Changing sandpaper on a Black and Decker belt sander requires using the correct width for your sander. Slide the old sandpaper belt off the belt sander front and rear rollers. Look for the arrows on the inside of the new sandpaper belt and the arrow on the side of the belt sander.
Slide the old sandpaper belt off the belt sander front and rear rollers. Pull off the old belt and put on a new one, making sure that the arrow stamped on the inside of the belt points in the same direction as the belt travels when the sander is in operation. The last cause for the belt sander belt keeps slipping problem is the tension lever problem of the sander.