Kyosho UM321C Steel Pinion 21T for 1/48 Scale  [KY-UM321C]

Kyosho UM321C - Steel Pinion Gear(21T)1/48
Price:
NZD$0.00
Brand:
Kyosho
Model:
KY-UM321C
GTIN:
4548565271634
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Durable 21T Pinion for 1/48 Scale

This Kyosho UM321C steel pinion is manufactured as a 21-tooth replacement for 1/48 scale radio-controlled drivetrains. It aims to provide dependable mesh with matching spur gears while resisting wear better than more compliant materials.

During installation, confirm axial alignment on the motor shaft and set the mesh carefully, secure the set screw without excessive force, and run an initial check at low speed. Regularly examine the teeth and mating spur for early signs of wear to avoid drivetrain problems.

Specifications

  • Item: Steel Pinion Gear
  • Material: Steel
  • Model Number: UM321C
  • Compatibility: 1/48 scale RC models

As a replacement or tuning component for small-scale drivetrains, this 21T steel pinion offers a solid balance of longevity and reliable gear engagement.
Remark :
Due to limited stock availability, please notice that some Kyosho items may have to order from the factory and the ready time is around 4-6 weeks. Customer purchases the item is assumed to accept the waiting time which allows us to order directly from the manufacturer if the item is out of our warehouse.

Does steel last longer than plastic pinions in small-scale use?

Steel generally resists wear much better than plastic or nylon options, especially under higher loads. However, check the material of the mating spur gear because a harder pinion can increase wear on softer spurs.

What should I look for when inspecting this pinion?

Look for rounded or chipped teeth, uneven wear patterns, and any burrs on the bore. Any of these signs indicate it is time to replace the pinion to avoid damage to the spur gear.

Is there a break-in or bedding procedure?

A gentle initial run with light loads and brief inspections helps confirm correct mesh and that no unusual noise or heat appears. This reduces the chance of early damage.

Can UM321C replace older UM321 parts directly?

Some references list UM321C alongside earlier UM321 items, but you should verify the exact part number and physical dimensions against your original part to confirm interchangeability.

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