Refers to the variety of diamond disc and CBN model. Diamond is currently divided into two categories according to the source: natural diamond and synthetic diamond. Also according to the different requirements and characteristics of the binding agent, or into a variety of different according to the shape of the abrasive treatment. Resin bond synthetic diamond abrasive is generally used, it was mostly flakiness, low intensity, polishing wheels, rough surface, but the low price; CBN selection of medium intensity and surface metallization clothing varieties.

Refers to the abrasive particle size, stainless steel cutting wheel particle size marker used. According to the requirements of abrasive used, the use of sieving and water into the legal system selected a variety of different thickness granularity. Coarse particle size 40μm, multi-use screening method, according to their size into 25 granularity, denoted as:

Narrow range: 16/18 to 325/400 width range: 16/20 to 60/80
Each particle size range of basic grains group size ranges, each basic particle swarm is two adjacent mesh sieve to determine the nominal size. Of fine particle size of 40μm, the use of sedimentation. Different size for different machining accuracy and roughness.