UDL Mechanical Speed VariatorTramec UDL Disc type mechanical variator operates on an elliptical disc that provides infinitely variable reduction ratio. Output speeds range from 76 to 12% of motor input speed, while multiplying torque proportionally to speed reduction at an 84% average efficiency. Machinery designers appreciate the simple, low cost, low maintenance, and reliable nature of these compact mechanical speed variators. Features: 3 sizes IEC 63B5, 71B5, 80B5 input