I have an old Black and Decker 6" grinder that has served semi-OK for my pretty modest tool grinding needs. It has the standard grey wheels which I know aren't the best for tool grinding.
I want to get better at tool grinding (nowhere to go but up) and am going to get a new pair of grinding wheels. I will be grinding HSS toolbits and want to try making some modest tools with oil hardening drill rod and tool steel. These tools will be mostly 1/4" square and round and perhaps eventually just a little bigger up to perhaps 3/8".
(I probably need a larger grinder but the budget is tight right now).
I've done a lot of reading of the newsgroup archives and on the net and it appears that aluminum oxide wheels (white) are probably best for my application, in perhaps a 46 grit and a 60 grit
Any opinions would be gratefully accepted by this relative newbie.
jim