Crankshaft Ball Bearing OS23730000 by O.S. Engine  [OS23730000]

Precision bearing description

This crankshaft ball bearing is provided as an aftermarket replacement for routine maintenance and complete engine rebuilds. It functions as the rotating support inside the crankcase where crank journals run, reducing friction and minimising wear during operation.

Replacement typically takes place during rebuilding or troubleshooting excess play or rough crank rotation. Proper installation includes cleaning the bearing seat, checking for shaft runout, and ensuring correct bearing alignment; common methods include a press or careful tapping with a non-marring driver to avoid race damage.

Installed correctly, a steady, well-seated bearing helps stabilise idle and throttle characteristics by keeping crankshaft motion consistent. The bearing supports mechanical reliability rather than altering compression or ignition timing directly.

Use this bearing when you detect worn support or noise at the crank to reinstate smooth rotation and protect other engine parts.