During the process of preparation of metallographic sample, the grinding and polishing of sample are the two very important processes, usually adopts two kinds of apparatus: metallographic sample grinding machine and metallographic sample polishing machine; In order to meet the development demands of industry and science and technology of our country, combine users' instructions, our company newly designs and produces YMP-2A model double speed metallographic sample grinding and polishing machine. This machine appearance is novel and esthetic, filth collect dish and cover are wholly made up of glass fiber reinforced plastic. This machine is durable in use, it is extremely convenient to safeguard and maintain; can finish every processes such as rough rubbing, fine rubbing, dry rubbing, wet rubbing, and polishing of various samples; in order to expand preparation demands of different samples, the diameter of grinding dish and polishing dish of this machine is greater than the domestic same products’. There are more choices of different linear velocity on the working range, can increase 20-30% of effective working range, can improve the grinding and polishing quality of samples, and this machine rotates steadily, the noise is low, it is an ideal and perfect metallographic sample making machine with complete functions. Main parameters Grinding and Polishing Wheel Diameter: 230mm Abrasive Paper Diameter: 230mm Platen Speed: 500r/min, 1000r/min Electromotor: YSD802-8/4, 0.25/0.37KW，380V Total Dimension: 420x623x310mm Net Weight: 35kg