, and efficiency, making them a vital part of traditional and emerging technologies. Talking about emerging technologies, bearings are now widely being used in medical devices, renewable energy, robotics & automation, and more. One such emerging area where bearings are playing a role is drones and UAVs.

The Rise of UAVs and Drones

The Rise of UAVs and Drones

Drones and UAVs are being used extensively, from being used in the military to being used in industries like logistics, agriculture, surveillance, filmmaking, disaster management, and more. According to a report by Statista, the revenue in the drone market worldwide amounts to US$4.4bn in 2025. Now, these drones and UAVs, in order to function efficiently, require high-precision bearings that can withstand high rotational speed, rapid directional change, vibrations, and harsh conditions, increasing the demand for precision bearings.

Sector

Use of Drones

Agriculture

Utilised in crop monitoring, spraying & soil analysis.

Logistics

Aids with parcel drops & last-mile deliveries.

Defence & Surveillance

Utilised in tactical operations, patrolling, etc. 

Media & Filmmaking

Needed for cinematography, aerial photography, etc. 

Disaster Response

Aids supply drops, aerial assessment, etc. 

Role of Bearings in Drones & UAVs

Bearing has an important part to play in drones & UAV systems for proper and smooth working. Drone motors and control systems are generally equipped with bearings. Bearings have an important part to play in this system, including:

  • Smooth Motor Movement: The main function of a bearing is to enable effective power delivery. Drones & UAVs are typically equipped with brushless motors, and bearings are an integral part of these motors. Bearings assist the rotor to rotate smoothly, reducing vibration, and wobble.
  • Precision Movement: Drones and UAVs are fitted with control systems that manage the movements of these appliances. Bearings are an essential part of the control system, ensuring precise and responsive movement, allowing the drone to manoeuvre accurately.
  • Minimise Vibration & Noise: Precision-made bearings reduce vibration & friction-related noise resulting in quiet operation and help maintain the accuracy of its flight.
  • Durability: Drones operate at extreme high-speed and at harsh conditions. Bearings fitted in drones and UAVs are built to handle extreme rotation and dampen vibration, enhancing motor’s efficiency and reducing the chances of failure.

Types of Bearings Used in Drones and UAVs

Types of Bearings Used in Drones and UAVs
  • Ball Bearing: Ball bearing is most commonly utilised in drone’s & UAVs motors, propellers, and gimbals. Ball bearing plays an important part in supporting the axial and radial load facilitating smooth rotation of moving components. Motor in drones and UAVs spin at extremely high speed producing friction and heat, ball bearing minimises friction and heat and promotes smooth & efficient operation.
  • Roller Bearing: Roller bearings, such as tapered roller bearings and cylindrical roller bearings, are mostly utilised in drones, particularly drones designed for maximum heavy radial load capacity. Drones used in cargo delivery, spraying for agriculture, or military operations incorporate roller bearings owing to their maximum load capacity.
  • Ceramic Bearing: Ceramic bearings are preferred type for drones with high-performance motors, racing drones, and drones operating in harsh conditions. Ceramic bearings offer good resistance to heat, corrosion, and wear.
  • Thrust Bearing: Thrust bearings are used in drone & UAVs systems to support axial loads. Thrust bearing manages stability and premature wear of components.
  • Angular Contact Bearing: Angular contact bearing is used to handle both radial and axial loads. These bearings are designed to provide better load handling & stability. Angular contact bearings are used in high-speed and heavy lift drones.

Drone Components Where Bearings Are Used

Bearings are vital parts of drone systems and are employed in numerous parts, such as:

  • Drone Motors: Motors in drones are equipped with bearings, commonly ball bearings. Bearings in motors bear the drone rotor, reduce friction, and facilitate smooth rotation of components.
  • Rotors & Propellers: Bearings are installed in propeller assemblies to facilitate even and stable rotation of the propeller.
  • Camera Gimbals: Bearings are installed in camera gimbals, mainly miniature or precision bearings, allowing smooth movement of the camera.
  • Payload Mechanism: Drones designed to carry heavy loads are fitted with bearings to help in the controlled release or transport of goods.
  • Landing Gear: Bearings in landing gears are used to cater for loads during takeoff and landing.

Industry Applications of Bearings in Drones

Industry Applications of Bearings in Drones
  • Agriculture: Drones are now being used widely in the agriculture field, specifically for spraying, crop monitoring, field mapping, soil analysis, and more. Bearings are used in motor systems of these drones and built to resist dust and moisture.
  • Surveillance & Defence: Drones and UAVs are emerging as a key component of defence, serving a vital function in intelligence gathering, surveillance, reconnaissance, precision strikes and so forth. Bearings employed in these drones & UAVs are extremely robust and are made to function in harsh conditions.
  • Filmmaking & Media: Drones deployed in media & filmmaking are fitted with precision bearings to provide smooth, shake-free camera movement. Bearings employed here are designed to dampen operation noise.
  • Logistics & Delivery: Drone are now an integral part of the logistics and delivery industry. Bearings in these drones are designed to endure safe flight operation for accurate parcel drops.
  • Infrastructure: Drones used in detailed visual inspection of infractures are fitted with bearings responsible for stable flight around structures like bridges and towers.

Selection of the Right Bearings for Drone Application

  • Application: Choose bearing based on the drone type & operating conditions.
  • Load & Speed Requirements: Ascertained load & speed requirements before choosing a bearing as it must support high RPMs & handle axial or radial loads.
  • Material Selection: Bearing material must be chosen based on requirement, ex: ceramic bearings are lightweight, stainless bearings are corrosion resistant.
  • Precision & Low Friction: Bearing should be chosen based on precision requirements, high precision drones require high-precision bearings.
  • Shock & Vibration Resistance: Bearings must be chosen to absorb mechanical shocks from take-off, landing, and during operation.
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Press Release

NBC Bearings reinforces sustainability leadership by publishing Environmental Product Declarations for its range of bearings

~ NBC becomes the first Indian bearing manufacturers to issue EPDs, strengthening its commitment to transparency and global ESG standards ~

Jaipur, 3rd June 2025 – National Engineering Industries Ltd. (NEI), manufacturer of the NBC brand of bearings and part of the The CKA Birla Group, an Indian multinational conglomerate with a multibillion-dollar revenue, has announced the successful publication of Environmental Product Declarations (EPDs) for eight different types of bearings.

An Environmental Product Declaration (EPD) is an independently verified and standardized document that transparently reports a product’s environmental impact throughout its life cycle—from raw material extraction to manufacturing, usage, and end-of-life disposal. NBC’s EPDs follow globally accepted protocols, including ISO 14025 and EN 15804, and are registered with the International EPD® System.

This initiative is a key milestone in NBC’s ongoing efforts to embed sustainability across the value chain and support global customers in meeting their ESG and Scope 3 reporting requirements. With these EPDs, NBC Bearings joins a select group of global bearing manufacturers to offer verified life cycle data for their products.

Rohit Saboo, President & CEO, NEI, said, “We believe that true sustainability begins with transparency. By publishing EPDs for our bearings, we are empowering our customers with credible data to make responsible choices and reduce their carbon footprint. This initiative not only strengthens NBC’s position as a responsible engineering partner but also prepares us to participate in green supply chains across the world.”

These declarations are not just tools for transparency — they also serve as a roadmap for internal product and process improvements, helping identify high-impact materials, reduce waste, optimize energy use, and support sustainable procurement by OEMs and industrial customers globally.

NBC Bearings’ sustainability roadmap includes adopting clean energy, improving manufacturing efficiency, supporting green transportation, and contributing to circular economy principles through initiatives like bearing remanufacturing.

About National Engineering Industries Ltd (NBC Bearings)

Founded in 1946, National Engineering Industries Ltd (NBC), is an integral part of the CKA Birla group (formerly the CK Birla Group) and manufacturer of the NBC brand of bearings. CKA Birla Group is today a multibillion-dollar diversified conglomerate with over 35,000 employees and 50+ manufacturing facilities across India and the world, with a presence in diverse sectors including technology, automotive, home and building and healthcare. NBC is India’s leading manufacturer and exporter of bearings with manufacturing capacity of 250 Mn bearings annually in over 3100+ variants for application across automotive, railways, aerospace and industrial segments to serve customers in more than 30 countries. It also serves the Indian aftermarket through a countrywide network of over 550 authorized stockiest and thousands of retailers.

