Abrasives are divided into four main categories:
Compared to diamond, the hardness is the following:
The hardness must be adapted to materials grinded or sanded materials, hard abrasive materials for soft and vice versa.
These grains are available in the following granulometry:
16 - 24 - 36 - 40 - 50 - 60 - 80 - 100 - 120 - 150 - 180 - 220 - 240 - 280 - 320 - 360 - 400 - 500 - 600 - 800 - 1000 - 1200 and higher for high technology.
Resin: for abrasive and applied techniques.
Glue: for coated abrasives for use in hand.