What are precision balls used for? Details

What are precision balls used for?

Precision metal balls are used in critical aeronautical bearings, guidance system balls for space and military applications, valves, automotive bearings, cosmetics, and other applications where higher precision is required.

Precision Ball Grading Standards

At Hartford Technologies, we measure precision balls by the following grading standards:

Grade – The grade is a measure of the degree of precision of the ball with respect to key functional characteristics. A lower number indicates a more precise metal ball. For example, a grade 10 ball is more precise than a grade 100 ball.

Diameter – Available in both inch and metric; ranging from 0.5mm to 65mm

Sphericity – The higher sphericity means how close a precision ball is to being a perfect sphere. Also called roundness.

Surface Roughness – The quality of a ball’s surface finish. The better the surface finish, the less “noise” from vibration during bearing rotation. Surface finish can also be critical to providing a tight valve seal.


Contact JHSTEELBALLS to get high quality and precision steel balls for your applications, bearings lines and any other applicable places. We will reply within 24 hours

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