Bests & Worsts Reviews from Amazon

Being in the electrical field and working around motors I had a good feeling this would not work, but I thought what the heck, its only 5 bucks so I will give it a try. I have a single phase .5 HP 110V 1725 RPM motor I wanted to use on a pig roaster so need to reduce the speed way down. Got it hooked up correctly and it only reduces the speed to maybe 1000 RPM. If you reduce it any lower the motor goes into whats called slip speed where the motor loses relative motion causing a jerking motion on the motor that doesn't stop until u increase the voltage some. Its not voltage that increases or decreases the speed on a single phase motor, its line frequency which is Hz You need a VFD which changes the line frequency to reduce the speed of a single phase motor, not a volate regulator. Yes this may work on lights as a dimmer but you cannot control speed with it so I would suggest you change the advertising of this to just a dimmer not a AC motor speed control.