GPM MG220T/0.5M 40Cr Steel 20T Motor Gear (Module 0.5mm, 2.2mm Motor Tooth Diameter)  [MG220T/0.5M]

20T 0.5mm Motor Pinion Gear

This GPM MG220T/0.5M is a 20-tooth motor pinion intended as a direct RC-scale replacement or spare for motors that match its tooth profile and shaft fitment. The part lists the critical dimensions up front so you can confirm fit: 20T tooth count, module 0.5mm, and a motor tooth diameter of 2.2mm. The gear uses a round-shaped bore designed to accept motors with that tooth diameter and is secured with two 3x3 set screws.

Manufactured in 40Cr steel, the gear is supplied with a darkened surface treatment to reduce initial glare and provide baseline wear resistance compared with untreated steels. In practical terms for RC drivetrains, this material choice targets dimensional stability under normal hobby loads and predictable meshing with matched spur gears.

Before purchasing, verify the pinion module and motor tooth diameter against your motor and spur gear. Correct mesh and shaft seating are essential: slide the gear onto the motor, set proper backlash with the spur, then tighten the two set screws evenly to avoid shifting. This pinion is suitable for any motor that matches the listed parameters; do not assume fitment for motors with different shaft or tooth specifications.