SM-5BManual Arm Polishing Machine is applicable to (rough & fine ) grind and polish the surface of natural & artifical stone slab,gravestone,etc. The machine can automatically move up and down through its electric elevating system. The structure and operation system of machine is very simple, and thus easy to operate. Technical Data: Grindingdiscs diameter 4''(100)-10''(250mm) Gyro Radius 650x3000mm Maximum vertical stroke 520mm Gross Power 5.87Kw Elevation method Electric Shipping Weight 900kg Overall Dimension 3200x750x1320mm