pic: Angle Grinder Carnage

[asid61]

Originally Posted by Cash4587

I could be wrong, (please somebody correct me if I am) but I am pretty sure you are not supposed to grind aluminum with that type of abrasive disc. Grinding aluminum can gum those up and cause them to explode like that because it gets in the pores of the disc and causes it to expand. Then again, somebody please correct me if I am wrong.

I learned of this phenomenon on regular bench grinder and surface grinders, but I've (thankfully) never seen it happen. I heard that the aluminum gums it up, causing it to just rub and not cut, heat up, and explode.
In any case you might want to invest in a decent bandsaw for aluminum cutting. Easy and versatile.