Cycloidal Drive 20:1 for NEMA17 - Printable Robotics Actuator, Twin Discs, Steel Pins, Test Coupon

A compact cycloidal reducer that bolts straight onto a NEMA17 stepper and turns it into a slow, strong robotics actuator. Two cycloidal discs, set 180 degrees apart so they balance each other, roll on 21 steel ring pins. The output comes out on an orange flange with a ready-made screw pattern, so you can bolt an arm, a wheel or a pan-tilt head straight onto it. Every printed part prints flat without supports. **How it works** - Ratio 1:20. The output turns the opposite way to the motor, so 1000…

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