Re: Bench Grinder
Fine grain aluminum oxide for HSS cutters. "green" Silicon Carbide for carbide cutters.
And keep the green stone for carbide only, the aluminum oxide wheel for HSS only.
Tin can full of water close at hand so you can keep the temperature down and not take the temper out/soften the cutter.
To get rid on microscopic scratches from the wheel, a diamond hone is a good idea to lap the cutters after sharpening and before use.
Machinery's Handbook can also tell you about the importance of chip breakers and other sharpening tricks.