Belt machine

A belt machine is like a giant pencil sharpener, but instead of pencils, it sharpens metal or wood pieces, like knives or saw blades. The belt machine has a belt that moves really fast around two wheels, and the metal or wood piece is pressed against the belt. The belt spins and grinds against the metal or wood, which makes it sharp. Imagine if you rubbed a pencil really fast against a piece of sandpaper- that's kind of what's happening in the belt machine. The belt machine is used in places like factories or workshops where people need to sharpen lots of things quickly and efficiently.