A Grinding wheel is an expandable wheel that is composed of an abrasive compound. It is used for various grinding and abrasive machining operations.
Grinding wheels and other bonded abrasives have two major components-the abrasive grains that do the actual cutting and the bond that holds the grains together and supports them while they cut.
The percentages of grain and bond and their spacing in the wheel determine the wheel's structure. The particular abrasive used in a wheel is chosen based on the way it will interact with the work material