Have a Dayton made Craftsman 7" bench grinder. 3450 rpm., 4.4 amp, 110 volts. Induction motor of course.
Would a fan speed control or light dimmer work to slow the speed without harming the motor?
Bill
Ceiling fans have more windings to accommodate speed. Typical induction motors are not capable of multi speed unless listed for that purpose (ex: some furnace fans)
Are you replacing a on/off switch with a variable speed switch or replacing a broken variable speed switch with a cheaper non name brand variable speed switch?
If it is the last one then no it wont hurt it. If its the first then yes it will work but id be afraid to try it on a good grinder just because it wasn't made for it.
You can't control the speed of a single phase induction motor. Any speed control has to be built into the motor; no external device. A universal motor (brushes) can be controlled by a variable speed device.
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