Internal clearance for radial ball bearings refers to the total distance that one bearing ring can be moved relative to the other ring in the radial direction. This clearance is crucial for the proper functioning of the bearing and can affect factors such as load distribution, noise, vibration, and the bearing's life span.

To calculate the internal clearance for a radial ball bearing, you need to combine the internal clearance choices with installation clearances.

Types of Internal Clearance

1.Radial Clearance: The total distance the inner ring can move radially from its starting position within the outer ring without any external load applied.

2.Axial Clearance: Although less commonly discussed for radial ball bearings, it refers to the total distance the inner ring can move axially (along the axis of rotation) relative to the outer ring.

These tables below should give you a good idea on internal clearances for a radial ball bearing.  Classification of Radial Clearance

Standard Bearing Tolerance Classes & Equivalents

Measuring Internal Clearance

Internal clearance can be measured using feeler gauges or specialized clearance measurement tools. It's typically measured before and after mounting to ensure it falls within the specified range.