20 Piece Plastic Gear Set For RC Cars And Robots, 40 Teeth Model 402A Reduction Worm Gears, 0.5 Modulus, 21mm Outer Diameter, 3.7mm Thickness, 2mm Bore, Durable Crown Gears For DIY Motor Projects

20-Piece Plastic Gear Set for RC Cars and Robots
✔️ 40 teeth, 0.5 modulus, 21mm OD, 2mm bore, 20 pcs set

These 20-piece plastic crown gears are designed for hobby RC cars, robots, and DIY projects. They deliver a lightweight, affordable gear reduction option for learning gear trains and building small drive systems.

✅ 20 pieces included in pack
✅ 40 teeth Model 402A reduction gears
✅ 0.5 modulus for compact gear trains
✅ 21mm outer diameter, 3.7mm thickness
✅ 2mm bore for common micro shafts
✅ Crown gears suited for RC cars, robots, and DIY projects

💡 What is a typical use for a small plastic gear set in hobby RC cars and robotics?

This gear set is handy for quick drive reductions and learning gear ratios in hands-on projects.

- Handy for teaching gear ratios in beginner kits
- Useful in micro RC cars and small robots with 2mm shafts
- Great for DIY windmills or educational demos to show speed vs torque