22-44 Plus Drum Sander with Exclusive SandSmart" controlled infinitely variable feed rate from 0 to 10 feet per minute, gives the ultimate sanded finish and preventing machine overload \r\nSelf-cooling, precision-machined and balanced 5" x 22" extruded aluminum drum, Continuous-duty motor offers the advantages of heavier use for longer periods of time. Precision-flattened reinforced steel conveyor bed \r\nNo-give power feed conveyor belt \r\nZinc-plated steel tension rollers mount next to the drum. Drum height and downward pressure are adjustable, eliminating snipe \r\n1/16" per turn height adjustment \r\nHeight adjustment supported is by a thrust bearing for easy and smooth adjustments. Large, easy-to-use cast iron height adjustment handwheel allows both radical height changes and minute adjustments for extremely precise sanding thickness control.Minimal assembly required. Minimum of 400 CFM dust collection recommended \r\nPatented abrasive take-up fasteners for quick abrasive changes. Convenient on/off switch with overload protection mounted at front of machine base. Drum operates at 1,700 RPM. Drum ball bearings are sealed and permanently lubricated.