07-05-2015, 01:20 PM
Look for the white aluminum oxide wheels, from Norton (St.Gobain) the grade is 38A. They are the most commonly used ones on hardened HSS. Very free cutting and friable, they do break down and need to be dressed more often than the gray 32A or 32AA aluminum oxide, but they rarely burn work.
One caution is wheelspeed. Many grinding wheels are rated to 3600 rpm, though in smaller diameters that should be higher.
Grit size, start with 46, have a 60 on hand. For extra fine finishing an 80 grit might be good, though I rarely need to use that fine a grit.
HTH
Ken
One caution is wheelspeed. Many grinding wheels are rated to 3600 rpm, though in smaller diameters that should be higher.
Grit size, start with 46, have a 60 on hand. For extra fine finishing an 80 grit might be good, though I rarely need to use that fine a grit.
HTH
Ken