Grinding and Sharpening D2: Belt Recommendations & Technique

D2’s heavy chromium and vanadium carbide load, the same feature that gives it excellent wear resistance, makes it one of the more demanding tool steels to grind and sharpen. It sits alongside high-carbide CPM steels like CPM 20CV and CPM S30V in terms of belt and abrasive demand, despite not being a modern powder-metallurgy steel.

Belt Selection

Ceramic belts are the clear choice for stock removal on D2, the same recommendation that applies to other high-carbide steels. Zirconia belts are a reasonable step down if ceramic is not available, but expect faster wear and slower cutting.

Grit Progression

Technique

Run at a moderate belt speed with light, controlled passes rather than heavy pressure, which generates excess heat and risks drawing the temper. A generous coolant mister or frequent water dips help prevent overheating, since D2’s demanding heat treat means preserving the temper during grinding matters more than on tougher, simpler steels.

Sharpening

Diamond stones are the clear recommendation for sharpening D2. Standard aluminum oxide or Arkansas stones struggle to cut its carbide structure efficiently. A practical progression starts coarse, around 220-400 grit, for reprofiling or fixing a dull edge, then moves to 600-1000 grit for refining, with light lubricant to help manage heat throughout.