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Originally Posted by 5650duane
I will be porting a set of 289 heads shortly! Have been away from this stuff for many years and trying to get back into it.Anyway I have purchased a geo600 makita die grinder and a porting kit is on the way. In the earlier posting it stated I need a "variac".Is that like a reostat of sorts to slow the speed of the grinder down? If so where do I find that? Thanks for the help!
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I'm not sure what a "variac" is but for electric grinders, you can't beat a foot pedal for infinate speed control. If you can't find one on E-bay or one made for grinders, you can get one from any sewing machine repair shop. As far as long burrs go, common sense will aleviate most problems and there is a limit to what a pencil grinder will reach or what you can see while using it. I haven't had any problems with any of my burrs or abrasives, outside of the cheapest Chinese crap you can imagine.
