The polishing machine can generally be defined as surface roughing, the polishing machine is finishing, the polishing machine is generally simple, such as the general hand grinding wheel, etc. The polishing machine has high processing requirements, so the mechanical precision is higher than the polishing machine, and the attachment device is also Complex, it is generally believed that the difference in use is not obvious, but for those who specialize in the grinding industry, the surface roughness is quite different, that is, the smoothness is out of line.