3RACING 64 Pitch 21T Pinion Race Grade 3RAC-PG6421  [3RAC-PG6421]

3RACING 64 Pitch Pinion Gear 21T (7075 w/ Hard Coating) - 3RAC-PG6421
Price:
USD$3.80
Brand:
3Racing
Model:
3RAC-PG6421
Condition:
Brand New
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Race focused 3Racing pinion for consistent mesh

The 3Racing 64 Pitch Pinion Gear 21T is produced for drivers who demand repeatable gear engagement in competitive settings. Fabricated from 7075 aluminium with a hard coat, the component reduces inertia while delivering a durable contact surface suited to high RPM duty.

Technical benefits for tuning

The 64 pitch cut yields predictable tooth contact and helps maintain backlash stability across thermal cycles. Use the 3Racing 21T pinion when fine tuning gear ratios to achieve the desired trade off between acceleration and top speed.

Best practice installation

Set axial position precisely and secure the pinion to the motor shaft with correct torque. Verify tooth contact under simulated load and recheck after break-in laps to ensure optimal wear patterns and maximum service life.

What pinion material properties are critical for racing?

High strength to weight ratio and surface hardness are key; 7075 aluminium with a hard coating offers low mass and improved wear resistance suitable for race applications.

How should I validate gear alignment on the bench?

Use feeler gauges or a paint transfer test across several rotations to confirm uniform contact; small axial adjustments are preferable to avoid edge loading.

Are there recommended run-in procedures?

Start with conservative pinion sizes and moderate throttle runs, inspect for even wear, then progress to full race loads to establish stable contact patterns before competition.