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Thanks folks. I'm not trying to thread jack and my apologies to the OP. I'm on a budget and my original thought on reading the thread was to give it a go. After thinking more about it I decided to...

Voidmonster, thank you. I was just trying (unsuccessfully) to point out that you can use a potientiometer, which is basically what a dimmer switch and the Harbor Freight example above are. All a...

Harbor Freight makes a variable speed controller for a router tool. However that being said; A dimmer switch, potientiometers, router type speed controls only work with universal, brush type motors....

TrilliumLT, I think this is a darn fine idea! I don't know why I didn't think of this. Thirty-eight years of being a licensed, Amateur Radio operator and building countless electrical circuits...

Interesting thread. Here is a picture of a Maximum variable speed grinder from Canadian Tire that retails for $139.00
If you look at the variable speed control to the right of the on/off switch, it...