Grit
CS-HD
Harder stone than CS-M, excellent for hardened steel, 47-63Rc
Compared to the CS or CS-M, the CS-HD is harder acting and slower to break down. It can be used to polish even the hardest die and mold steels. Polishers claim excellent results when finishing dies ranging in hardness for 47 to 63 Rc. Some mold makers also use CS-HD for removal of EDM.
Silicon Carbide
Grits: 120-1200
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