48P Hardened 18-Tooth Pinion - Yokomo YOKPG4818  [YOKPG4818]

Hardened 48P 18T Pinion Overview

This hard precision pinion is intended for 48-pitch RC drivetrains. The 18-tooth size offers a common middle-ground for final ratio adjustments without the need to replace the spur gear, allowing careful tuning of acceleration versus top speed within 48-pitch systems.

Compatibility requires a 48-pitch motor shaft and a matching spur; verify shaft diameter and set screw location on your motor prior to installation. Fit the pinion with proper mesh and confirm minimal backlash to reduce wear on both gear faces.

When making tuning changes, step the pinion one tooth at a time and perform trial runs between adjustments. Secure the gear with an appropriate locking method or correctly torqued set screw, and recheck gear mesh after any break-in or drivetrain service.