MG520T/0.5M 45CR Steel 20T Motor Pinion (48 Pitch, Module 0.5mm) by GPM  [MG520T/0.5M]

RC Motor Pinion Summary

This is an RC-scale motor pinion manufactured in 45CR steel and supplied as a direct replacement for motors that match the listed dimensions. The gear has 20 teeth (20T) with a 48 pitch, module 0.5mm profile and a rounded motor hole sized to fit motors with a 5mm motor tooth diameter.

The part geometry targets consistent mesh and straightforward swaps: overall thickness measures 10mm, tooth face thickness is 5mm, and the tooth face outer diameter is 12mm. Use these measures when checking mesh clearance against a spur gear and to verify motor shaft and set screw alignment before running.

Installation notes: seat the rounded motor hole fully on the motor boss, secure the pinion with the supplied screw shaft, check axial placement for correct mesh, and re-verify mesh after a short break-in run. This pinion is intended for electric scale RC use only and is not for full-size vehicle applications.