EA-550 Industrial Sewing Machine Brushless Electric Servo Motor With Needle positioner.Energy Efficient - Saves up to 70% Electricity. 3/4HP, 550 Watts Powerful Heavy-Duty electric servo motor for any type of industrial sewing machines for light to heavy duty work including straight stitch machines, overlocks, zigzag stitching machines, blindstitch machines, heavy duty walking foot and heavy duty upholstery machines.Uses the same mounting holes as a clutch motorNo noise or vibration when machine is not runningDraws minimal electricity when machine is not runningIncludes needle positioner (Synchronizer), motor will run with or without the synchronizerHigh Torque D.C. Electronic Servo MotorEasy to adjust speed & motor direction with buttonsNo clutch discAdjustable belt tightenerBelt guards, pulley & mounting hardware includedLight weight Approx. 10-12 lbs. (5 kgs)Starts-up at low speedWorks well on heavy duty machinesSpeed 0 - 4,200 RPM110 Volt, 3/4HP, 550 Watts, 50/60hz