The Larick Model 220 features two counter-rotating spindles to be used with brush type sanding wheels. This allows parts to be sanded without noticeable rounding over on corners. The sanding technique is to sand the left corners on the right sander (CW rotation) and the right corners on the left sander (CCW rotation). This method has the brushes formed to the profile as they go over the corners.
The spindles move up or down together and are controlled by an air valve. Adjustable stops are used for positioning. In addition to the vertical spindle travel, the tabletop also moves back 2" when the spindles are raised. This provides support under the lower sanding head when sanding raised panels.