Headquartered in Jaipur, NBC is the only bearing manufacturer in the world to win the prestigious Deming Grand Prize (2015). With an employee strength of over 3,000 and five manufacturing plants in Jaipur (2), Bagru (Rajasthan), Newai (Rajasthan) and Vadodara (Gujarat), NBC is equipped with global manufacturing and process technology and has one of the best R&D centers in India. Apart from being technologically advanced, the company practices methods of sustainability by using alternate sources of energy and increasing the efficiency of the manufacturing process by leveraging on the power of digitization.

In 2020, National Engineering Industries Ltd, acquired Kinex bearings in Europe through its subsidiary NBC Global Ag, to enhance, diversify and provide best-in-class products to its existing and potential customers. In 2022, NBC Global Ag opened its Global Technology Centre in Germany to support innovation and provide support to NBC’s global growth.

In 2024, NBC Bearings has ventured into the aerospace segment, leveraging its precision engineering expertise to support India’s growing ambitions in aviation and space technologies.

For details, visit: https://nbcbearings.com/

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Blog

The Role of High-Speed Bearings in Powersports and High-Performance Engines

Role of High-Speed Bearings in Powersports

Powersports refers to motorised vehicles used for motorised vehicles used for recreation or competition. These vehicles are fitted with high-performance engines as they need to handle tough terrains and extreme conditions. Though these big and high-performance engines play a key role, a lot of supporting systems and components work together to bring out the full potential. A key component that plays a vital role is the high-speed bearing. These bearings are specifically designed to work under high-speed conditions.

These bearings are crucial for the engine’s performance, ensuring smooth rotation even at high speeds. They’re specially crafted to handle the tough demands of powersports applications, allowing for seamless rotation at high RPMs while also withstanding extreme stress and heat.

Spinning Car Wheel

Standard bearings are not the recommended/used in high-performance engines or powersports engines to several reasons including:

  • Increased Friction: Using a standard bearing in high-performance engines can lead to excessive friction & potential seizure as these engines produce more head and friction than standard engines.
  • Material Limitation: Standard bearings are not made of strong material or are heat resistant as high-performance bearings. Thus, it can lead to premature wear and failure.
  • Lubrication Issues: Standard bearings may not be able to handle lubrication requirements of a performance engine and it can lead to friction, wear, and failure.
  • Low Performance: Standard bearings are not designed in a way to bear the extreme operation stress. They may wear out quickly or fail resulting in decreased performance and reduced power output.

Specially made speed bearings are installed in performance engines to provide the strength accuracy and longevity necessary for seamless operation. Using a standard bearing in these engines can definitely be a recipe for disaster.

Benefits of Using High-Speed Bearings in Racing & Powersports

When it comes to racing and powersports all we tend to imagine is extreme speed, roaring engines, adrenaline-pumping speed, and machines pushed to their absolute limits. Though this is all true, a crucial role is also played by components fitted including the precision-engineered bearings. These bearings are unsung heroes that have an impact on performance, reliability, and efficiency.

The key benefits of using high-speed bearings in racing & powersports includes:

Benefits of Using High-Speed Bearings
  • Support Extreme RPMs: High-speed bearings are specifically designed to handle ultra-high speed without failing. These bearings are usually fitted in engines, gearboxes, and other components spinning at 10,000+ RPMs.
  • Heat Resistance: High-speed bearings are made from advanced materials and coatings tolerate higher operating temperatures. These bearings also include advanced cooling features or made from materials that dissipate heat faster. 
  • Reduced Friction: High-speed bearings are crafted from low-friction materials that minimise energy loss, allowing for more power to be transferred to the wheel. This ultimately leads to improved performance.
  • Better Stability: High-speed bearings maintain tight tolerance at extreme speed leading to smoother operation, better handling, and less vibration.
  • Lightweight Design: Ceramic or hybrid materials are commonly used in high-speed bearings. Ceramic or hybrid made bearings provide the bearing the strength it requires to cater extreme conditions without excess weight.

Types of High-Speed Bearing

Various types of bearings are designed to handle the intense demands of high performance engines.

Ball Bearings

High-speed ball bearings are known for their ability to provide low-friction rotation, even at very high speeds. Ball bearings are generally fitted in gearboxes, electric starters, turbos, crankshafts and various other components in racing and powersports engines.

Single Row Deep Groove

Roller Bearings

Roller bearings, such as needle roller bearings and tapered roller bearings, are widely utilised in powersports engines. These bearings manage heavy loads and absorb vibrations effectively.

Single Row Cylindrical Roller Bearing

Thrust Bearings

Thrust bearings are prominently used in powersports engines, especially in clutches and crankshafts. These bearings are manufactured in a way to absorb axial forces and ensure the crankshaft stays properly aligned.

Thrust Ball Bearings

Ceramic Hybrid Bearings

Ceramic bearings are most widely used in powersports engines. These bearings are preferred as they are extremely lightweight and have heat resistant properties. Ceramic bearings are fitted in turbos, wheel hubs, and other high-speed rotating parts.

Hybrid bearings

Selection of Right High-Speed Bearings

Finding the right type of bearing for powersports and racing engines is important as a mismatch can cause faster wear, lower output and failure. A high-speed bearing must match the engine’s load, speed, environment, and lubrication system. There are several factors to consider when it comes to selecting the right bearing for high-performance engine including:

  • Operating Speed: The bearing for racing and powersports engines must be chosen based on the speed rating of the bearing. Choosing a high-speed rated bearing ensures smooth operation at extreme RPMs without overheating or vibrations.
  • Load: Before selecting a bearing for a high-performance engine the load requirement on the engine must be considered. Selection basis the load requirement ensures bearing handle load without failing.
  • Material: The material of high-speed bearing determines its strength, heat resistance, and wear properties. Bearings made of ceramic and hybrid materials are usually preferred for high-speed bearings.
  • Environmental Exposure: Exposure to environmental factors like dirt, mud, sand, water should also be considered before selecting a high-speed bearing. If there’s exposure to dust, dirt, mud, sand, etc a sealed, corrosion-resistant, or coated high-speed bearings should be preferred.

Installation of High-Speed Bearings

Installation of High-Speed Bearings

Installation of high-speed bearings must be done with accuracy to allow a good fit, alignment, and avoid premature failure. The key to installation is having the right tools and following the manufacturer’s recommendations. There are a number of ways the bearings can be fitted. Different techniques of installation depends on the type of bearing and installation location such as press fit installation, thermal expansion installation, slip fit installation, among others.

  • Preparation: This is the first step in the installation and involves cleaning the work area including bearing housings, shafts, and surrounding surfaces.
  • Inspection: The second step involves inspecting the fitment areas and checking the shaft and housing to ensure exact fit within manufacturer tolerances.
  • Installation: Post cleaning and inspecting the area the high-speed bearing can be precisely installed. The bearing can be installed through several techniques including press fit installation, thermal expansion installation, etc.
  • Lubrication & Coating: Post fitment lubrication should be applied before assembly. High-speed bearing grease or manufacturer recommended lubricant should be used.
  • Alignment: The step involves checking the bearing’s seating and alignment, misaligned bearings can lead to uneven loading and heat buildup.
  • Post-installation Run: During the post-installation run listen for any unusual sounds, check for oil pressure and leaks.

The Role of Lubrication in High-Speed Bearings

Lubrication is crucial for high-speed bearings, it helps prevent wear, reduce friction, and dissipate heat. Periodically lubricating high-speed bearing also contributes to performance by ensuring smooth operation and maintains bearing’s integrity especially in high-speed application. Some of the benefits of lubrication includes:

Role of Lubrication

Impact

Reduced Friction

Periodic lubrication or lubrication as per manufacturer guidance minimises metal to metal contact & reduces wear.

Heat Dissipation

Adequately lubricated high-speed bearing prevents overheating & bearing failure.

Corrosion Protection

Applying lube coats the surface & prevents oxidation leading to enhanced durability in harsh conditions.

Protection During Startup

Lubrication protects against dry friction during engine start reducing early wear.

Support Load Capacity

Properly lubricated bearings helps distribute engine loads evenly & handle dynamic loads.

Lubricants for racing & powersports engines must be chosen based on compatibility with the engine type, as it is important for optimising engine performance and longevity in racing. Synthetic lubricants, racing specific lubricants, or manufacturer recommended lubricant should ideally be used.

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Blog

Optimize V-Belt Performance: Maintenance and Lifespan Tips

Maintain Tension & Alignment

V-belt is a crucial component of machinery used to transmit power between different parts of the machine. These flexible elements are usually made of rubber or synthetic materials like neoprene or polyurethane. V-belt is a trapezoidal shape that ensures a secure fit into the shaft’s sleeves. These belts are designed by compressing various fibrous tensile cords for strength and longevity.

