20T Motor Pinion MG320T/0.5M — 40Cr Steel, 0.5mm Module, 3.175mm Bore by GPM  [MG320T/0.5M]

20-tooth motor pinion, module 0.5

This 40Cr steel pinion is intended as an RC drivetrain replacement for motors specified with a 0.5mm module and a 3.175mm motor bore. The 20-tooth layout features a round motor hole sized for secure fixing via two 3x3 set screws.

Material and finish: the pinion is produced from 40Cr steel with a hardened black surface treatment to enhance resistance to wear and extend operational life in transmission use.

Compatibility guidance: ensure your motor details show a 0.5mm module and a 3.175mm motor tooth diameter to avoid the need for machining or adaptor fittings.

Fitting procedure: seat the pinion so the round hole fully engages the shaft, then tighten the pair of 3x3 set screws. After installation, inspect gear mesh and adjust backlash to prevent premature tooth wear.

Performance role: ideal as a durable replacement pinion or for modest gearing changes where a stronger steel option is preferred in scale model transmissions.