Cycloidal Pinwheel Reducer

The cycloidal pinwheel reducer uses an eccentric-driven cycloid disc rolling against a ring of pins to deliver very high reduction ratios in a compact, rigid housing. It is widely used on hoisting gear, conveyors, mixers and environmental equipment where shock loads, frequent starts or a large ratio in one stage would overload a conventional gear train.

Single-stage ratios cover 9:1 to 87:1 and two-stage builds extend to 121:1 through 7565:1, so very low output speeds are reached without the long gear trains that add backlash and deflection. Because several pins share the load at any moment, the drive tolerates overload and reversing duty better than a single tooth pair, and the compact rolling geometry keeps torsional stiffness high.

Units are available in foot-mounted and flange-mounted versions with solid output shafts and standard IEC motor adaptors. We check the output torque against the peak load, not only the nominal duty point, then confirm the frame, bearing arrangement and lubricant before the order is released — this matters on crushers, thickeners and bucket elevators where start-up torque can be several times the running torque.

Each reducer is run-tested before packing and delivered as a complete assembly with the ratio, mounting position and motor interface verified. We can combine the reducer with a motor, a brake, a backstop or a coupling in one consolidated shipment, and we keep wear parts and seal kits available for maintenance. Lead time is confirmed against the configuration at quotation.

Send us your motor power, input speed, required output speed, peak torque and mounting position. We will size a single- or two-stage unit, confirm the shock-load margin and return a complete selection with a quotation.