Sand belts belong to coated grinding tools, known as flexible grinding tools. Compared to solid grinding wheels, polishing with grinding tools is more flexible and safe, with higher accuracy and lower grinding costs.
Sand belt grinding is a form of grinding with coated abrasive tools (commonly known as sandpaper, sanding cloth). As early as 1760, sandpaper appeared in the world, but at that time it was only limited to manual operation. It was not until 1900 to 1910 that the era of mechanical use of sandpaper and sanding cloth entered, and it was first applied to the wood industry in a circular belt shape. This mechanical grinding method using circular belt shaped sanding cloth was the prototype of sanding belt grinding. After 1930, sand belt grinding gradually developed towards metal processing. During World War II, the United States was the first to use sand belt grinding in weapon manufacturing and achieved significant results. In the early 1950s, the emergence of electrostatic sand planting methods pushed sand belt grinding to a new stage, and the application of sand belt grinding gradually became widespread. Later, Europe and Japan also carried out research and application of sand belt grinding technology, and sand belt grinding technology gradually developed into an independent processing technology field with a complete range of categories and a relatively complete technical system.
Composition of sand belt

Sand belt is a belt shaped tool made by bonding abrasives to flexible materials such as paper and cloth using adhesives, which can be used for grinding and polishing. It is a main form of coated grinding tools. Its basic components are: substrate, abrasive, and binder, collectively known as the three elements of sand belt.