40Cr Steel 20T Motor Pinion MG220T/0.5M (Module 0.5mm, 2.2mm) by GPM  [MG220T/0.5M]

20 Tooth 0.5 Module Pinion Details

The MG220T/0.5M is a 20-tooth motor pinion supplied as a spare or replacement for motors that match its specified tooth profile and shaft dimensions. Key dimensions are provided so you can confirm compatibility: 20 teeth, module 0.5mm, and motor tooth diameter 2.2mm. The bore is round and designed for motors with that tooth diameter, and the part is fixed with two 3x3 set screws.

Constructed from 40Cr steel, the pinion is finished with a darkened surface to lower initial reflectivity and to help with basic wear resistance versus untreated steel. For hobby drivetrains this means stable geometry under normal loading and reliable engagement with matched spur gears.

Check the pinion module and motor tooth diameter against your motor and spur before purchase. Proper mesh and shaft seating are crucial: press the pinion onto the shaft, establish correct backlash with the spur, then tighten the pair of set screws evenly to prevent misalignment. Do not assume fitment for motors with different shaft or tooth standards.