In the preparation process of metallographic specimens, polishing of the specimens is a major process. After polishing on a polishing machine, the polished specimens can obtain a mirror like surface.PG-2DThe metallographic sample polishing machine is a classic product with dual disc independent operation, different speeds, and a cabinet structure for convenient storage of various consumables. It is equipped with a polishing water supply system and a drawer style dirt collection box that is easy to clean. It has the advantages of smooth transmission, low noise, and easy operation and maintenance. The polishing disc diameter is large and suitable for polishing requirements of various materials.