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Consider Preload (Optional but Important)

• Preload improves stiffness and positional accuracy.

• It's often applied in machine tool spindles or high-precision applications.

• Preload values are specified by the manufacturer or based on application needs.

To calculate or select angular contact ball bearings, you typically focus on:

1. Contact angle

2. Load ratings (radial and axial)

3. Bearing life

4. Load distribution

5. Preload and mounting configuration

Below is a step-by-step overview of the calculation and selection process:

Step-by-Step Angular Contact Ball Bearing Calculation

 Identify Applied Loads

You need to know:

• Radial load (Fr) – force perpendicular to shaft

• Axial load (Fa) – force along shaft axis

• Direction of axial load

• Speed of rotation (n, in RPM)

 Determine the Bearing Contact Angle (α)

• Choose or confirm contact angle from manufacturer: 15°, 25°, 30°, 40°

• Larger angles (e.g., 40°) can carry higher axial loads, but reduce speed capacity.