I went to a liquidation of a machine shop today and bought a lot of grinding wheels. About 500 lbs of new grinding wheels. About half are 8 inch wheels. Mostly pink, some gray. Mostly one inch thick and some 2.75 inches thick. All of the 8 inch wheels have 7/8 arbor holes. Then there are about 100 lbs of small 3 and 4 inch wheels. Not sure how to tell what grit they are or why the color difference. Help. A primer of grinding wheels please?
Almost al of the wheels are from Norton, if that makes a difference.