Maintain Tension & Alignment

V-belts, due to their trapezoidal cross-sectional shape, provide a better grip on the pulley than flat belts. The V-shaped wedges into the pulley groove lead to better traction and reduced slippage. These mechanical belts are widely used in industrial machinery, automotive engines, agriculture equipment, and more.

The Role of V-Belts in Machinery

Optimize V-Belt Performance

The efficiency of any machinery doesn’t just depend on the big visible parts like motors or engines but it also depends on smaller components like bearings, bushings, pulleys, v-belts, and more. One such important component of these machines is the V-belt.

  • Power Transmission: These belts are crucial for transmitting power from one rotating component of the machinery to another. In conveyor systems v-belt connects the motor with a drive pulley which further moves the conveyor belt.
  • Maintain Tension & Alignment: V-belts also play a role in maintaining constant tension and alignment with the pulleys which helps prevent slippage and ensure smooth power transfer.
  • Shock Absorption: These flexible belts help damp vibrations and absorb shocks caused due to sudden jerks or uneven loads. In agricultural machinery, v-belts play a key role in reducing jerks and protecting the drive system.
  • Maintains Efficiency: V-belts help maintain efficiency by minimising slippage and reducing energy loss.

Common Causes of V-Belt Failure

Various factors may lead to premature failure of these mechanical belts including incorrect tension, misalignment of pulleys, environmental factors and more. Some of the most common causes of v-belt premature failure

Common Causes of V-Belt Failures
  • Improper Tensioning: Improper tensioning of the v-belt, i.e. too tight tensioning can strain the bearings and the belt, while too loose tension can lead to slippage & heat buildup resulting in quick wearout or breaking of the belt.
  • Misaligned Pulleys: Unaligned pulleys can cause the belt to twist and wear unevenly leading to increased vibration, noise, and premature failure.
  • Excessive Heat: The V-belt may get worn out quickly due to excessive heat causing the belt material to weaken and degrade weakening the belt structure and resulting in belt failure.
  • Wrong Belt Type: V-belts are not one-size-fits-all and one size is not suited for all application types. Using the wrong belt type can reduce efficiency and lifetime.
  • Other Factors: Exposure to oils, grease, chemicals, and others can degrade the belt’s rubber and can even cause the rubber to slip resulting in premature failure.

V-belt is a widely used mechanical component, from applications in big mechanical systems like conveyors, compressors, crushers, and pumps these are also used in fans, mixers, screens, and more. However, selecting the right V-belt is absolutely critical for both performance and reliability.

Types of V-Belts

There are various types of v-belts designed for different applications. Some of the common types of v-belts include:

  • Standard or Classical V-Belt: This type of v-belt is also referred to as classical, standard or conventional belts. Standard v-belt is used in a wide range of general-purpose machinery like pumps, compressors, etc. The dimensions of standard v-belts are designated as Y, Z, A, B, C, D, and E.
  • Wedge V-Belt: Wedge v-belt is designed for high-speed and high-torque transmission. They can operate 1.5 to 2 times the load of classical v-belts. Wedge v-belt is commonly fitted in crushers, mixers, industrial gearboxes, and more.
  • Narrow V-Belt: Narrow v-belt as the name implies has a narrower profile but transmits more power than classical belts. Narrow v belts are ideal for compact & high load systems including heavy-duty fans, HVAC systems, industrial drives, etc.
types of vbelt
  • Double or Hexagonal V-Belt: This type of v-belt is shaped like a hexagon and is designed to transmit power from both sides of the belt. A double v-belt can drive multiple pulleys in opposite directions. Textile machinery and agriculture equipment are equipped with this type of belt.
  • Banded V-Belts: Also known as joined v-belts multiple v-belts joined together. This type of v-belt is used in high-power or heavy-duty applications like stone crushers, large fans, and more.
  • Cogged V-Belt: Cogged v-belts are similar to classical belts but they have cogs or notches at the bottom side. Smaller pulleys, automotive, and woodworking machines are usually equipped with cogged v-belts.
  • Agricultural V-Belts: Agricultural belts are wrapped belts designed for more extreme abrasion from dust, sand, grains, and more. This type of belt is made of durable polyurethane blends to cater to harsh working environments.

Factors to Consider While Selecting V-Belts

Now, when it comes to longevity & durability several factors play a key role in enhancing efficiency and avoiding premature failure. Also, finding the right fit guarantees performance, durability, and safety. Some of the key factors to consider include.

Factors What to Consider
Load Requirements Power to be transmitted, i.e. heavier tabs require stronger belts.
Speed in RPM For higher speed, belts that support higher speed are required. Like narrow or wedge belts.
Centre Distance The distance b/w the pulleys affects belt length & tension settings
Operating Environment Belts made of higher grade must be chosen if there is exposure to dust, oil, moisture, etc. Ex: agricultural v-belt.
Space V-belts must be chosen based on application space, if space is limited narrow V-belts are preferred.
Temperature Choose belts based on operating temperature, if operating temperature is more choose belts made to support such temperature.

V-Belt Installation Techniques

Proper installation of a v-belt is essential for ensuring long belt life, proper tension, and safe operation. The installation of v-belts involves the steps mentioned below:

Step 1 – Check Pulleys: The first step in the installation is to check the pulleys thoroughly. The process involves identifying signs of damage and detecting worn-out parts. A damaged or worn-out pulley component may reduce v-belt life, cause slippage of the belt, reduce power transfer, and lead to vibrations.

Step 2 – Check Alignment: Check the alignment using a straight edge or laser alignment tool. Misalignment can lead to premature wear.

V-Belt Installation Techniques

Step 3 – Loosen Tension Mechanism: Loosen the mounting bolts or tensioner to allow belt fitting.

Step 4 – Fit the V-Belt: Place the belt into the pulley groove without twisting or stretching.

Step 5 – Apply Correct Tension: Use a belt tension gauge or follow the manufacturer’s guidelines for correct tension and ensuring safety.

Step 6 – Tighten & Recheck: Secure the bolts and tensioners and re-check the alignment and tension.

Step 7: Run a Test Cycle: Turn the power on and run it briefly. Check for unusual sounds, vibrations, and belt movements.

Step 8: Monitor After Installation: Recheck the belt tension after a few hours of operation, the belt may require tightening as it often stretches slightly.

Routine Maintenance Tips to Extend V-Belt Life

Periodic maintenance of v-belts is key to keeping machinery efficient, reducing downtime, and extending belt life. The maintenance procedure involves

  • Visual Inspection: Visual inspection can be done weekly or as per the manufacturer’s guidelines. The process involves inspecting for cracks, fraying, glazing, etc.
  • Check Belt Tension: Belt tension can be checked every 2 weeks or as per the manufacturer guidelines by using a tension gauge or deflection method.
  • Check For Alignment: Alignment can be checked monthly using a straight edge or laser.
  • Clean the Drive Area: The drive area must be cleaned regularly including removing dust, oil, debris, and chemical buildup.
  • Listen to Noise: Check for unusual sounds during operation as it may indicate slippage or misalignment.
  • Check For Vibration: Vibrations during operations can be checked at monthly intervals, excessive vibration may indicate a loose belt or misalignment of components.
  • Replace: If there are signs of wear, cracks or damage it is recommended to replace the belt.

Common Causes of V-Belt Failure

V-belt failure can result from several factors, improper tension and misalignment are the most frequent causes of V-belt failure. Some other causes of v-belt failure include:

  • Improper Tension
  • Pulley Misalignment
  • Worn Pulleys
  • Wrong Belt Size
  • Contamination
  • Overheating
  • Aged/Cracked Belts

When to Replace a V-Belt?

Replacing a v-belt is essential for maintaining the smooth, safe, and efficient operation of the machinery. V-belt should be generally replaced every 1 to 3 years or as per the manufacturer’s guideline or when signs of wear and damage like cracks, missing chunks, or squealing are present. A few factors that determine if a V-belt needs replacement include:

  • Age: V-belts should be replaced every few years, especially if there’s heavy usage or extreme temperatures.
  • Visual Inspection: If there are signs of damage, cracks, or excessive wear.
  • Squealing Noise: A squealing or chirping noise could also indicate that the belt needs replacement.
  • Manufacturer’s Recommendations: The belt should also be replaced according to the interval recommended by the manufacturer.
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Blog

Wind Turbine Bearings: Enhancing Efficiency in Renewable Energy

Bearing Technologies for Wind Turbines

Bearings are an indispensable part of almost all industrial machinery, household appliances, automobiles, construction equipment, and nearly everything – that has a moving part. From the smallest applications in fidget spinners to utilisation in wind turbines, bearings are everywhere.

