Is it Safe to grind aluminum, or not?
Grinding aluminum is best done with Coated abrasives. If you want to surface grind Aluminum with a wheel, I recommend you use a Silicon Carbide wheel such as 37C60JVK. If you want to utilize a segment on a blanchard grinder you have 2 choices: A vitrified bond such as 37C46IV or a resin bond such as 32AC60JB18 You should be able to achieve a 50 Ra or better.