Vehicle bearings are very common in automotive applications. They can be found in almost all vehicles and in many important sections of each vehicle. They are necessary parts of the vehicle. So, what are vehicle bearings, what are the major types, how do you select them, and where can you buy them?
If you are new to bearings, or if you need to buy vehicle bearings and want to understand them first, you should read this article.
After understanding the basics, you can purchase vehicle bearings from BKZ Industry, a bearing manufacturer with two factories that can produce many types of vehicle bearings you need.
- First, let’s understand what a vehicle bearing is.
Part 1. What is Bearing in a Vehicle?
A bearing in a vehicle is an important mechanical component used to support rotating parts, reduce friction, carry loads, and help the vehicle run smoothly and safely.
Although vehicle bearings have different types and are used in different positions, their main functions are generally similar. They include:
Radial and Axial Load Capacity
Vehicle bearings are used to carry radial loads, axial loads, or combined radial and axial loads, depending on the application position and bearing type.
Friction and Heat Reduction
Bearings reduce friction between rotating and fixed parts. Lower friction helps reduce heat generation, wear, energy loss, and component damage.
Shock and Vibration Support
Vehicle bearings can help support rotating components under vibration, road impact, and changing loads. A suitable bearing design helps keep the system running stably.
Smooth and Stable Rotation
Bearings help wheels, shafts, gears, pulleys, motors, pumps, and other rotating parts move smoothly with less resistance.
Positioning and Alignment Support
Some vehicle bearings also help keep shafts, wheels, or gears in the correct position, especially in wheel hubs, transmissions, engines, steering systems, and electric motors.
Part 2. 10 Major Types of Vehicle Bearings Used in Automotive
There are many types of vehicle bearings used in the automotive industry because different vehicles and different vehicle systems work under different loads, speeds, temperatures, and working conditions.
In automotive applications, you can find ball bearings, roller bearings, and plain bearings in many positions, such as wheels, engines, transmissions, clutches, steering systems, pumps, motors, alternators, and suspension-related parts.
Here, I will list 10 common vehicle bearing types and explain their characteristics, basic structure, and where they are commonly used.
1. Tapered Roller Bearing
Tapered roller bearings are designed for positions where the bearing must handle vehicle weight and side force at the same time. Their tapered rollers and tapered raceways allow the load to be transferred along an angled contact line, so they can support both radial loads and axial loads.
This is why they are commonly used in wheel hubs, differentials, axles, and heavy-duty truck wheel ends. In these positions, the bearing does not only support rotation. It also helps control wheel or shaft position under cornering, braking, and road impact.
2. Cylindrical Roller Bearing
The strength of cylindrical roller bearings is their high radial load capacity with stable high-speed rotation. Unlike tapered roller bearings, they are mainly designed for radial load support, not strong axial positioning.
Their rollers are straight and have line contact with the raceways, which makes them suitable for shafts that carry heavy radial force. In vehicles, they are often used in gearboxes, transmissions, electric motors, alternators, and heavy-duty rotating shafts.
Some cylindrical roller bearing designs can also allow axial displacement, making them useful where shaft expansion may happen because of heat.
3. Spherical Roller Bearing
Spherical roller bearings are not usually the first bearing type you think of for small passenger cars, but they are important in heavy-duty and special vehicles.
Their biggest feature is misalignment tolerance. The spherical outer raceway allows the bearing to keep working even when the shaft bends slightly or the housing is not perfectly aligned. This makes them suitable for trucks, trailers, off-road vehicles, construction vehicles, and agricultural machinery.
They are used where the bearing must handle heavy loads, vibration, shock, and imperfect alignment at the same time.
4. Needle Roller Bearing
Needle roller bearings are used when the vehicle design has very limited space but still needs strong radial load support.
Their rollers are long and thin, so the bearing can be much smaller than many other roller bearings while still carrying a high load. This makes them especially useful in compact transmission and drivetrain positions.
