True Variable Speed Grinding
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True Variable Speed Grinding
I bought a four wheel grinder off craigslist. It was a DIY critter using healthy shafts, pillow blocks and a 240 volt 3,400 RPM motor to push it. As luck would have it, I scored a 3/4 horse sewing machine motor and controller, so replaced the 240 volt monster with it. Now it runs at from 0 to 2,400 RPM.
The variable speeds make using it for sharpening much easier, because I can slow it enough I don't have to worry as much about overheating the steel of blades.
I usually run it around 500 RPM, but can crank it up to beat up on, for example, a mower blade or a chunk of iron.
I did install two CBN wheels on it and they have spoiled me, when sharpening high speed steel and such.
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- Stick486
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Re: True Variable Speed Grinding
What do you do for heat control?...KellyCraig wrote: ↑Tue Mar 26, 2024 12:38 am I did install two CBN wheels on it and they have spoiled me, when sharpening high speed steel and such.
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