Uses for a bench grinder?

I got another now so i will turn the other one into a buffing machine. This one is a half a bench sander. I just used the sander to sand down the blade on a new knife it wasn’t locking that good. So i sanded the back ebnd of the blade down. Its so quick! That would would have taken ages by hand. The blade now has a little play it was to quick for me lol still more then acceptable.

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I need to buy some higher grit belts for this if any one knows any sources i will have to buy from America i think. The size is 50mm x 686mm sanding belt.

This may be a silly question but has any wide ever bough wider belts and try to cut them in half? If i can find the right length.

No, cutting belts is not good idea.
You should find local 3M dealer. They receive belts as 600mm wide roll and cut them in any width you need.