MG322T/0.5M 40Cr Steel 22T Motor Gear (Module 0.5mm, 3.175mm) by GPM  [MG322T/0.5M]

Hardened 40Cr 22T pinion overview

This 22-tooth motor gear is specified for RC motor use and is defined by its core dimensions: 22T, module 0.5mm, and motor tooth diameter 3.175mm. The gear body is 40Cr steel with a hardened black surface treatment to increase wear resistance over untreated stock gears.

Design details: the motor gear uses a round-shaped centre hole sized for motors matching the listed tooth diameter, and it is secured to the motor pinion shaft using two 3x3 set screws to provide a reliable mechanical joint. These design elements are intended to promote consistent mesh and minimise slippage under normal RC load conditions.

Fitment and selection: confirm your motor's pinion parameters—module 0.5mm and 3.175mm motor tooth diameter—before ordering, since the gear is intended for motors that match these dimensions. When fitting, set the correct gear mesh with the spur gear and use appropriate thread locking on the set screws where applicable for your setup.

Tuning role: upgrading to a hardened 40Cr steel pinion is a common maintenance or durability step for drivetrains that experience tooth wear; expect this part to act as a direct replacement when dimensions match.