This GPM MG318T/0.5M motor gear is an RC-scale pinion designed for motors that match a 0.5mm module and a 3.175mm motor tooth diameter. Made from hardened 40Cr steel, it provides higher wear resistance compared with basic stock gears and maintains consistent tooth profile under load for predictable power transfer in small-scale drivetrains.
The gear has 18 teeth and a round-shaped motor gear bore sized for a 3.175mm motor tooth diameter, secured by two 3x3 set screws to hold position on the motor shaft. Before purchasing, verify your motor shaft diameter, module, and required tooth count to ensure correct fitment; only motors matching these dimensions should be used.
When installing, check alignment with the spur gear, avoid excessive preload, and confirm set screws are tightened to hold without deforming the shaft; correct meshing reduces premature wear and preserves drivetrain efficiency.
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