Energy Saving The 110 volt, 550 watt Enduro SM-550 electric servo sewing machine motor can save up to 70% of your electric use when compared to an equivalent power clutch motor. Compact & Lightweight The Enduro SM-550 servo motor is smaller and lighter than a comparable clutch motor. The smooth and quiet operation makes this servo motor virtually noise-free. Speed & Direction Control The operational speed of the Enduro SM-550 servo motor can be easily and quickly adjusted with the speed-control knob. The motor is reversible at the flip of a switch and no clutch or brake disc is required. High-Torque Motor The Enduro SM-550 is a high-torque, clutchless, 110 volt 3/4 horsepower, 550 watt sewing machine motor that operates at a maximum speed of 3300 RPM. Operational Ease and Noiseless Performance Easily adjust the SM-550's motor speed by using the speed-control knob prominently located on the side of the motor. Once properly adjusted, the SM-550 operates smoothly and is virtually noiseless. Energy Efficient The Enduro SM-550 can save up to 50% in energy costs over a conventional clutch-type motor. The SM-550 is built for years of quiet, energy efficient performance. Everything You Need The Enduro SM-550 electric servo motor uses the same mounting holes as your current servo motor and the kit includes mounting bolts, vibration dampers, on/off switch, belt cover, attaching hardware and even an extra set of carbon brushes.