You can commonly find them in gear shafts, rocker arms, universal joints, connecting rods, clutch systems, and compact gearbox parts. Their main value is not size alone, but the ability to provide load capacity in places where a larger bearing cannot fit.
5. Thrust Roller Bearings
Thrust roller bearings are used when the main force acts along the shaft direction. They are not selected mainly for radial load. Their job is to control axial force.
Compared with thrust ball bearings, thrust roller bearings can usually handle heavier axial loads because rollers provide a larger contact area. In vehicles, they can be used in transmissions, clutches, gearboxes, differentials, steering systems, and heavy-duty driveline parts.
They are especially useful where strong axial pressure is created by gears, clutch movement, or shaft positioning requirements.
6. Deep Groove Ball Bearing
Deep groove ball bearings are the most common “general-purpose” vehicle bearings. Their advantage is not extreme load capacity, but low friction, simple structure, high-speed capability, and wide application range.
They use balls between deep raceway grooves, which allows them to support radial loads and light axial loads in both directions. In vehicles, they are widely used in alternators, electric motors, fans, pumps, pulleys, starters, air-conditioning systems, and other auxiliary rotating parts.
They are usually selected when the application needs smooth rotation, low noise, compact design, and stable speed rather than very heavy load capacity.
7. Angular Contact Ball Bearing
Angular contact ball bearings are different from deep groove ball bearings because they are designed with a contact angle. This contact angle allows them to support combined radial and axial loads more effectively.
In vehicle systems, they are useful where the shaft needs both rotation and more accurate axial positioning. You may find them in wheel hub assemblies, pumps, compressors, gearboxes, electric motors, and some high-speed drivetrain systems.
Their advantage is a balance of speed, rigidity, and axial support. For applications that need higher positioning accuracy than deep groove ball bearings can provide, angular contact ball bearings are often a better choice.
8. Self-Aligning Ball Bearings
Self-aligning ball bearings are used when the main concern is not heavy load, but shaft misalignment.
They have two rows of balls and a spherical outer ring raceway. This structure allows the inner ring and shaft to tilt slightly without causing serious internal stress. Compared with spherical roller bearings, they carry lighter loads, but they run with lower friction and are suitable for smaller rotating systems.
In vehicle-related equipment, they may be used in fans, auxiliary shafts, agricultural vehicles, light machinery, and special vehicle systems where alignment is difficult to keep perfect.
9. Thrust Ball Bearings
Thrust ball bearings are simple axial-load bearings. Their structure usually includes a shaft washer, a housing washer, balls, and a cage. They are suitable for applications where the force is mainly axial and the load is not too heavy.
In vehicles, they can be used in clutch release systems, steering columns, gear mechanisms, and light-duty axial support positions.
Their advantage is low friction and simple axial support. However, they are not suitable for heavy radial loads or severe impact conditions. For heavier axial loads, thrust roller bearings are usually more suitable.
10. Plain Bearings
Plain bearings and bushings are different from all rolling bearings above because they do not use balls or rollers. They support movement through sliding contact between surfaces.
This makes them very useful in vehicle positions with oscillating motion, slow speed, impact load, or limited space. Common applications include engine crankshafts, camshafts, connecting rods, suspension joints, steering linkages, pedals, hinges, and pivot points.
Their advantage is simple structure, compact size, good shock resistance, and suitability for oil-lubricated or self-lubricating systems. In engines, for example, plain journal bearings are often more suitable than rolling bearings because they can support high loads through an oil film.
Part 3. How to Select Vehicle Bearings
After understanding what vehicle bearings are and the major types of bearings used in vehicles, you may want to know how to select the right vehicle bearing from so many bearing types.
To select a suitable vehicle bearing, you need to consider the following factors:
Working Environment
First, you need to check the working environment of the bearing, such as the installation position, speed, load direction, temperature, moisture, dust, vibration, shock load, and lubrication conditions.
