Many different types of wheel, and a variety of shapes and sizes due to the different abrasive wheels, the wheel bond materials and manufacturing processes, different kinds of grinding wheels on the performance. Each wheel according to its own characteristics, has a certain scope. Therefore, grinding, must be based on the specific circumstances, the choice of the appropriate wheel. Otherwise they will be directly affected by improper wheel to select the machining accuracy, surface roughness and production efficiency. The basic principle of the wheel choice listed below for reference.