MG315T/0.5M 15T 0.5mm Motor Pinion 40Cr Steel for 3.175mm Motors by GPM  [MG315T/0.5M]

Motor pinion gear overview

This MG315T/0.5M motor pinion is an RC-scale replacement part designed for motors that match its dimensions, offering a compact 15-tooth profile with a 0.5mm module. The gear is manufactured from 40Cr steel and finished with a heat treatment and blackened surface to improve wear resistance and maintain consistent meshing over time.

Key dimensions are 15T, module 0.5mm, and motor tooth diameter 3.175mm, with a round motor bore intended to fit corresponding motor shafts. The gear is secured by two set screws sized 3x3, providing a simple mechanical clamp to retain the pinion on the motor shaft.

When integrating this pinion into a model drivetrain, confirm tooth count and module match the mating spur gear to achieve correct gear mesh. Proper seating on the motor shaft and even tightening of the two 3x3 set screws will help prevent slippage; check clearance and alignment after initial run-in and after a few short tests.