The metal bonds used by grinding wheels are typically made by sintering powdered metals along with filler materials, and adding an abrasive such as CBN or diamond. These bonds are very strong, providing a grinding wheel that holds its shape well.
The bond of grinding wheel is for the purpose of holding the abrasive grains of cutting edges. It is also to withstand a grinding force and rotary stress and simultaneously need characters to generate the abrasive grains adequately in accordance with the increase of grinding force by abrasive grain wear.