Can I use the side of a cutting disc to grind away small burrs. Is it safe?

By using the side of a cutting disc as a grinder, you are grinding away at fiberglass matting in the side of the wheel where the reinforcing is, which is not a safe thing to do as it could cause a catastrophic wheel failure. Smith & ARROW do offer grinding wheels and also a “3 in 1” cutting, grinding, blending wheel that you can use for both cutting and grinding. Find this multi-disc here.