The first is sand belt model selection, different workpiece material, different shapes, different ways of the grinding belt should different sand belt model. Belt model selection mainly consider substrate category, abrasive materials, kind of binder, belt fitting way. Belt models generally are selected qualified personnel. Second granularity selection, only choose the right belt granularity, it can ensure the quality of the workpiece surface, it also can influence the life of sand belt. The third is the direction of rotation, when using the overlapped sand belt, make the running direction of the tape same with the sign on the back of sand belt, otherwise belt easy to premature fracture in the course.
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