All grinding wheels have a maximum speed, generally based upon the diameter of the wheel.Slower speed equals cooler grinding. But it takes an instant longer. A slower speed is handy if you change grinding wheels for other rotary devices. All the fixed base grinders that I have used have been single speed.
I have and the router control device works but it comes down to what type the motor is...and amps.
Router control device 15 and 20 amp. types.. can be had.
The one I tried was a 15 amp.type..
Thans Jig I assume then if the device (speed adjuster) is rated for 15 or amps you can use it as long as the motor on the grinder does not draw anymore than the rated device.
I will have to experiment and maybe even try a dimmer switch for a light and see if that works.
The dimmer switch will not work,you will cook in about 2 mins. or so or less .. ,I know you will say they say that it's rated at 15 amps. but it can't take on....it's a very light duty pot..or slider..
Well after reading and learning thanks to the peopl eon this forum I have come to the realization that it may just be easier to buy a grinder with a variable speed built right into the unit.
The grinders I have looked at are about $60.00 and then you add the variable speed unit and it is over $100 plus shipping.
So Sears has one for $100 with built in speed control :
Router motors and most bench grinder motors are significantly different. The commercially available speed control for routers will not AFAIK work on a bench grinder.
If the grinder has a universal motor, such as a router, it should work. Most grinders have induction motors and they won't like it. If you try it, watch the motor temperature carefully.
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