Pneumatic sander is a tool for grinding using pneumatic power, which is usually used for surface treatment and dressing of metal, wood, plastic and other materials. Its main working principle is to push the grinding head to rotate through the air pressure, so as to achieve the grinding and polishing of the workpiece surface. Compared with electric sanders, pneumatic sanders have higher power density and stronger grinding ability, and can complete more grinding work in a short time. In addition, due to the use of pneumatic power, the pneumatic sander generates less heat during use, which can better protect the workpiece surface and avoid deformation or damage caused by overheating. Therefore, pneumatic grinding machines are widely used in various industrial production and processing fields to provide users with efficient and accurate surface treatment solutions.