As a general rule most wheels are Aluminium Oxide, good for HSS / MS / carbon steel. they can be identified by the blotter marking… A-C followed by – Grain -Grade-structure- bond.

​A – Usually grey/ white, can be pink, – Hard

​C – Carbide, usually green – soft – for carbide tooling, tig welding tips, but has other uses too.

George.

Edited By mechman48 on 16/02/2017 17:50:03

I run one general grey carborundum wheel for general grinding and roughing and one soft white wheel for finishing up on tools.

These are 8" wheels on a 8" grinder but on the side of the white wheel i have a blotter and a thin diamond face wheel that I use for grinding carbide cutters, face only as you can only get to it face on but it's main use is to shorten damaged carbide end mills before they go on the end mill grinder to speed the job up.

Edited By John Stevenson on 17/02/2017 01:17:16