How do you sharpen hss drill bits?
HSS bits are best sharpened using a bench grinder. The trick is to ensure that the back edge is ground a little more than the cutting edge. Ensuring the cutting edge meets the metal rather that the bit riding on the non cutting surface and just polishing the metal. Ensure that both sides are ground evenly and that the original angle of the drill is maintained. Practise on some old bits before sharpening any expensive bits.
