Quote:
Originally Posted by Cash4587
I could be wrong, (please somebody correct me if I am) but I am pretty sure you are not supposed to grind aluminum with that type of abrasive disc. Grinding aluminum can gum those up and cause them to explode like that because it gets in the pores of the disc and causes it to expand. Then again, somebody please correct me if I am wrong.
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While you are right, this doesn't look like a fiber based grinding wheel. To me it looks like a stamped metal wheel with some kind of coating such as carbide or diamond.
Similar to this.