Ball Bearings
Ball bearings also known as bearings and journal bearings are important mechanical components used in a wide range of applications. They are an integral part of various machines and mechanisms, from small household appliances to large industrial equipment.
What are Ball Bearings?
Ball bearings are precision-engineered components specifically designed to enable rotational or linear motion by reducing friction between two moving parts. They consist of a set of small, spherical balls housed within a ring or raceway. These balls distribute the load evenly, allowing for efficient, low-friction movement. The primary purpose of ball bearings is to support radial and axial loads while minimizing friction and wear, thereby extending the lifespan, and enhancing the efficiency of mechanical systems.
For more in depth information please refer to our Ball Bearings Guide.
Types of Ball Bearings
There are four main types of ball bearings used in the industry today. They are:
Deep Groove Ball Bearings
Deep Groove Ball Bearings are one of the most used ball bearing types. They have a simple design and are easy to maintain. Deep groove ball bearings can manage both radial and axial loads in both directions and are ideal for use when a higher load capacity is required. Deep groove ball bearings are available in two variants, single row, or double row.
Angular Contact Ball Bearings
Angular Contact Ball Bearings have a contact angle that enables forces to be transferred from one raceway to another at a specific angle. Ideal for handling combined radial and axial loads, these bearings have an angled raceway that allows them to support thrust in addition to radial forces. Angular contact bearings are available in two variants, single row, or double row.
Self Aligning Ball Bearings
Self Aligning Ball Bearings work in a similar way to standard ball bearings but feature two rows of balls which help with alignment by rotating in parallel with the outer ring. The inner ring features two raceways and the outer ring has one raceway.
Thrust Ball Bearings
Thrust Ball Bearings are specifically designed to handle axial loads. They have two bearing discs with raceways for the balls and are designed to support axial loads in one direction only. Thrust ball bearings are often used in applications where high axial load capacity is required.
Sealed Bearings
Sealed bearings are a type of ball bearing that are pre-lubricated and shielded from contaminants with seals built into the bearing itself. These seals help to keep out dirt, dust, and moisture, which can significantly extend the lifespan of the ball bearings and reduce maintenance requirements. Sealed bearings are often used in applications where lubrication is difficult or impossible, or where contamination is a major concern.
While all sealed bearings utilize balls as the rolling elements, not all ball bearings are sealed. Ball bearings can be open, shielded, or sealed. Open bearings have no seals or shields, shielded bearings have metal shields that offer some protection from contaminants, and sealed bearings have non-removable seals that offer the highest level of protection.
Types of Seals in Sealed Bearings
- Contact seals: These seals make direct contact with the inner or outer ring of the ball bearing, providing a tight seal but potentially increasing friction.
- Non-contact seals: These seals have a small gap between the seal and the bearing ring, offering less friction but potentially allowing some contaminants to enter.
Industrial Applications of Ball Bearings
Ball bearings are essential components in a wide range of industrial applications. Their ability to handle both radial and axial loads with low friction makes them ideal for various machinery and equipment. Here are some common industrial uses:
Material Handling Equipment
Ball bearings are used extensively in conveyors, rollers, and other material handling equipment. They enable smooth and efficient movement of materials, reducing friction and energy consumption. Heavy duty ball bearings are often required in these applications to handle the weight and stress of heavy loads.
Electric Motors
Ball bearings are crucial for supporting the rotating shafts in electric motors. They help to reduce friction and noise, improve efficiency, and extend the lifespan of the motor. Precision ball bearings are often used in high-speed motors to ensure accuracy and reliability.
Pumps and Compressors
Ball bearings are used in various types of pumps and compressors to support the rotating shafts and impellers. They help to reduce friction and wear, improve efficiency, and ensure reliable operation. Industrial ball bearings are essential in these applications due to the demanding operating conditions.
Machine Tools
Ball bearings are used in various machine tools, such as lathes, milling machines, and drilling machines. They provide accurate and smooth movement of the cutting tools, ensuring precision and efficiency. Precision ball bearings are crucial for achieving the required accuracy in these applications.
Automotive Industry
Ball bearings are used in various automotive applications, including wheels, steering systems, and engines. They help to reduce friction and wear, improve fuel efficiency, and enhance vehicle performance. Sealed bearings are often used in automotive applications to protect the bearings from contaminants and extend their lifespan.
How to Select the Suitable Ball Bearing for Your Needs
Choosing the right ball bearing for your application is crucial for optimal performance and longevity. Here's some practical advice to help you make the right choice:
- Load Capacity: Determine the radial and axial loads that the ball bearing will need to support. Choose a ball bearing with a sufficient load rating to handle the expected loads.
- Speed: Consider the rotational speed of the application. Ball bearings have different speed ratings, so choose one that can handle the required speed.
- Operating Environment: Consider the environmental conditions, such as temperature, moisture, and contamination. If the application is exposed to harsh conditions, consider using sealed bearings or industrial ball bearings designed for such environments.
- Precision: Determine the required level of precision for the application. Precision ball bearings are used in applications that require high accuracy, such as machine tools and robotics.
- Size: Measure the required shaft diameter and housing bore to ensure the ball bearing fits correctly.
- Material: Consider the material of the ball bearing components. Different materials offer different properties, such as corrosion resistance, wear resistance, and load capacity.
Trusted Ball Bearing Manufacturer, Supplier & Distributor in Australia
RS offers a comprehensive selection of high-quality ball bearings for sale in a variety of sizes and ratings. Our bearings are available in standard open types or for more challenging applications where added protection is required, our sealed or shielded bearings are a great choice. With RS, you can find ball bearings from industry-leading brands like SKF, NSK, FAG, Igus, and more. We also offer fast delivery across Australia. For details on our delivery services and fees, please visit our Delivery Page.