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Pack of 30 small plastic gears with 12 teeth

Unique-Bargains

Unique-Bargains 122A Wire Cap Connector 12 Teeth 30Pcs

SKU CH-KZSH-8CFYW MPN 122A

Thirty 122A plastic gears with 12 teeth and .5 modulus for DIY motor projects

  • Product typeCable Connectors
  • Ideal for DIY vehicles and robots with 12-tooth design
  • 5 modulus gears ensure smooth meshing in small motors
  • 2 mm bore fits common hobby shafts directly
  • 30-piece pack supplies enough gears for multiple projects
  • Durable plastic construction suits educational and hobby use

30-piece 12-tooth plastic gear set

This pack contains 30 plastic crown gears with 12 teeth each, model 122A. They have a 0.5 modulus, 7 mm outer diameter, 5 mm thickness and a 2 mm bore. The gears are designed for small motor DIY projects such as RC cars, robots and windmill models.

Hobbyists building small gear trains

The gears suit makers who need a compact 12-tooth crown gear for light-duty educational or hobby mechanisms. They are not intended for high-torque drivetrains, metal-gear replacements or applications requiring a different tooth count, modulus or bore size.

12-tooth count with 0.5 modulus

The 12-tooth, 0.5 modulus specification defines the gear pitch and meshing compatibility. Verify that your motor shaft matches the 2 mm bore and that the driven gear shares the same modulus before purchasing.

How it compares

Measured against everything we stock in Wire Connectors & Cable Ties, at today’s prices. Recalculated every night.

Price $3.99
Cheaper than about 92% of the 1,040 comparable items (median $13.99).

Specifications

Product
Brand nameUnique Bargains
Product typeCable Connectors

Questions about this item

How do I install the 122A gear onto a 2mm motor shaft and what step is often missed?

Press the 2mm hole onto the shaft, then secure it with a set screw or retaining clip so the gear cannot spin freely under load.

What maintenance will the 12-tooth plastic gear need after extended use?

Inspect the 12 teeth for rounding or cracking; replace the gear if the 0.5 modulus profile no longer meshes cleanly with the mating worm.

What limit appears first when the 122A gear runs continuously in a robot drivetrain?

The plastic teeth heat-soften and wear faster than metal, so tooth deformation under sustained torque becomes the limiting factor.

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