Wind power is expanding globally due to increasing environmental concerns, technological advancements, government policies, cost-effectiveness, and more. Wind power is generated by wind turbines, which are gigantic machines equipped with a rotor hub. These turbines can weigh over 200 tons and are fitted with bearings to support the rotating shaft and allow the turbine to operate smoothly. Several types of bearings are used in wind turbines including, spherical roller bearings, tapered roller bearings, cylindrical roller bearings, deep groove ball bearings, and more.

Wind Turbine Bearings

India’s wind energy sector accounts for 10.5% of total power generation, additionally, India aims to generate 50% of the electricity from green sources by 2030. The growth and expansion are highly dependent on the wind energy sector and necessitate the need for high-quality bearings that can sustain high loads, dynamic loads, and more.

Role of Bearings in Wind Turbine Efficiency

Role of Bearings in Wind Turbine Efficiency

Wind turbines are equipped with various bearings used in each section including the pitch and yaw location, main shaft location, and gearbox. These bearings are responsible for the efficiency, reliability, and lifespan of wind turbines. Bearings play a crucial role in ensuring smooth power transmission and supporting the rotating components. The impact of bearings on wind turbine efficiency includes:

  • Reduce Friction: The primary role of bearing in wind turbines is to reduce friction between the moving parts, leading to reduced energy loss and improved overall efficiency.
  • Load Support: Bearings in wind turbines play a crucial role in supporting wind turbines as they operate under fluctuating loads due to speed variations. Bearings play an essential role in distributing the load evenly resulting in stable operation.
  • Support Rotation: Bearings are fitted in the rotor and gearbox and ensure smooth rotation and efficient power transmission. High-quality bearings are critical for optimum turbine efficiency and lifespan.

Types of Bearings Used In Wind Turbines

Several types of bearings are fitted into wind turbines to perform different functions. Here is a rundown of some of the most common bearings within wind turbines:

Cylindrical Roller Bearing

Such bearings are widely preferred for gearboxes and generators. Cylindrical roller bearings are designed to handle high-radial loads generated by the turbine’s gearbox and generator making it ideal for demanding conditions.

cylindrical roller bearing brass

Spherical roller bearings

Spherical roller bearings are usually found in the main shaft of the turbine. These bearings are designed to handle high-radial and axial loads at low to medium speeds.

Spherical roller thrust bearings

Tapered Roller Bearing

Tapered roller bearings are fitted in wind turbines to handle tilting movements. These bearings are usually custom-designed and are commonly used in gearboxes to handle high vibration levels.

Taper Roller Bearing

Deep Groove Ball Bearings

Commonly used in generators and electric motors to handle medium to high radial and axial load, deep groove ball bearings hold weight in loads in both directions.

Single Row Deep Groove

Bearing Technologies for Wind Turbines

Bearing Technologies for Wind Turbines

Wind energy is emerging as a significant source of clean electricity. Wind turbines are fitted with various components that allow for effective energy generation, one such crucial component is the bearing system. The bearings fitted in wind turbines operate under extreme conditions including:

  • High Loads (rotor weight, dynamic load due to wind speed variations)
  • Harsh Environmental Conditions (temperature variations – deserts, arctic regions)
  • Maintenance Challenges (remote locations and size of wind turbines)

However, the wind turbine sector continues to expand necessitating the need for further improvements in the bearing technology.

Technologies Used in Wind Turbines

  • Coating: Bearing technologies like black oxide coating help prevent components from corrosion and other environmental damages, thus enhancing lifespan.
  • Monitoring Tool: Allows for monitoring and predicting issues before complete failure impacting operation. Monitoring technology reduces the risk of damages, increases turbine uptime, and allows for planned maintenance.
  • Lubrication: Bearing technologies like self-lubricating bearings and lubricants resistant to corrosion and wear limit friction and increase the overall life of bearings.

Maintenance of Wind Turbine Bearings

Maintenance of Wind Turbine Bearings
  • Lubrication Management: Lubrication plays a key role in the maintenance of wind turbine bearings. Greasing at periodic intervals and using high-quality lubricants formulated for extreme temperatures minimises friction and wear.
  • Inspection: Bearings must be checked for damages, cracks, and scoring during routine maintenance. Additionally, temperature and vibration monitoring may be performed to check for misalignment, overheating issues, etc.
  • Predictive Maintenance: Tools like advanced monitoring systems help predict bearing damage or failure based on vibration patterns, wind speed, and temperature trends. Predictive maintenance techniques eliminate unexpected breakdowns of wind turbines.
  • Replacement: The bearings in wind turbines must be replaced on their expected lifespan or when there’s a sign of wear or damage. Additionally, proper installation with specialised tools must be done to avoid misalignment and premature failure.

FAQ's

What are the bearings used in wind turbines?

Several types of bearings are used in wind turbines including cylindrical roller bearings, tapered roller bearings, deep groove ball bearings, etc.

What 2 types of bearings are in a turbine engine?

Spherical roller bearings and cylindrical roller bearings are most commonly used in turbine engines.

How long do wind turbine bearings last?

The lifespan of turbine bearings depends on various factors including operational environment and maintenance. Usually wind turbine bearings last 20 years.

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Blog

Self-Lubricating Bearings: A Maintenance-Free Solution

Self-Lubricating Bearings

Self-lubricating bearings, also referred to as maintenance-free bearings lubricate on their own while operating. The bearings are impregnated with lubricants within the sliding layer or pores and as the bearing operates lubrication is released through the pores in the sliding layer.

Self-lubricating bearings are preferred over traditional bearings when lubrication is difficult or costly.

Additionally, these bearings offer several benefits including:

  • Eliminating periodic lubrication reduces maintenance effort and downtime.
  • Longer bearing life and less wear as a result of regular lubrication.
  • Designed for extreme operational conditions where external lubrication is impractical (extremely high or low temperature)
Self-Lubricating Bearings

How Self-Lubricating Bearings Work ?

Self-lubricating bearings continuously supply lubrication while the bearings operate to reduce friction between the moving parts. They are designed to release lubrication gradually during operations. The working of self-lubricating bearings include:

  • Storage: Self-lubricating bearings usually contain lubrication within their structure. Bearings made out of polymer, and porous metal contain lubricants within the structures, while bearings made out of metal contain lubricants in the tiny pores.
  • Release: When the bearing is in motion, the heat and pressure causes the lubricants to mitigate to the surface, creating a lubricating film and reducing friction and wear.
  • Reabsorption: Post-bearing operation, the lubrication gets reabsorbed into the bearing material, avoiding wastage and extending service life.
  • Continuous Process: The process of releasing and reabsorption is a continuous process ensuring a long-term, maintenance-free operation.

A common misconception about self-lubricating bearing is that it does not require additional lubrication throughout the life or they are lubed for life. However, the lubrication eventually runs out, the lubrication is used and needs to be replaced. The bearings are lubed for a long time, not for a lifetime.

Self-Lubricating Technology in Plain Bearings & Bushings

The word self-lubricating is mainly linked with bushing and plain bearings as they are designed to function without the need for any additional or external lubrication. In both areas of application, self-lubrication enhances durability, reduces maintenance needs, and improves performance. Self-lubricating plain bearings and bushings are widely used in automotive components, industrial machinery, medical devices, aerospace, and more.

  • Plain Bearings: These bearings are designed from oil-impregnated metals, PTFE, graphite-lined surfaces, and more. These bearings are known to reduce friction and wear without the need for external lubrication. conveyor belts, precision instruments, robotic arms, hydraulic systems, etc are fitted with self-lubricating plain bearings.
Plain Bearings
  • Bushings: Bushings are small tube-shaped bearings designed to help parts move smoothly. Bushings are usually made from materials like oil-impregnated bronze or PTFE, which release lubrication as they rotate.

Types of Self-Lubricating Bearings

Self-lubricating bearings are made out of different materials and designs depending upon the application and operating condition.

