The unique characteristics of superhard abrasive. A diamond grinding wheel, for example, it refers to the percentage of the corresponding wheel of the diamond layer included in each cubic centimeter volume of diamond quality. The concentration of diamond abrasive is 100% base value equal to 0.88g/cm3 (4.4 克拉 / cm3); When the diamond when the density is 3.52 g/cm3, (CBN density of 3.47 g/cm3), this value woodworking saw blade corresponds to the volume of 25%, all other concentrations were calculated this ratio shown in Table 1.

Volume percent concentration in a depressed center cutting wheel simple linear relationship:
V = 0.88c / γ where:
V - volume, cm3;
c - concentration,%;
γ - abrasive density (generally the diamond is 3.52g/cm3, CBN is 3.47g/cm3).
The density of the diamond into the formula, V (%) is the concentration c (%) of l / 4, i.e.,
V = 0.25c