FS70U Crankshaft End Bearing Compatible with GT22 - OS44731000 by O.S. Engine  [OS44731000]

Crankshaft End Bearing Specified for FS70U and GT22

This O.S. Engine component, catalogued as OS44731000, is a replacement crankshaft ball bearing intended for FS70U and GT22 engine references shown in the product title. It functions to stabilise crankshaft end play and ensure reliable rotation within nitro model engines.

Fit this bearing when the original exhibits signs of wear, such as gritty rotation or increased axial movement. Prior to installation, inspect the crankshaft journal and bearing bore for damage, clean mating surfaces, and confirm whether a press fit or slip fit is required. The description avoids stepwise repair instructions while stressing inspection and fit checks.

For tuning and routine service, a correctly installed crankshaft bearing reduces unwanted shaft movement and lowers friction losses, aiding steady idle and consistent high-rpm behavior in nitro RC powerplants. Follow the engine maker’s guidance for lubrication and service intervals.