03-16-2014, 09:42 AM
It's been a while since I've run a grinder, but let's see what I can dig up...
First of all, you are going the wrong way with the hardness. Burning streaks mean the wheel is loading up rather than breaking down and needs to be softer, not harder. Try an F or G 60 grit wheel.
I would also move the wheel MUCH more than .050". Creeping over a little at a time like than heats the chuck locally and causes distortion. Moving over 1/2 to 3/4 the width of the wheel per pass with a .0001" depth should give better results. Follow up with a similar pass at zero depth and let it "spark out". The chuck should be barely warm when you are done.
Tom
First of all, you are going the wrong way with the hardness. Burning streaks mean the wheel is loading up rather than breaking down and needs to be softer, not harder. Try an F or G 60 grit wheel.
I would also move the wheel MUCH more than .050". Creeping over a little at a time like than heats the chuck locally and causes distortion. Moving over 1/2 to 3/4 the width of the wheel per pass with a .0001" depth should give better results. Follow up with a similar pass at zero depth and let it "spark out". The chuck should be barely warm when you are done.
Tom
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