XRAY NT1 Second Pinion 21T 7075 Hard Coated - Arrowmax AM-NT1-338521  [AM-NT1-338521]

Replacement second pinion for XRAY NT1

The Arrowmax AM-NT1-338521 2nd gear is a drop-in replacement pinion made from 7075-T6 aluminium with a hard coating to reduce wear during on-track use. It is produced to match the XRAY NT1 spur geometry and is intended for competitive RC drivetrains.

Fit this gear when you need to change the final drive ratio or swap out a worn second gear; altering tooth counts will change acceleration and top speed so keep a log of stock and new tooth counts while tuning. The gear family covers 16T through 23T tooth options for stepwise ratio changes without altering other drivetrain components.

Installation notes: press the gear onto the NT1 second shaft, check concentric seating and correct axial position, then set pinion-to-spur mesh with minimal, even clearance across the tooth face to prevent premature wear. After installation, run a short break-in at moderate loads and re-check mesh and fastener torque before full-power runs.