Crankshaft Ball Bearing for GT33 Engines OS28330000 by O.S. Engine  [OS28330000]

Fitment Notes for GT33 Crankshafts

This crankshaft ball bearing is supplied as a replacement component for the GT33 engine family and provides a controlled, low-friction bearing surface for the crankshaft assembly. It is designed to maintain consistent rotation under the loads expected in glow RC engines.

Careful installation is essential: clean the seating surfaces thoroughly, use a bearing driver or soft-jawed press to fit the part evenly, and avoid direct hammer blows. Apply a thin coat of engine-safe oil on the shaft during reassembly to reduce initial wear.

Inspect the bearing during routine maintenance and replace it if you detect roughness, vibration, or play that impairs smooth rotation. Keeping the crankcase area free of fuel and dirt will help extend the bearing's service life.