  • Metal-based Bearings: Metal-based bearings are the most commonly used self-lubricating bearings. These bearings are made out of bronze and designed with interconnected pores which store and release lubrication through capillary action during operation. Electric motors, industrial machines, and automotive parts are usually fitted with metal-based self-lubricating bearings.
  • Polymer-based Bearings: Polytetrafluoroethylene (PTFE), nylon, and other materials are used to make polymer-based bearings. Continuous low-friction operation is provided by the solid lubricants embedded in the material. Food processing industries, medical devices, etc all make extensive use of polymer-based bearings.
Polymer-based Bearings
Carbon-graphite Bearings
  • Carbon-graphite Bearings: These self-lubricating bearings are made out of carbon and graphite mixture. Carbon-graphite bearing is ideal for high-temperature & chemical resistant applications. These types of bearings are used in pumps, steam turbines, and chemical processing equipment.
  • Sintered-metal Bearings: Sintered-metal bearings are based on powder-metallurgy technology. It is one of the sliding bearings with high porosity (20-25% in volume), impregnated in a lubricant oil. Sintered metal bearings are suitable for high production rates and are designed to precision tolerances. These bearings are widely fitted in small motors, machine tools, aircrafts, automotives, construction equipment, etc.
Sintered-metal Bearings2

Bimetallic Bearings: A bimetallic bearing is an oil free lubricating bearing. The bearing is based on a steel backing, and the surface is sintered with led-tin bronze alloy.The steel backing in such bearings provide strength and rigidity. Such bearings are widely preferred for high load capacity, have good chemical resistance, and can sustain a wide range of temperatures.

Bimetallic Bearings

Solid Oil Bearing: Solid oil bearings are filled with a solid, porous resin that is impregnated with lubricating oil. As the bearing rotates the lubricant is released through capillaries to ensure its smooth running. This type of bearing is used where there is high centrifugal force or vibration.

Benefits of Using Self-Lubricating Bearings

  • Lower Maintenance Requirement: The key advantage of using self-lubricating bearings is that they do not require any additional oiling device or grease resulting in lower maintenance cost and reduced machine downtime.
  • Cost-Efficient: Using self-lubricating bearings reduces the need for labour costs, and eliminates the need for a lubrication system resulting in reducing overall operational cost.
  • Suitable for Harsh Environment: Self-lubricating bearings are designed to work in extreme temperatures, underwater, and other extreme conditions where traditional lubrication is impractical.
  • Extensive Lifespan: It’s a fact that bearings last longer if they are lubricated well. Self-lubricating bearings operate under continuous lubrication leading to minimal wear and reduced friction resulting in extensive bearing lifespan.
  • Clean Operation: Self-lubricating bearings are designed to avoid lubricant leakage thus making them ideal for food processing, medical devices, etc.
  • Smooth Operation: The continuous lubrication mechanism of self-lubricating bearings helps improve the overall operation of equipment or machines equipped with such bearings by reducing vibration and noise.

Applications of Self-Lubricating Bearings

Applications of Self-Lubricating Bearings
  • Automobile Industry: Self-lubricating bearings are commonly used in the automotive industry specifically in suspension systems, wiper motors, power windows, sunroof, etc. Self-lubricating bearings in automobiles ensure reduced maintenance and longer service life.
  • Aerospace & Defence: Self-lubricating bearings are designed to work in extreme conditions and, therefore, are preferred in aircraft’s landing gear, doors, and control systems.
  • Textile & Printing Machines: The bearings are designed to be dust and lint-resistant thus avoiding clogging and failure. In the textile and printing industry with continuous production lines where stopping for lubrication is impractical, self-lubricating bearings are preferred.
  • Industrial Machinery: Self-lubricating bearings are designed for high loads, harsh environments, and continuous operation without frequent maintenance, thus making it a preferred bearing for conveyors, pumps, and gearboxes where frequent lubrication is difficult.

Self-Lubricating Bearings vs. Traditional Bearings

  • Requirement for Lubrication: While traditional bearings need to be lubricated on a regular basis, self-lubricating bearings have lubrication built in and don’t require periodic lubrication.
  • Maintenance: Regular maintenance including lubrication, cleaning, and inspection is required for traditional bearings, whereas self-lubricating bearings have low maintenance requirements thus reducing machinery downtime.
  • Durability: The durability of bearings is heavily impacted by lubrication. Therefore in traditional bearings, the risk of premature failure is higher if they are not adequately lubricated whereas self-lubricating bearings are constantly lubricated which lowers wear and friction leading to increased durability.
  • Operating Conditions: Self-lubricating bearings are designed to work in extreme temperatures, wet environments, etc while traditional bearings to work in extreme conditions require frequent lubrication and maintenance.
  • Load Handling: Traditional bearings are designed to handle extreme loads effectively while self-lubricating bearings have lower load handling capacity.
  • Friction: Since self-lubricating bearings are under continuous lubrication, there’s low friction and reduced energy consumption, whereas traditional bearings can have higher friction if not properly lubricated.

FAQ's

What are lubricant-free bearings?

Other names for self-lubricating bearings include greaseless lubricant-free and maintenance-free bearings.

Do self-lubricating bearings last long?

The operating load, temperature, and bearing application environment all have an impact on a self-lubricating bearing’s lifespan.

Categories
Press Release

NBC Bearings Hosts Channel Partner Conference in Austria and Slovakia – Accelerating Growth Beyond Boundaries

Vienna
Vienna

~ Channel partners from across India join NBC’s vision to Innovate, Elevate, and Accelerate ~

 Jaipur, 14 April 2025: National Engineering Industries Ltd. (NEI), part of the USD 3 billion diversified CK Birla Group and manufacturer of NBC Bearings, India’s leading bearings brand, hosted its annual Channel Partner Conference from April 7–10 in Vienna, Austria and Bratislava, Slovakia. Themed “Innovate, Elevate, Accelerate,” the event marked a significant step in NBC’s ongoing journey of growth through strategic collaboration with its channel network.

The conference showcased NBC’s commitment to enabling partners to diversify into newer markets, leverage digital solutions, and drive faster, more customer-centric growth. The company reinforced its focus on expanding its industrial bearings portfolio and introduced its Channel Partner Development Program, aimed at strengthening capabilities, fostering innovation, and building long-term competitiveness across the network.

As part of its ambitious growth strategy, NBC announced plans to add over 1,000 new bearing sizes to its portfolio in the current fiscal, further enhancing its ability to serve a wider range of industrial applications. Key sessions during the conference addressed business diversification, anti-counterfeit measures, and the expansion of NBC’s lubricants and industrial product segments.

Rajesh Premchandran, Chief Sales and Marketing Officer, NBC Bearings, said:

“We are at an exciting stage of growth. As we look ahead, our focus is on empowering our channel partners with the tools, speed, and strategic support they need to win in an evolving market. Through deeper collaboration and continued innovation, we are building a future-ready ecosystem that delivers value to every stakeholder.”

The conference also recognized outstanding channel partners during a special awards ceremony. With several partners accompanied by their spouses, the event blended professional engagement with memorable cultural experiences. NBC Bearings remains committed to nurturing strong partnerships and building a dynamic, digitally empowered distribution network that drives collective growth and success.

About National Engineering Industries Ltd (NBC Bearings)

National Engineering Industries Ltd (NEI), founded in 1946, is part of the CK Birla Group, an Indian multinational conglomerate with USD 3 billion in revenue and 35,000 employees. NEI, headquartered in Jaipur, manufactures the NBC brand of bearings and is the only bearing manufacturer to win the prestigious Deming Grand Prize.

NEI is India’s leading manufacturer and exporter of bearings, producing 250 million bearings annually in over 3100+ variants for automotive, railways, aerospace, and industrial applications, serving customers in more than 30 countries. It also has a network of over 550 authorized stockists and thousands of retailers in India.

With over 3000 employees, NEI operates five manufacturing plants in Jaipur (2), Newai, Bagru (Rajasthan), and Vadodara (Gujarat). The company focuses on sustainability, using alternative energy sources and digitization to improve manufacturing efficiency. In 2020, NEI acquired Kinex bearings in Europe through its subsidiary NBC Global Ag and opened its Global Technology Centre in Germany in 2022 to support innovation and global growth. For more details, visit: https://nbcbearings.com/.

Media Contact: Lokesh Dhamija, Head – Brand & Communications, NEI

Lokesh.dhamija@nbcbearings.in

+91 93152 06373

Categories
Blog

Ultimate Guide to Bearing Heaters: Types and Uses for Optimal Performance

Bearings and Their Applications

A bearing heater is a device that is used to heat the bearings before mounting and dismounting them. ‘There is no one size fits all’ approach when it comes to bearings thus necessitating the need for bearing heaters that allow the mounting of bearings by heating them to slide onto the shaft with minimal force without damaging them.

