The original imported QATM single disc automatic metallographic polishing machine SAPHIR 550 from Germany is a new generation single disc polishing machine with Rubin 540 polishing power head, especially suitable for preparing pressure sensitive samples and microelectronic component samples. The diameter of the working disc is 200-300 mm. Its powerful speed controlled drive can withstand greater pressure. Rubin 540 grinding and polishing power head is equipped with a Parallel transport exposed sample clamp, a grinding device that can rotate clockwise/counterclockwise, and move at a variable speed in the entire working area. Pressing samples with their own weight ensures the gentle preparation of pressure sensitive and precise samples. The impact resistant plastic inner cover, aluminum outer cover with powder coating, and high standard technology of the equipment provide necessary conditions for its quiet and smooth operation. It is an ideal model for preparing metallographic samples of pressure sensitive and microelectronic materials.