METALLOGRAPHIIC SAMPLE GRIINDER//POLIISHER METALLOGRAPH C SAMPLE GR NDER POL SHER MODEL: MPDM200//250E MODEL: MPDM200 250E Applications: MPDM Metallographic grinding/polishing machine is designed and manufactured on the basis of international advanced metallographic sample preparation methods and sample preparation conditions, which is equipped with a beautiful and practical FRP shell, all stainless steel standard parts without rusty. This machine is a ideal sample preparation equipment for factory, scientific research institution , colleges and universities laboratory. Features  Double wheel grinding and polishing machine  The rotation speed of two grinding discs can be set separately  It can be used by two people at the same time and used for grinding and polishing respectively Specification: Model Diameter of grinding and polishing disc: (step-less speed changed by knob) (step-less speed changed by knob) Speed of grinding and polishing disc Grinding and polishing disc rotation: Input voltage clockwise or counterclockwise adjustable Single-phase Constant speed setting 150 r/min, 300 r/min, 600 r/min, 1000 r/min (four-level constant speed) Input power