Optimal performance, longevity, and durability of bearings are influenced by the proper installation. Bearing heaters play a crucial role in avoiding misalignment while installing bearings by heating the inner ring of the bearing causing it to thermally expand allowing for easy mounting. Bearing heaters are commonly used for small to medium-sized bearings like roller bearings, ball bearings, sphering roller bearings, cylindrical roller bearings, tapered roller bearings, and more.

Controlled Heating in Bearing Installation - How it Reduces Damage & Improves Efficiency?

Bearing heaters are equipped with temperature sensors to measure the temperature as the bearing heats. Additionally, some heaters are also equipped with adjustable thermostats to prevent the bearings from overheating. Controlled heating is improved for the following reasons:

  • Prevents from Overheating & Damage: Overheating of a bearing can alter its metallurgy and significantly impact the bearing’s hardness and lifespan. The key is to keep the temperature within the manufacturer’s recommended range.
  • Avoids Shaft Damage & Reduce Installation Force: Using bearing heaters with controlled heating for installation avoids the need for cold mounting, which involves applying force to fit the bearing in place, usually causing damage to the shaft and bearing race.
  • Ensure Even Expansion: For even bearing expansion, bearing heaters are widely preferred over ovens or open flames. Bearing heaters are known for consistent uniform heating, evenly expanding the bearings, and preventing distortions.
  • Quicker & Safer Installation: Controlled heating cuts down on mounting time and minimises the possibility of worker injury and shaft damage during installation. Several heaters automatically control temperature and alert when the bearing is ready for installation leading to avoiding overheating and damage.
  • Maintains Lubricant Integrity: Controlled heating avoids uneven heating that can burn off lubricants, affecting lubrication and increasing friction. It ensures that pre-greased bearings retain their lubricant properties.

Why use a Bearing Heater?

Bearing heaters are used to expand a bearing to mount or dismount them without using excessive force or cold mounting/dismounting them. Bearing heaters are commonly used for:

  • Mounting: To mount bearings onto shafts, gears, and other machine components
  • Dismounting: To remove bearings from shafts, gears, and other machine components.
  • Heating other Components: Also used for heating gears, pulleys, bushing, etc.

Advantages of Using a Bearing Heater:

  • Controlled Heating: The most significant advantage of using a bearing heater is that it allows for precise temperature control. The bearing heater maintains a safe temperature to prevent metallurgical damage and ensure the bearing is heated at the right temperature needed for installation.
  • Reduced Bearing Damage: Using a bearing heater eliminates the need for the use of mechanical force – hammering or pressing, thus avoiding the risk of brinelling, cracks, or misalignment during installation.
  • Faster & Efficient Installation: Bearing heaters heat the bearings quickly, allowing for quicker installation, reduced machinery downtime, and eliminating the need for excessive manual force, reducing worker fatigue.
  • Safer Operation: Bearing heaters are considered safer options for heating bearings compared to traditional heating methods like torches with open flames. Bearing heaters eliminate fire hazards with torches and are also built with built-in sensors to prevent overheating.
  • Extends Bearing Life & Performance: Controlled heating helps avoid microcracks or deformities that could lead to premature failure. Additionally, controlled heating ensures that pre-greased bearings retain their lubricant.

Types of Bearing Heaters?

There are various types of bearing heaters available based on the heating method, efficiency, and application size. Some of the most common types of bearing heater are:

  • Induction Bearing Heater: These bearing heaters use electromagnetic induction to heat the bearing. Induction-bearing heaters are the most widely used heaters and are designed with a yoke that is placed through the bearing bore.
  • Hot Plate Bearing Heater: Hot plate bearing heaters use conduction-based heating, the bearing is placed on a heated metal plate. Hot plate heaters are usually preferred for smaller bearings.
  • Cone-style Bearing Heaters: Cone-style heaters as the name implies are cone-shaped and are designed to accommodate bearings of different sizes. The heat in such heaters is transferred through the cone to the bearing’s inner ring.

How to Choose the Right Bearing Heater?

The saying ‘different situations call for different approaches’ holds true when it comes to choosing the right bearing heater. Several factors play a key role when deciding upon the right bearing heater for your needs, some of them are listed below:

  • Bearing Size & Type: Bearing heaters must be chosen based on the size of the bearing. Usually for smaller bearings like small deep groove ball bearings hot plate bearings are used, while for a large spherical roller bearing induction bearing heater is usually recommended.
  • Heating Method: Heaters must be selected based on the heating requirements, induction heaters are used for quick heating while hot plate heaters gradually heat the bearing. In high-production environments requiring quick mounting induction heaters are preferred while hot plate bearings are useful for controlled heating.
  • Application Environment: The application environment plays a key role in deciding upon the right bearing heater. Portable induction heaters are best for on-site maintenance while fixed heaters are best suited for workshops.
  • Energy Efficiency: Choosing the bearing heater based on energy consumption is also a key factor affecting choosing the right bearing. Induction heaters usually consume less power compared to hot plate heaters.

Applications of Bearing Heaters in Different Industries

Industry Application
Automobiles Mounting bearings in engines, wheel hubs, etc.
Power Generation Installing bearings in turbines, generators, and more.
Aerospace Fitting bearings in landing gears, shafts, and engines.
Railways Fitting large bearings in locomotives and rolling stock.
Manufacturing Mounting bearings on machine tools, conveyor belts, etc.

Accessories for Bearing Heaters

  • Heat Protective Gloves: Handling the bearings both before and after they have been heated requires the use of gloves. Heat-protective gloves are designed to prevent burns and also protect the bearings from scratches.
  • Bearing Puller: Bearing puller is used to remove bearings from shafts, housings, and other mechanical parts. The puller ensures that the parts and components are taken out without getting damaged. The bearing puller is designed to operate in confined spaces and allows technicians to extract the bearings, gears, pulleys, etc. while avoiding damage to surrounding parts and reducing machine downtime.
  • Temperature Monitoring Tool: Various types of thermometers like infrared thermometers are used to measure the bearing temperature to prevent overheating. Advanced bearing heaters are equipped with digital thermometers and displays.
  • Supportive Accessories: Accessories like spacer rings, supportive blocks, alignment tools, centring devices, and others are commonly used to ensure proper heating, and installation, and reduce downtime.

FAQ's

What is a bearing heater used for?

A bearing heater is a device that is used to heat the bearings before mounting and dismounting them.

What is the best way to heat a bearing?

The best way to heat a bearing is through the use of a bearing heater. Bearing heaters are used for their temperature control, suitability for various sizes, and safer operations.

What are the names of bearing heaters?

A general guideline is to heat them to a temperature of 80-90°C. However, bearings must be heated as per the manufacturer’s guidelines.

Why do you heat bearings?

Bearings are heated to expand them to mount or dismount them without using excessive force or cold mounting/dismounting them.

Categories
Blog

Understanding Bearing Cages: Types, Design & Applications

bearing cage variants

Bearing cages are essential components in the operation of rolling element bearings. They play a pivotal role in maintaining the spacing of rolling elements (like balls or rollers), guiding their motion, and reducing friction. Without bearing cages, the rolling elements would cluster together, leading to increased friction, heat, and wear, ultimately resulting in premature bearing failure.

Types of Bearing Cages

bearing cage variants

There are several types of bearing cages, each designed to cater to specific applications and operational conditions. Understanding the differences between these types can help in selecting the right bearing cage for your needs.

Type of Bearing Description Features Applications
Stamped Steel Cages These cages are made from thin sheets of steel, which are stamped and formed into shape. High strength, Light-weight, Cost-effective. Commonly used in automotive and industrial machinery where durability and cost efficiency are crucial.
Machined Brass Cages These cages are machined from solid brass. Excellent durability, resistance to corrosion, and ability to handle high loads. Ideal for heavy-duty applications such as mining equipment and heavy machinery.
Polyamide Cages Made from high-strength polymers, often reinforced with fibers. Lightweight, low friction, and resistant to many chemicals. Used in applications requiring low weight and high-speed capabilities, such as in aerospace and consumer electronics.
Crown Cages Also known as “snap-in” cages, they have a unique design that snaps into place. Simplifies assembly and provides excellent guidance for rolling elements. Frequently used in high-speed applications where precise alignment is necessary.

