abrasive wheels

The abrasive wheel is a multi-point precision tool. It is composed of abrasive grains held together by a bond matrix and separated by pores. These pores are empty spaces between adjacent abrasive grains and the bond and serve to provide space for penetration into the material and a greater cooling action of the coolant so that the removed material and the heat generated by the machining process can be removed.

When the wheel is in use, the abrasive grains cut the material being worked, removing it in small parts (chips). Under the action of the force applied by the wheel to the workpiece, the abrasive grains tend to round off, thus losing their cutting ability. Simultaneously, the increase in friction causes heat buildup, which leads to the breakage of the abrasive grain or the failure of the bond bridge holding the abrasive grain; by releasing the latter, the underlying grains are exposed, which, thanks to their high sharpness, restore the initial conditions of good cutting with reduced effort.

This delicate balance is the basis for the correct execution of the grinding process.