Ball bearing 9 x 20 x 6 mm

Ball bearings are used where moving parts are required to run with minimal play and minimal friction. The more ball bearings are used, the better the mechanics of a helicopter work and the lower the wear rate.
The dimensions of a ball bearing mean:
inside diameter (ID) x outside diameter (OD) x thickness.

• Ball bearing 9 x 20 x 6 mm

Important: The inner ring of a ball bearing (in rocker shaft levers, mixing levers, etc.) must be able to rotate freely. Shims are used to provide clearance where necessary. Shims are also used to compensate for excessive play that can result when tolerances stack up.