AC 220V Worm Gear Reducer Gearbox Speed Reduction w/ Speed Controller 120W 180W. Rated Voltage: AC 220V. Protection class: IP54; Shaft Bore Diameter: 14mm;18mm CAD Dimension reference picture; Low noise: db. Application: Widely used in lifting, packaging, printing, textile, dyeing, chemical, food, medical, pharmaceutical construction machineries. And advertising, office, petrochemical, instrumentation, stage lighting, transmission, automatic warehouse, parking access control system and other equipments. 1 AC Worm Geared Motor & 1 Speed Contorller. This controller has ability to infinitely vary speed in range of 6.7%100% (stepless speed regulation), only used for AC 208230V/240V one-phase speed Adjustable motor (can’t used for Non-adjustable motor). When reduce speed will proportionally decrease torque and power. How to select item from “rpm”? Speed: find the most suitable speed you need. If don’t have exactly speed, you can select a higher speed one, and use controller reduce speed to your need. Torque: we advise test your loading torque first, the loading torque should not exceed our Rated Torque. If use speed controller speed adjust motor speed, however, torque reduce in proportion to speed reduce. So we remind you select speed most close to your normal use. Power: after speed and torque are confirmed, power is obvious confirmed. Please leave a message to tell us the amount you want to declare so that we can send the item to you. For the long-time holiday, we’ll post the info on our store and reply you automatically via emails. We’ll try our best to help you solve the problem.