A belt/disc sander is used to roughly sand off edges of wood. This is great for fixing up curved edges that you may have cut off from the band saw. The belt portion of the sander features a rectangular belt that spins downward. The disc portion is a discs shaped sanding pad that rotates, allowing you to sand on the half that is spinning downwards. The disc offers more variation in sanding speed, and the belt provides a more constant sanding speed.
Models at EXP
Jet Oscillating Spindle Sander (x1)
JET JSG-96: Has a 9″ disc and 6″ wide belt