HPI Baja CNC Steel Pinion Set 16T & 18T 5mm Bore - SBJ01618TO by GPM  [SBJ01618TO]

HPI Baja Steel Pinion 16T & 18T With 5mm Bore, Profile Regraded, Both For Use With Stock Spur Gear Or Sbj057T - 2pcs set - GPM SBJ01618TO
Price:
USD$20.30
Brand:
GPM
Model:
SBJ01618TO
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Precision-engineered steel pinion set

This is a technically focused 2-piece steel pinion set intended for HPI Baja drivetrains, including one 16T and one 18T unit. Each pinion is produced to tight profile tolerances with a 5mm bore to fit common motor shafts, and the tooth geometry is regraded for consistent engagement with the stock spur gear or the SBJ057T reference spur. The set is aimed at hobbyists who require precise gear ratio adjustments to optimise acceleration versus top speed without altering the spur gear.

Manufactured for durability, the steel construction offers improved wear characteristics under typical RC torque loads and repeated swaps. Use these pinions for controlled testing of final drive outcomes, verifying mesh and backlash under static conditions before dynamic runs.

Compatible Models

  • Stock Spur Gear
  • Sbj057T

Fit these precision pinions to tune gear ratios on HPI Baja setups, confirm accurate mesh and backlash, and replace worn components with hardened-steel equivalents.

What shaft diameter do these pinions require?

They are specified with a 5mm bore to match standard 5mm motor shafts; ensure your motor shaft is correct and undamaged before fitting.

How should I check for correct mesh?

Set motor position and use feeler or paper methods to confirm minimal backlash and no tooth binding; rotate by hand to verify smooth engagement before powering the system.

Are these pinions heat treated or surface hardened?

These items are supplied as hardened steel pinions intended for improved wear resistance relative to softer materials; inspect for wear periodically in high torque applications.

What testing is recommended after fitting?

After setting mesh and tightening, perform low-speed runs to confirm noise and heating are normal, then progressively increase speed while monitoring motor load and gear condition.