Need 110VAC variable power supply for a power tool

[TommyC]

I plan to purchase a die grinder and want to use in a low-rpm mode. I would prefer to purchase a variable-speed, low-range grinder but the one I really like (Makita GD0810C), 1800 - 7000 rpm, is no longer available.

So I'll end up getting one of the conventional tools that run up to a no-load speed of 20,000 rpm. I need to step this down with (preferably) a simple variable power supply w/ a "rheostat" control on it.

Does anyone know where I can find one "ready to go"? Some devices I've seen advertised spec out as so many Ω and such-and-such power (e.g., 500W). The tool I have in mind is 4.3 load amps (500W).

To be clear, I'm imagining something I simply plug into and that has a rotary control on it. A suggestion and weblink to a vendor would be excellent.

Any help is appreciated.

 

[crutschow]

If you Google "motor speed controller" you will get many hits. Just pick one that can handle at least as much current as your motor draws.

 

[nsklavos]

Google "Router Speed Control", there are a lot of them out there that can handle up to 20 amps and would work with you application.

 

[TommyC]

The reply by crutschow wasn't very helpful. I did Google "motor speed controller" and the list was fairly generic and nothing popped out on several pages that came close to what I was looking for.

Per the advice by nsklavos, I Googled "Router Speed Control" and came up with 5 or 6 links that took me to exactly where I wanted to go! Who knew that the controller I was looking for appears to be in demand for woodworkers who want to reduce router rpm? I happen to have a router on a shaper table and it never occurred to me that a reduced speed could be of any advantage.

Anyway, in my latter search, I found any number of devices that should do the trick for my die grinder. The one from Harbor Freight is good for 15a and costs only $20. Sweet.