MG219T/0.5M 19T Motor Pinion 0.5M 40Cr Steel for RC Applications by GPM  [MG219T/0.5M]

Motor Pinion Gear Details

This MG219T/0.5M is an RC-scale motor pinion designed around a 19-tooth profile and a 0.5mm module, intended for use in model drivetrains where the motor tooth diameter is 2.2mm. The pinion is made from 40Cr steel and treated for harder surface resistance to wear, intended to provide a longer service life compared with untreated stock gears.

Key fitment features include a round motor bore sized for standard 2.2mm motor tooth diameter interfaces and a retention method using two 3x3 set screws. Before installation confirm the motor shaft and spur gear module match the listed 0.5mm module and 19T tooth count to ensure correct mesh and avoid premature wear.

Installation notes: mount the pinion onto the motor shaft with the bore flush to the shaft shoulder when applicable, tighten each 3x3 set screw incrementally to avoid misalignment, and verify pinion-to-spur mesh by checking backlash under normal wheel load. During tuning, small changes to pinion size or mesh can affect torque and top speed in the RC drivetrain; keep records of changes so you can revert settings if needed.