How to Select the Right Ball Bearing: A Simple Guide
At Engineers Mate, we aim to make it easy for you to understand what bearing you need for your industrial application. Take a look at our simple guide or get in touch with our team to day to find out more.
1. Understand Your Application Requirements
Start by assessing your operating conditions and technical needs:
Load Type:
- Radial Load (acts perpendicular to the shaft)
- Axial Load (acts along the shaft)
- Combined Load (both radial and axial forces)
Speed:
- High-speed applications may require precision, low-friction bearings.
- Slower, heavy-load applications often use roller or plain bearings.
Misalignment:
- Choose self-aligning bearings or spherical plain bearings for applications with shaft deflection or misalignment.
Environmental Conditions:
- Consider exposure to dust, moisture, chemicals, or extreme temperatures.
- Sealed or stainless steel bearings may be more suitable for harsh environments.
2. Measure Your Bearing Dimensions
To identify or replace a bearing, measure these three critical dimensions:
- Bore (Inner Diameter): Fits onto the shaft
- Outside Diameter (OD): Outer edge of the bearing or housing
- Width: Overall thickness of the bearing
Tip: Use a digital calliper for accuracy. Where available, refer to the bearing reference number engraved on the bearing body
3. Check for a Bearing Reference Number
Many bearings come with a reference code that provides key information, such as:
- Series/type (e.g., 22212, 6304, NU205)
- Sealing/shielding (e.g., 2RS, ZZ, Open)
- Internal clearance or tolerance (e.g., C3, P5)
If the number is unreadable or missing, use your measurements and application details to cross-reference the correct replacement.
4. Select the Right Bearing Type
Match your application to the appropriate bearing type:
Deep Groove Ball Bearings
- General-purpose, high-speed, radial loads
Angular Contact Bearings
- Combined radial/axial loads, high-speed spindles
Tapered Roller Bearings
- Heavy-duty combined loads, automotive, gearboxes
Cylindrical Roller Bearings
- High radial loads, limited axial load
Spherical Roller Bearings
- High misalignment tolerance, heavy radial and axial loads
Needle Roller Bearings
- Compact design, high load in limited space
Plain/Spherical Bearings
- Oscillating or low-speed pivoting motion, misalignment
Linear Bearings
- Smooth linear motion in CNC, automation, and guides
Thrust Bearings (Axial)
- High axial loads in vertical shafts or rotary tables
Insert Bearings & Housings
- Easy mounting in agricultural, conveyor, and industrial systems
5. Consider These Additional Factors
- Sealing Requirements: Open, shielded, or sealed bearings depending on contamination risk
- Lubrication: Pre-lubricated or re-lubrication capability for long service life
- Material: Chrome steel, stainless steel, or plastic based on environmental exposure
- Fit & Mounting: Shaft tolerances, housing types, and mounting methods all affect bearing choice
How to Choose The Best Ball Bearing for Your Needs
Selecting the right bearing is essential for maximising equipment efficiency and lifespan, therefore, our team of experts is here to help you and ensure that you will make the best choice for your specific application needs. Things to consider when choosing the perfect bearing for your needs include:
- Rotational Speed: Selecting a bearing that is appropriate for the speed of your application ensures long-lasting equipment and high-quality performance.
- Operating Environment: To select the best bearing type for your needs, take into account variables like temperature and any pollutants.
- Inner and Outer Dimension: Depending on the application and shaft size, the bearing must meet specific dimensions.
- Material: For some applications, the material of the bearing may be relevant. Some of our bearings may be found in stainless steel or standard bearing steel.
- Load Capacity: Matching the bearing to the applied load ensures smooth operation and prevents equipment failure.
Engineers Mate: Your Trusted Ball Bearing Supplier
At Engineers Mate, we are committed to providing you with the high-quality ball bearings and exceptional service you deserve. With our extensive selection of products, we are one of the fastest-growing bearing suppliers and stockists in the UK and we are sure we can help you keep your projects running smoothly.
We are centrally located in the UK and our engineering services are available 24/7, which allows us to offer fast delivery options and to deliver our services across the UK. Contact us today for a quote or to know more about our services. We will be happy to help you!
Get in Touch with Engineers Mate
At Engineers Mate, we’re committed to keeping your operations running smoothly. Whether you need a quick replacement for a critical breakdown or expert advice on improving your plant’s efficiency, our team is here to help.
From sourcing high-quality MRO supplies to offering tailored solutions that optimise performance, we’ll work closely with you to meet your unique needs. No matter the challenge, you can count on us to deliver peace of mind and reliable support.
Fill out the form, and a member of our team will be in touch shortly to assist you.