Ball bearing - How To Discuss

Ball bearing,

Definition of Ball bearing:

1. A bearing between a wheel and a fixed axle, in which the rotating part and the stationary part are separated by a ring of small solid metal balls that reduce friction.

2. Bearing which uses balls as the friction reducing mechanism.

How to use Ball bearing in a sentence?

1. Typical coefficient of friction for a ball bearing is about mu = 1.5e - 3.