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

Pinion Gear Summary

The MG315T/0.5M motor pinion serves as a direct-fit replacement for motors matching its bore and tooth specifications, delivering a compact 15-tooth profile at a 0.5mm module. Constructed from 40Cr steel, the pinion receives heat treatment and a blackened finish to boost surface hardness and wear life.

Important specifications include 15T, module 0.5mm, and a motor tooth diameter of 3.175mm; the round bore is sized to accept matching motor shafts. Retention is via two 3x3 set screws that clamp the pinion to the shaft when tightened evenly.

For reliable operation, confirm the spur gear module and tooth count match before installation, and verify alignment and mesh after the first short runs. Regular inspection during early use will catch any seating or clearance issues before they cause damage.