Crankshaft Ball Bearing OS44731000 for FS70U and GT22 by O.S. Engine  [OS44731000]

O.S. ENGINES CRANKSHAFT BALL BEARING F FS70U GT22
Price:
£8.17
Brand:
O.S. Engine
Model:
OS44731000
GTIN:
4531028135581
Condition:
Brand New
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Service Bearing for FS70U / GT22 Crankshafts

This O.S. Engine unit, referenced OS44731000, is supplied as a replacement crankshaft ball bearing for the FS70U and GT22 engine model references noted in the title. It is designed to control crankshaft axial play and enable smooth rotational movement in nitro model engines.

Install this bearing when the existing unit shows deterioration, such as gritty rotation or increased end play. Inspect the crankshaft journal and bearing seat for damage, remove contaminants, and confirm the required fit type before completing assembly. The description refrains from full repair instructions while pointing out key inspection and fitment items.

From a tuning standpoint, a correctly seated crankshaft bearing reduces unwanted shaft movement and lowers friction losses, helping maintain steady idle and consistent high-rpm performance. Use the recommended lubrication and adhere to service schedules provided by the engine manufacturer.

Will this bearing resolve a loose crankshaft in my FS70U?

If excess axial movement is due to a worn crankshaft end bearing, replacing it with OS44731000 can restore correct end play. Verify the journal condition as shaft damage can also cause looseness.

Are there any fitment checks I should do before ordering?

Measure the bore and journal dimensions and compare them to the bearing specification. Confirm whether the original was a press-fit or slip-fit to avoid fitment surprises during installation.

What signs indicate the bearing needs replacement?

Listen for roughness when rotating the crank, check for side-to-side play, and look for scoring or corrosion. Any of these symptoms suggest it is time to replace the bearing.

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