JMQ-12 low-speed precision cutting machine is mainly used to cut small cylindrical, square metal bodies or electronic circuit board materials. The machine uses weight blocks to load constant cutting force to automatically cut and stops automatically after cutting is completed. Using a micrometer device, the thickness of the sample cutting can be adjusted to achieve precise cutting. It can be used as a supporting sample preparation equipment for transmission electron microscopy. The equipment has a controllable speed and is equipped with a safe and transparent protective cover; in order to avoid burning the sample due to overheating during cutting, the diamond cutting blade rotates to bring out cooling water during the cutting process, so that the cutting blade and sample material are cooled. The surface of the sample is bright, flat, and free of burns. It is an excellent equipment for cutting small materials and electronic circuit boards.