In the preparation process of metallographic specimens, pre grinding of the specimen is an essential pre polishing process. Only after rough grinding, fine grinding, and precision grinding can the specimen be effectively polished.YM-2AThe metallographic specimen pre grinding machine is a classic product that can be operated by two people simultaneously. It is equipped with a wet grinding water supply system and has the advantages of smooth transmission, low noise, and easy operation and maintenance. The grinding disc diameter is large and suitable for pre grinding requirements of various materials.