Materials Used in Bearing Cages

Materials Used in Bearing Cages

Bearing cages are manufactured from a variety of materials, each offering distinct advantages depending on the application and operating environment.

Steel

  • High strength, durability and wear resistance.
  • Ideal for heavy-duty and high-load applications.

Brass

  • Excellent corrosion resistance good machinability and high load-bearing capacity.
  • Suitable for harsh environments and heavy machinery.

aluminium

  • Lightweight, good thermal conductivity and resistance to corrosion.
  • Used in applications where weight reduction is critical, such as in aerospace.

Design Considerations for Bearing Cages

Several factors influence the design of bearing cages, ensuring they meet the specific requirements of different applications.

  • Cage Geometry: The geometry of the cage is critical to maintaining the correct spacing and alignment of the rolling elements within the bearing. Properly optimized cage geometry reduces weight while ensuring the strength and stability needed to handle operational loads.
  • Strength and Durability: The material used for the cage must provide sufficient strength to handle the operational stresses without deforming or failing. Common materials include steel, brass, aluminum, and high-strength polymers.
  • Lubrication Requirements: Proper lubrication reduces friction and wear, extending the bearing’s life. Cages often incorporate features such as lubrication channels or reservoirs to ensure that the rolling elements and raceways receive adequate lubrication. The design should facilitate the easy application of lubricants and maintain optimal lubrication conditions throughout the bearing’s life.
  • Manufacturing Precision: High manufacturing precision ensures that the cages fit correctly and function as intended. Tight tolerances must be maintained during the manufacturing process to ensure that the cages provide proper alignment and spacing of the rolling elements. This includes dimensional accuracy, surface finish quality, and consistency in production.
  • Weight Considerations: In high-speed and lightweight applications, the weight of the cage can significantly impact performance. Lighter materials like polyamide or aluminum can be used to reduce the overall weight of the bearing without compromising strength.
  • Noise and Vibration: Excessive noise and vibration can indicate issues with the bearing and reduce the lifespan of the machinery.Cage designs that reduce contact between rolling elements and minimize friction can help in lowering noise and vibration levels

By carefully considering these design factors, bearing manufacturers can produce cages that meet the specific needs of various applications, ensuring reliability, efficiency, and longevity of the bearings. Understanding and optimizing these aspects is crucial for engineers and designers working in industries where bearings play a vital role in machinery and equipment performance.

Manufacturing Processes for Bearing Cages

Processes for Bearing Cages

The production of bearing cages involves various processes to ensure high quality and precision.

Stamping

  • Process: Thin metal sheets are stamped into shape using high-pressure dies.
  • Applications: Common for producing stamped steel cages.

Machining

  • Process: Solid materials are machined into the desired shape using CNC machines.
  • Applications: Used for brass and aluminum cages where precision is critical.

Molding

  • Process: Polymers are molded into shape using injection molding.
  • Applications: Ideal for producing polyamide cages.

Welding

  • Process: Components are welded together to form the final shape.
  • Applications: Sometimes used for complex cage designs.

Quality Control

  • Measures: Dimensional inspections, material testing, and load testing.

Applications of Bearing Cages

Maintenance of Bearing Cages

Proper maintenance extends the life of bearing cages and prevents premature failure. Here are some of the most commonly implemented best practices for regular maintenance:

  • Regular Inspection: Check for signs of wear, damage, or lubrication issues.
  • Lubrication: Follow recommended lubrication schedules and use appropriate lubricants.
  • Cleaning: Keep bearings clean to prevent contamination and wear.

Over time, while noting down exceptions we will arrive at replacements as well. Here are some of the Replacement Guidelines followed:

  • Signs of Wear: Replace bearings showing significant wear or damage.
  • Inspection: Regularly inspect bearings and cages for signs of degradation.
  • Procedure: Follow manufacturer guidelines for replacement to ensure proper fit and performance.

Conclusion

Bearing cages are fundamental to the efficient operation of rolling element bearings, providing essential support in maintaining spacing, reducing friction, and guiding motion. Understanding the different types, materials, design considerations, and applications of bearing cages can help in selecting the right components for specific needs, ultimately enhancing bearing performance and longevity. By keeping up with maintenance practices and embracing emerging trends in bearing technology, industries can ensure the reliability and efficiency of their machinery and equipment.

FAQ's

What is a cage in a bearing?

A cage, also known as a separator, is a component in a rolling element bearing that maintains the spacing between the rolling elements (balls or rollers). This helps in maintaining smooth rotation and extending the life of the bearing.

What materials are used in bearing cages?

Bearing cages are made from various materials including steel, brass, aluminum, and polymers. The choice of material depends on the specific application and operating conditions.

What is the purpose of a bearing cage or separator?

The primary purpose of a bearing cage or separator is to maintain the correct spacing between rolling elements within the bearing.

Do bearings need a cage?

Yes, most rolling element bearings require a cage to function efficiently. The cage ensures that the rolling elements are evenly spaced and do not contact each other, which reduces friction and wear.

What is the function of the cage?

The function of the cage in a bearing is to:

  • Maintain proper spacing between rolling elements.
  • Guide the rolling elements in their path.
  • Reduce friction and wear.
  • Enhance the overall stability and performance of the bearing.

What is a bearing without a cage called?

A bearing without a cage is typically referred to as a “full complement bearing.” In these bearings, the rolling elements are packed closely together, maximizing the bearing’s load-carrying capacity.

How is a bearing cage manufactured?

Bearing cages are manufactured using various processes, including stamping, machining, molding, and welding.

Categories
Blog

Bearing Pullers: A Comprehensive Guide to Types and Applications

bearing puller

Choosing the right bearing is like building a strong foundation – everything else depends on it!

In the same vein, bearing pullers are crucial for safely removing parts like bearings, gears, and pulleys from a shaft or a recess.

We’re all aware of the importance of bearing and how choosing the right one ensures the overall efficiency of machines. However, bearings are required to be replaced, some due to damage, premature failure, or when they naturally wear out, a bearing puller ensures that the replacement is done correctly. The bearing puller also makes it easier to remove bearings from complex and tight spaces in mechanical systems. Around 50 million bearings are replaced annually, and bearing pullers guarantee the correct replacement of the crucial part.

Introduction to Bearing Pullers

A bearing puller is a specialised equipment designed for the removal of bearings from shafts, housings, or other mechanical components. The puller ensures the components and parts are removed without causing damage. The bearing puller is designed to operate in confined spaces and allows technicians to extract the bearings, gears, pulleys, etc. while avoiding damage to surrounding parts and reducing machine downtime.

When it comes to bearings, brute force isn’t the answer – a bearing puller ensures effective dismounting. The same is true for bearing removal, particularly when a damaged or failed component needs to be removed quickly to minimise downtime. Without the proper tools, even a simple task can become difficult. Additional downtime may result from alternative removal methods that may damage nearby parts or components.

Bearing Puller

Working of a Bearing Puller

  • Attachment and Setup: The puller is positioned to grip the bearing with specifically designed jaws.
  • Force Application: The centre screw is turned or the hydraulic system is activated pushing the shaft and pulling the bearing outwards.
  • Extraction: The bearing is gradually removed from its position without damaging the surrounding components.

There is a direct correlation between the use of a bearing puller and the overall performance of machinery. A puller contributes to optimal performance and reliability by ensuring that the bearing is removed effectively without damage, preventing unnecessary wear, reducing downtime and extending the equipment lifespan.

Types of Bearing Pullers

There are various types of bearing pullers, each designed to address specific maintenance needs, ensuring the safe and efficient removal of bearings in various applications.

  • External Bearing Puller: This type of bearing puller is recommended when there is access to the external diameter (bearing’s back). External bearing pullers have the maximum reach and spread. External bearing pullers are of two types:
  • Two-Jaw Pullers: These pullers are compact in size and are used for easy-to-move bearings.
  • Three-Jaw Pullers: Three-jaw pullers are known for better stability and stronger grip and are used for more stubborn bearings.
  • Internal Bearing Puller: Internal bearing pullers are designed for bearings seated inside the housing. Also known as a blind bearing puller, this type of puller grips the inner race or bore of the bearing to extract it.
  • Hydraulic Puller: These pullers use hydraulic force and are known for high precision and greater pulling power. Hydraulic pullers are recommended for large or tightly fitted bearings that require significant force to remove.
  • Bearing Separators: Bearing separators have a split design that surrounds the bearing creating space between the bearing and its mount. Such pullers are recommended for removal of bearing where there is limited space between the back of the bearing and other components of the machinery and where conventional pullers may not fit.

