3Racing 3RAC-SG4890 48P 90T Spur Gear - Competition Grade  [3RAC-SG4890]

3RACING 48 Pitch Spur Gear 90T - 3RAC-SG4890
Price:
USD$4.40
Brand:
3Racing
Model:
3RAC-SG4890
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Racing Grade 48P 90T Spur Gear by 3Racing

The 3Racing 48 Pitch Spur Gear 90T, model number 3RAC-SG4890, is specified for competitive use where consistent gear mesh and predictable wear patterns matter. The 90 tooth count lowers pressure per tooth and supports stable torque transfer in high demand running conditions.

Technical Notes for Setup

  • Tooth Count: 90T to reduce individual tooth loading during high torque bursts
  • Pitch: 48P to match widely used race pinions and allow straightforward ratio changes
  • Material: Selected for a balance of hardness and toughness to avoid brittle failure
  • Application: Recommended for racers and tuners as a durable replacement or upgrade part

What is the best method to set gear mesh for endurance runs?

Use a thin feeler to set a consistent backlash, tighten the gearbox, then run brief high load tests and recheck mesh. Consistency across runs extends gear life.

Which pinion sizes pair well for tight acceleration?

Select smaller pinion tooth counts for quicker acceleration, but ensure the motor and ESC can handle increased current. Balance acceleration with thermal limits for reliability.

How should I monitor spur wear during events?

Inspect tooth faces for rounding or chips between mains. Keep a spares set ready and replace if wear changes mesh or increases noise under load.