Bearings are crucial for smooth and efficient motion in mechanical systems, while reducing friction, wear, and noise.
There are various types of bearings, including ball bearings, roller bearings, Slewing Ring Bearings, etc.
This guide will explore different types of bearings, their working principles, advantages and disadvantages, common applications, and best practices for selection and maintenance.
The primary purpose of bearings is to support loads with minimal friction and wear, ensuring efficient motion, reducing energy consumption, and providing stability, precision, and reliability to mechanical systems while minimizing noise and vibration.
Ball bearings use rolling balls to reduce friction and can handle radial or thrust loads.
They have a compact design, require minimal lubrication, and are cost-effective.
However, these types of bearings have limited load capacity, are sensitive to misalignment and contamination, and can be noisy.
They are used in electric motors, automotive wheels, machinery, aerospace, and household appliances.
When choosing ball bearings, it's essential to consider factors (see the figure below) such as load capacity, speed and precision requirements, size and fit compatibility, lubrication and sealing needs, tolerance for runout and rigidity, material and construction suitability for the environment, etc.
For more details, please refer to the figure below.
Types of ball bearings:
They are ideal for limited space or high-speed applications, and can handle both radial and axial loads.
They are suitable for applications with limited space or where a stationary component is required, and they can handle both radial and axial loads.
They absorb radial forces, making them ideal for applications with shaft and housing misalignment, and feature a double row of balls guided by a cage and inner ring raceway.
They are suitable for diverse industrial applications that demand precise and high-performance operation, particularly for transferring high axial and radial forces.
They have a simple design that makes them easy to maintain and suitable for various applications.
These types of bearings have low torque, making them ideal for high-speed operations.
They offer low friction, high precision, and compact design for easy installation and maintenance, often used with other bearings to support rotating machinery.
They are ideal for high-speed applications, extreme temperatures, and environments exposed to corrosive substances.
For more information on ceramic bearings and their applications, visit Ceramic Bearings.
Roller bearings utilize cylindrical, tapered, spherical, or needle-shaped rollers to evenly distribute loads, reducing stress and friction for smooth motion.
Advantages include high load capacity, improved efficiency, rigidity, accuracy, low vibrations, easy maintenance, and axial displacement adjustment.
Disadvantages include higher cost and noise. These types of bearings are used in automotive, industrial, aerospace, construction, energy, railway, marine, etc.
When choosing the right roller bearing, consider factors such as load capacity, speed requirements, operating conditions, mounting and installation, and budget.
Here are some common roller bearing types.
They are widely used in various industries and offer reliable performance and durability.
They are widely used in different industries and offer reliable performance, long service life, and low friction.
They are utilized in various heavy-duty applications and offer excellent durability and performance.
They are widely used in various industries and offer excellent performance, reliability, and space-saving design.
They are widely utilized in various heavy-duty applications and offer excellent performance, durability, and load-carrying capacity.
They are widely used in different industries and offer precise motion control, compact design, and reliable performance.
Maintain these types of bearings with proper lubrication, regular inspection, correct handling, avoidance of overload and misalignment, and clean environment.
Slewing ring bearings support heavy loads and ensure efficient load transfer and smooth rotation.
They have advantages like high load-bearing capability, versatility, customizability, space-saving design, and smooth rotation.
However, they come with higher cost, complex installation, heavy weight, misalignment sensitivity, and regular maintenance requirements.
Slewing bearings offer a wide variety of solutions for the most demanding specifications in a variety of applications, including Heavy equipment, Aerospace and defense, Robotics, Renewable energy, Medical systems, etc.
Select slewing ring bearings based on load capacity, stiffness, operating conditions, mounting, gear requirements, and maintenance.
Types of slewing ring bearings include ball slewing bearings, Roller Slewing Ring Bearings, Combination Slewing Ring Bearings, Thrust Ball Slewing Rings, wire race bearing, etc.
Some are standardized and some with flanged. Gears for these slewing bearings include external gears and internal gears and some without any gears.
For more details of these types of bearings and their features, refer to the following picture.
Best practices for maintaining types of slewing ring bearings include regular inspection, proper lubrication, correct handling and installation, avoiding overload and misalignment, keeping the environment clean, and following manufacturer's guidelines.
Cam followers are types of bearings that follow a cam lobe profile to transmit motion and load between machine parts.
Despite offering high load capacity, they have limitations in high-speed or high-precision applications and require more maintenance.
These types of bearing are widely used in machinery, aerospace, food processing, etc. Consider their pros and cons before choosing.
When selecting cam followers, you have to consider factors such as load capacity, operating conditions, cam profile, bearing type, lubrication, mounting and installation, cost-effectiveness, and manufacturer reputation.
Two main types of cam followers:
Refer to the two figures below, you'll have a clearer idea of the above two cam followers.
To well maintain cam followers, you have to inspect for wear/damage, ensure proper mounting and alignment, avoid overloading, monitor operating conditions, follow manufacturer's lubrication recommendations, and choose quality followers from reputable manufacturers.
Plain bearings are types of bearings which minimize wear and friction between two surfaces using low-friction materials and lubrication.
Advantages include simple design, self-lubrication, and heavy load handling.
