The main role of the belt sander is to polish the surface of the parts 
1, abrasive belt grinding is a high-speed rotating abrasive belt with a certain pressure and the work surface contact, produce relative friction, so as to grind the workpiece processing, widely used in metal and non-metal made of a variety of parts of the surface grinding.
2、It can complete the whole process from blank to semi-machining and even finishing at one time, which is an emerging processing technology with a wide range of applications. Belt sander improves the work efficiency 6-15 times than the common sander, saves two-thirds of the loss than the common sander, has the advantages of high speed, high efficiency, safety and economy, the belt sander has a wide range of use, is recognised as the second generation of the new products in foreign countries, it is the ideal product for replacing the sander and the disc polishing.