Comparison Chart for Different Types of Bearing Pullers

Feature

External Pullers

Internal Pullers

Hydraulic Pullers

Primary Use

Bearings are removed by gripping the outer race

Bearings are removed by gripping the inner race or bore

Bearings are removed through hydraulic force from large or tightly fitted bearings

Design

Two or three adjustable arms for gripping

Arms or jaws designed to expand inside the bearing

Hydraulic cylinder applies precise force

Applicability

External bearings with easy access

Bearings seated inside housings

Heavy-duty applications & large bearings

Force Application

Manual, through a centre screw

Manual, through a centre screw or hammer

Hydraulic pressure for high force

Ease of Use

Simple, most commonly used

Slightly complex due to internal access

Requires skill to operate hydraulic systems

Precision

Moderate precision, risk of damaging the outer race

High precision, grips securely from inside

Very high precision, offers controlled & powerful removal

Applications of Bearing Pullers

Applications of Bearing Pullers

Automotive Industry

Automotive industry heavily relies on bearings, specifically ball bearings. Bearings are used in engines, wheels, axles and other applications to guarantee smooth operation. Because bearings are an essential part of every moving part of a vehicle they are subjected to a great deal of stress from intricate mechanical systems and constant usage, leading to wear and tear over time. Bearing pullers are the ‘go-to tool’ for replacing and maintaining these bearings which are typically located in complex and tight spaces. The pullers help technicians remove and service the components without causing damage to the nearby parts. Bearings are used in vehicles across various components, like wheels, engines, gearboxes, transmissions, electric motors, pumps, etc. External pullers – Two-jaw and three-jaw pullers are most commonly used in the automotive industry.

Industrial Machinery

Industrial machinery like motors, conveyors, pumps, and gearboxes across factories and production lines rely on bearings for efficient performance. Bearing pullers are utilised for regular inspection, servicing, and replacement of bearings to prevent downtime, optimise productivity, and avoid costly repairs.

Heavy Equipment

Bearings are essential to the effective operation of mining, construction, agricultural equipment and other heavy equipment. Because of the extreme stress they endure the bearings in these machines wear out frequently necessitating routine maintenance or replacement. Hydraulic bearing pullers are commonly used for heavy equipment due to their high pulling force and precision. A variety of heavy machinery including excavators, bulldozers, loaders, conveyor systems, crushers, tractors, harvesters and more bearing pullers are essential tools. Longer equipment lifespan, smooth operation and less downtime are all ensured by bearing pullers and their capacity to withstand the demanding requirements of heavy-duty applications.

How to Choose the Right Bearing Puller?

Similar to how choosing the correct bearing is crucial for efficient and safe operation choosing the correct bearing puller is also crucial for effective performance. When using the correct puller the bearing can be removed correctly without causing any harm to the nearby parts or components. However, there are several things to take into account when selecting the best bearing puller.

  • Application and Bearing Type: When choosing the appropriate bearing puller it is important to consider both the bearing type and its particular application. External bearing pullers (two or three jaws) can be used to replace externally mounted bearings while internal bearing pullers are the recommended type for bearings inside the housing or bores and hydraulic bearing pullers are used for large and tightly fitted bearings.
  • Bearing Size & Capacity: When selecting a bearing puller it’s critical to make sure the shaft diameter and bearing size are appropriate. A mismatch may result in ineffective work or harm to the surrounding elements. Additionally, for versatility adjustable pullers can be used to handle a variety of sizes.
  • Material & Durability: Two of the most important factors to consider when choosing a bearing puller are build quality and durability. Selecting pullers composed of materials with high strength guarantees dependability and durability.
  • Load Requirements: The load requirement must be taken into account when choosing a bearing puller i.e. large bearings or heavy machinery may require the use of a puller with a high load capacity such as a mechanical or hydraulic puller. On the other hand, lightweight pullers are adequate for applications that are less demanding or for bearings with low weight.
  • Accessibility: The selection of the right bearing also depends on the space around the bearing. If the space around the bearing is limited, use bearing pullers with slim arms or two jaw pullers.
  • Frequency of Use: If maintenance is occasional or done in long intervals basic mechanical puller might suffice, while if there is frequent usage or applicability for heavy-duty investing in a high-quality hydraulic puller is more cost-effective.

Using a Bearing Puller?

For a bearing to be removed effectively without causing damage to the surrounding components a bearing puller must be used correctly. Here is a detailed guide on using bearing pullers.

Step 1: Get the Work Place Ready

Disconnect the power source, ensure the machine is in a stationary position and put on safety gear like goggles and gloves.

Step 2: Determine the Type of Bearing

The second step is to identify the type of bearing to be removed/replaced i.e. internal or external. Further choose the right puller based on the bearing size, type, and location.

Step 3: Position the Puller

Put the puller jaws around the outer race for an external bearing and into the inner race in case of an internal bearing.

Step 4: Fasten the Puller

Tighten the puller and make sure it is in line with the shaft or housing to ensure a secure hold on the bearing.

Step 5: Apply Force

For manual pullers rotate the central screw to exert pressure and for hydraulic pullers turn on the hydraulic mechanism.

Step 6: Remove the Bearing:

Once the bearing is loose remove the bearing from the shaft or housing. Examine the bearing to ascertain whether it needs to be replaced.

Maintenance of Bearing Pullers

Maintenance of Bearing Pullers

Proper maintenance of the bearing puller is necessary for its longevity, dependability, and safe operation. The following procedures guarantee the puller’s longevity and effectiveness.

  • Regular Cleaning: The most important step in the maintenance of pullers is cleaning or removing the debris, grease, dirt, etc after usage. A mild cleaner or manufacturer-recommended cleaner should be used to avoid damage. Additionally, ensure the puller is dry before storing it to prevent rust or corrosion.
  • Lubrication: The way lubrication leads to the effective performance of bearings, similarly lubrication of bearing pullers especially central screws, hydraulic fittings, etc ensures reduced friction and ensures smooth operation. Additionally for hydraulic pullers check for fluid levels and replace or refill if necessary.
  • Storage Tips: The overall dependability and durability of bearing pullers are significantly impacted by storage. Pullers need to be cleaned and dried completely before being stored. The puller should ideally be kept in a dedicated case to prevent rust and other damage. Proper storage ensures extended lifespan, improves readiness, and enhances safety. 

Bearing pullers must also be regularly checked for damages, especially the jaws – they may have signs of bending and cracking which may require replacement to avoid accidents. Also, inspection of threads on the screw or rods is equally important, as stripped or worn-out threads may compromise functionality. For hydraulic pullers the hoses, seals, and pumps must be checked for leaks and damages.

Advantages of Using Bearing Pullers

Using bearing pullers instead of traditional methods offers numerous benefits. Some of them are listed below:

  • Efficient Bearing Removal: Compared to manual methods, bearing pullers enable quick and hassle-free bearing removal. It also reduces the physical strain required to disassemble tightly fitted or stuck bearings.
  • Prevents from Damage: Bearing pullers are known and widely used for safely extracting the bearings without damaging the shaft, housing, or surrounding parts.
  • Enhances Safety: Using bearing pullers eliminates the need for hammers or chisels which can be hazardous, additionally, pullers offer a controlled and secure grip, reducing the chance of tool slippage.
  • Improves Maintenance Efficiency: Bearing pullers help speed up maintenance tasks, reducing downtime for machinery.
  • Cost Effective: When removing expensive machinery parts pullers help prevent unintentional damage. They also reduce replacement costs by preventing the needless replacement of damaged shafts or bearings brought on by incorrect removal methods.

Manual Vs Hydraulic Bearing Pullers

Manual Vs Hydraulic Bearing Pullers

FAQ's

What is the function of a puller?

A bearing puller is a specialised equipment designed for the removal of bearings from shafts, housings, or other mechanical components.

What is a bearing tool?

A bearing tool is a specialised tool used to remove bearings, gears, and other components from a shaft or recess

What is the method of removing the bearing?

Removing bearings is done through a bearing puller which ensures it is removed effectively without damaging the surrounding parts. The method of removal depends upon the type and size of the bearing.

How to select a bearing puller?

A bearing puller’s selection depends on various factors like the type of bearing, size, capacity, material, load requirement, etc.

How do you remove a bearing puller?

A bearing puller can be removed by loosening the screw shaft and turning it anticlockwise.

How to extract a small bearing?

A small bearing can be extracted through a compact or small bearing puller with two or three jaws