Disadvantages include higher friction, wear over time, and maintenance requirements.
Used in various industries such as automotive, aerospace, and power generation for low-friction sliding or rotational motion.
When choosing plain bearings, you have to consider the load capacity, operating conditions, bearing type, material selection, lubrication, clearance, installation and alignment, etc.
Types of Plain Bearings include:
The two figures below shows the features of the above two plain bearings.
To maintain plain bearings, it is recommended to lubricate them regularly, ensure cleanliness, proper alignment and clearance, control temperature, inspect for wear and damage, replace worn-out bearings promptly, and follow the manufacturer's guidelines.
Linear bearings are types of bearings which enable smooth and precise linear motion using a carriage with a rolling element that moves along a rail or track.
Advantages include high precision, low-friction motion, and long service life.
Disadvantages include higher cost and sensitivity to dirt, debris, and potential noise or vibration.
They are widely used in CNC machines, industrial automation, medical equipment, and printing and packaging machinery.
When choosing linear bearings, consider factors such as load capacity, operating conditions, bearing type, material selection, lubrication, clearance, installation, cost-effectiveness, and manufacturer reputation for reliable and efficient linear motion.
Types of Linear Bearings：
See the figure for a detailed classification of linear bearings.
To maintain linear bearings, you have to do regular lubrication, keeping clean, proper clearance and alignment, monitoring for wear and damage, prompt replacement of worn-out bearings, following manufacturer's recommendations, providing training for personnel, and consulting with experts for specific maintenance requirements, etc.
Mounted bearings are pre-assembled units that reduce friction and wear, supporting rotating shafts in stationary housings.
These types of bearings offer easy installation, versatility, and reduced maintenance, but have higher initial cost, potential for misalignment, and limitations in high-speed or high-precision applications.
They are widely used in various industries such as conveyors, HVAC systems, food processing, packaging, agriculture, mining, construction, etc.
When selecting mounted bearings, consider load capacity, operating conditions, types of bearings, material, lubrication, clearance, tolerances, cost-effectiveness, manufacturer reputation, and ease of mounting.
Types of mounted bearings:
For more details of these types of bearings, please see the figure below.
To maintain mounted bearings, follow best practices such as regular lubrication, proper cleaning, alignment, temperature monitoring, inspection for wear and damage, prompt replacement of worn-out bearings, training personnel, following manufacturer's recommendations, and consulting experts for specific maintenance requirements.
| Type | Load Type | Speed | Cost | Best For |
| Ball Bearings | Radial + Axial | High | Low | Motors, appliances |
| Roller Bearings | Radial + Axial | Medium | Medium | Industrial machinery |
| Slewing Ring | Radial + Axial + Moment | Low | High | Cranes, wind turbines |
| Plain Bearings | Radial + Axial | Low-Medium | Low | Sliding motion |
| Linear Bearings | Linear only | High | Medium | CNC, automation |
| Cam Followers | Radial + Axial | Medium | Medium | Machinery, aerospace |
| Mounted Bearings | Radial + Axial | Medium | Medium | Conveyors, HVAC |
Bearings are vital for supporting motion, heavy loads, and reducing friction, wear, noise, and vibration.
Types of bearings include ball, roller, plain, and linear, each with their own pros and cons.
Choosing the right bearing based on load capacity, speed, environment, temperature, and maintenance is crucial for optimal performance and reliability.
Proper maintenance, including lubrication and wear monitoring, is essential for extending lifespan.
For applications that push beyond standard catalogue options, refer to our custom bearing supplier selection guide for OEM projects to understand when and how to specify a non-standard solution.
Seek guidance from experts in selecting and maintaining the right types of bearings.
Bearings are broadly categorized into seven main types: ball bearings, roller bearings, slewing ring bearings, plain bearings, linear bearings, cam followers, and mounted bearings. Each type is engineered for different load conditions, speeds, and operating environments, so the right choice depends entirely on your specific application requirements.
Ball bearings use spherical balls as rolling elements, which makes them ideal for lighter loads and higher speeds with minimal friction. Roller bearings, on the other hand, use cylindrical, tapered, or spherical rollers that make line contact with the raceway rather than point contact — this gives them significantly higher load capacity and better rigidity, though they typically operate at lower speeds than ball bearings.
The most common types of ball bearings include deep groove ball bearings, angular contact ball bearings, self-aligning ball bearings, thrust ball bearings, flanged bearings, thin section bearings, miniature bearings, and ceramic ball bearings. Deep groove ball bearings are by far the most widely used due to their versatility and ability to handle both radial and axial loads at high speeds.
For heavy radial and axial combined loads, roller bearings — particularly spherical roller bearings and tapered roller bearings — are the go-to choice. For applications requiring rotation under extremely heavy combined loads with moment forces, such as cranes or wind turbines, slewing ring bearings are specifically designed for the job.
Start by identifying four key factors: the type of load (radial, axial, or combined), the required operating speed, the working environment (temperature, contamination, moisture), and any space constraints. Once you have these figured out, refer to a bearing selection guide or consult with a bearing specialist — choosing the wrong type can lead to premature failure and costly downtime.