1:Polishing discs are divided into coarse, fine, hard, soft, astringent, thin, thick, large, small
2:Coarse sponge disc, strong cutting force, strong grinding force, weak leveling force, easy to produce swirl marks, suitable for heavy grinding use (strong cutting force and good leveling, easy to produce swirl marks, disc surface good cleaning)
3: soft surface of the sponge disk, cutting force is weak, grinding force is weak, flat force is strong, (weaker cutting force and good flatness, rarely produce swirl wheel, the disk surface is good cleaning)
4: wool disc, better heat, cutting power, strong cutting power, poor leveling power, disc surface cleaning is poor
5: rabbit wool plate, phosphorus sheet coarser, strong cutting force, easy to overheat the whirlpool wheel, the plate surface is difficult to clean