Features Conveyor belts in PVC. Catch trays at both ends. Shifting speed by Clutch Commutator and Chain Wheel wears well. Driving by Chain Wheel avoids conveyer belt slip. Gear driving in oil bath enables heavy duty operation. Scrapers can be removed without tools conveniently for cleaning. The machine can be operated by both manual lever and footboard. Conveyor table could be lifted up for space-saving when not in operation. SM-620A: With touch screen. SM-63OS:ETL & ETLS approval.