Common RC helicopter bearing size for shafts and drivetrain support.
Standard metric bearing for structural support
This 10-19-5 bearing is commonly used in main shaft supports, tail assemblies, and other load-bearing rotating parts in RC helicopters.
Specifications:
Inner diameter (ID): 10 mm
Outer diameter (OD): 19 mm
Width: 5 mm
Type: Deep groove ball bearing
Material: Steel construction
Application: Main shaft blocks / drivetrain

![Bearings d10xD19xW5 [Thunder Tiger]](https://akirahobbies.com/wp-content/uploads/2026/04/PV0244.jpg)


![Bearing [Thunder Tiger]](https://akirahobbies.com/wp-content/uploads/2026/04/PV0182.jpg)
![Ball Bearing d12xD18xw4 [Thunder Tiger]](https://akirahobbies.com/wp-content/uploads/2026/04/PV0197.jpg)
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