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machine grinding mix dry grinding usually

Apr 12, 2020· Norton 32A, or 32AA, or 5SG. Any of them are far better than aluminium oxide. 5SG ceramic is the best, stays sharp longer therefore grinds cooler. 32A is great for roughing off material, little more forgiving than 5SG. If you are looking for coarse grit (36 or so) go for the 32A, 60+ grits I …

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