3RACING 3RAC-SG4877 77T Competition Spur Gear  [3RAC-SG4877]

3RACING 48 Pitch Spur Gear 77T - 3RAC-SG4877
Price:
USD$4.40
Brand:
3Racing
Model:
3RAC-SG4877
Condition:
Brand New
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Race-Focused Drive Component 3RACING 3RAC-SG4877

The 3RACING 3RAC-SG4877 48 pitch 77 tooth spur is intended for competitive setups where predictable gear engagement matters. Its 48 pitch profile is standard for many 1/10 racing platforms, making it a reliable choice when tuning gear ratios for track conditions.

Chassis Integration and Tuning

Use this spur on compatible 1/10 on-road chassis and pair with precision 48 pitch pinions to achieve the intended backlash and contact pattern. Small adjustments to motor position can fine tune acceleration and top speed characteristics for a specific track.

Workshop Best Practices

When installing the 3RAC-SG4877, set a consistent mesh and verify the contact pattern across several rotations. Inspect for runout and secure all fixings; routinely check mesh after heat cycles or heavy loads to maintain optimal performance.

What gear mesh should I aim for in racing setups?

Aim for a tight, even contact across the tooth flanks with minimal lateral play; this reduces impact loads and improves consistency lap to lap.

How do I check for spur runout?

Mount the gear and rotate it while observing contact; any wobble or uneven contact indicates runout and may require replacement or re-boring.

When should I consider a different tooth count?

Adjust spur or pinion tooth counts when you need a clear change in acceleration or top speed to suit track layout, but always re-evaluate mesh and drivetrain temps after changes.