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

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

This Kyosho UM321C steel pinion is a dedicated 21-tooth gear intended for use in 1/48 scale radio-controlled drivetrains. As a direct replacement part it focuses on providing consistent meshing with matching spur gears while resisting wear better than softer materials.

When fitting a pinion like this, check the gear mesh and axial alignment on the motor shaft, secure the set screw to the motor pinion hub without over-torquing, and verify smooth rotation before full runs. Regular inspection of teeth and the mating spur gear will help maintain reliable drivetrain performance.

Specifications

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

This pinion serves as a straightforward replacement or tuning component for small-scale RC drivetrains where a steel 21T gear is required, offering a balance of durability and predictable 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.

Is this pinion compatible with all 1/48 scale models?

Compatibility depends on motor shaft diameter and spur gear pitch, this part is specified for 1/48 scale use but confirm fitment on your chassis before installation.

What does 21T mean and how does it affect performance?

21T indicates 21 teeth; tooth count influences gear ratio and motor load, choosing different teeth alters speed and torque characteristics in the drivetrain.

How should I set gear mesh with this steel pinion?

Adjust axial position to achieve minimal backlash and even tooth contact, rotate the gears slowly while checking for binding, then secure the pinion set screw to the motor hub.

Is UM321C a direct replacement for older UM321 parts?

UM321C is listed alongside older part references in some sources; verify model number and dimensions against your original part to confirm direct interchangeability.

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