HPI Baja 18T Hardened Steel Pinion SBJ018TO by GPM  [SBJ018TO]

HPI Baja Steel Pinion 18T Of 5mm Bore, Profile Regraded, Use With Stock Spur Gear Or Sbj057T - 1pc - GPM SBJ018TO
Price:
NZD$18.77
Brand:
GPM
Model:
SBJ018TO
Please kindly input your name and email address, we will inform you once we have the restocking.
Or you may find similar product under the
category
Write a review

Overview of the 18T steel pinion

This steel 18-tooth pinion is supplied as one piece and fits HPI Baja models directly. It uses a 5mm bore and a revised tooth profile to match the stock spur gear or the SBJ057T alternative without requiring gearbox modification.

Use this pinion for routine drivetrain swaps or when tuning gear ratios to improve launch or top speed balance. The steel material is chosen for its consistent performance under repeated use and its resistance to accelerated wear.

Fitting guidance: ensure the bore fully seats on the motor shaft, set the mesh to the recommended clearance, and secure the set screw without over-tightening to prevent damage to the motor shaft or gear teeth. Verify mesh after a test run and re-tighten if needed.

Package contains 1pc and is intended for RC-scale use only.

Can I swap this pinion into an HPI Baja gearbox without changes?

Yes, the 18T pinion is a direct-fit item designed to match the stock spur or SBJ057T while keeping the original gearbox layout intact.

What are the best practices for tightening the set screw?

Tighten the set screw to firm engagement without excessive force, check alignment, run briefly, then re-check torque to ensure nothing has shifted.

Will steel reduce gear failures?

Steel pinions resist wear better than softer materials and are a sensible choice for frequent running or when making tuning changes that increase load on the drive train.

Copyright © 2008-2026 rcjaz.co.nz All rights reserved