XRAY RX8 Motor Pinion 19T Hardened 7075-T6 - Arrowmax AM-RX8-348519  [AM-RX8-348519]

Precision Pinion for XRAY RX8

This Arrowmax AM-RX8-348519 pinion is a purpose-made replacement for the XRAY RX8, engineered as a direct-fit motor pinion for clutch and gearbox arrangements on that chassis.

Machined from 7075-T6 aluminium and treated with a hard finish, the tooth profile is cut to mesh smoothly with XRAY spur gears. Arrowmax supplies this design across multiple tooth counts including 16T, 17T, 18T, 19T, 20T and 21T so you can alter gear ratio by swapping pinions without changing the spur.

Installation notes: verify correct mesh and axial alignment before first run, fit any required shims or a pinion spacer to match the RX8 motor mount, and tighten the set screw to the original torque spec. Small mesh and backlash adjustments will influence wear and drivetrain noise, so recheck after a short test lap.

Tuning role: changing pinion teeth shifts the acceleration versus top-speed balance; fewer teeth favour stronger initial response while more teeth raise theoretical top speed. Make changes in small steps and inspect both pinion and spur for wear regularly.