40Cr Steel 18T Motor Gear (Module 0.5mm, Motor Tooth Diameter 2.2mm) - MG218T/0.5M by GPM  [MG218T/0.5M]

Precision pinion for micro motors

The MG218T/0.5M motor pinion is an RC-scale replacement part made from 40Cr steel with a hardened black finish for improved wear resistance and consistent power transfer. The gear has 18 teeth at a 0.5mm module and a motor tooth diameter of 2.2mm, matching common small motor specifications.

Fitment and securing are straightforward: the pinion features a round motor bore and is retained using two 3x3 set screws. Before installation, verify the motor shaft diameter, module, and tooth count to confirm compatibility; only motors matching these parameters should be used.

For tuning use this pinion as a direct like-for-like replacement or when a hardened-steel option is needed for extended life under typical driving and tuning loads. Installation requires basic tools and care to ensure the set screws are tightened evenly to avoid misalignment.