For example, if the bearing works in a high-temperature position, you need to choose a bearing that can operate under higher temperature conditions with suitable material, clearance, cage, seal, and lubricant.
If the bearing is used in a wheel hub, it does not only need to run at speed. It also needs to carry the vehicle weight, handle radial loads, axial loads, cornering forces, braking forces, road impact, and vibration. In this case, tapered roller bearings, angular contact ball bearings, or wheel hub bearing units are commonly used, depending on the vehicle design.
By understanding the working environment, you can decide which bearing type is more suitable.
Bearing Size
After understanding the working conditions, you need to check the bearing size. Important dimensions include the bore diameter, outside diameter, width, shaft size, housing size, and installation space.
These dimensions help you decide the actual bearing model or replacement bearing number. If you are replacing an old vehicle bearing, it is better to check the original bearing number, actual dimensions, vehicle model, and installation position before purchasing.
In short, selecting vehicle bearings is not only about choosing a bearing type. You need to check the application position, load, speed, temperature, size, sealing, lubrication, and installation conditions together.
If you are not sure which bearing to choose, you can provide the bearing number, dimensions, vehicle model, application position, working conditions, or drawings to the bearing manufacturer for confirmation.
Part 4. How to Buy Vehicle Bearings?
After understanding how to select vehicle bearings, you also need to know how to buy them from the right manufacturer.
If you are responsible for purchasing vehicle bearings from a manufacturer, you need to consider the following factors.
Check Whether It Is a Real Manufacturer
First, you should check whether the supplier is a real bearing manufacturer or only a trading company. A manufacturer usually has stronger control over production, quality inspection, customization, lead time, and bulk supply.
Check Whether It Can Supply the Bearing Types You Need
Different vehicles and different systems use different bearing types. Before purchasing, you should confirm whether the manufacturer can supply the required types, such as wheel hub bearings, tapered roller bearings, needle roller bearings, deep groove ball bearings, angular contact ball bearings, plain bearings, and other vehicle bearing types.
Check Whether It Supports OEM Service
If you need your own brand, packaging, logo, label, or customized bearing design, you should check whether the manufacturer supports OEM service. This is especially important for distributors, aftermarket brands, and vehicle parts suppliers.
Check Whether It Has the Required Certifications
For vehicle bearing purchases, certifications are important. You need to check whether the manufacturer has the quality certifications required for your market or application, such as ISO 9001 or other automotive-related certifications when needed.
Check Its Quality Control System
Vehicle bearings affect running stability, safety, noise, load capacity, and service life. So you should check whether the manufacturer has strict quality control, including material inspection, dimensional inspection, hardness testing, noise testing, clearance inspection, and final product inspection.
Check Bulk Production and Delivery Ability
If you need vehicle bearings in large quantities, you should also check the manufacturer’s production capacity, factory scale, delivery time, inventory ability, and export experience. This helps reduce supply risk and keeps your purchasing plan stable.
Recommended Vehicle Bearing Manufacturer
To buy the correct vehicle bearings more quickly, you can contact BKZ Industry. BKZ Industry is a bearing manufacturer with 15 years of manufacturing experience, two factories, and bulk production capacity.
We can supply many types of vehicle bearings, support OEM service, provide the certifications you need, and follow strict quality control during production and inspection. If you have bearing numbers, dimensions, drawings, vehicle applications, or quantity requirements, you can send them to us for a suitable bearing solution and quotation.
Final Words
After reading this article, you should now have a clearer understanding of vehicle bearings, including what they are, where they are used, the major bearing types, how to select them, and how to buy them from the right manufacturer.
If you need vehicle bearings for OEM production, aftermarket supply, repair, or industrial vehicle applications, you can contact BKZ Industry. Send your bearing number, dimensions, drawings, vehicle application, working conditions, and quantity requirements, and BKZ Industry will help you find a suitable bearing solution.
