Also known as bonded abrasives, the grinding wheel is a bonded abrasive that consolidates ordinary abrasives into a certain shape (mostly circular, with a through hole in the center) and has a certain strength. It is generally composed of abrasive, bonding agent and pores, which are often referred to as the three elements of fixed abrasive tools. According to the different classification of the binder, the common ones are ceramic (binder) grinding wheel, resin (binder) grinding wheel, rubber (binder) grinding wheel. Grinding wheel is the largest amount of grinding tools, the use of the most widely, when used in high-speed rotation, can be on the metal or non-metal workpiece of the outer circle, inner circle, plane and various types of surface, such as rough grinding, semi-fine grinding and fine grinding and grooving and cutting.

There are many kinds of grinding wheels. According to the abrasive used, it can be divided into ordinary abrasive (corundum and silicon carbide, etc.) grinding wheel and natural abrasive superhard abrasive and (diamond and cubic boron nitride, etc.) grinding wheel. According to the shape, it can be divided into flat grinding wheel, bevel grinding wheel, cylindrical grinding wheel, cup grinding wheel, disc grinding wheel, etc. According to the binder, it can be divided into ceramic grinding wheel, resin grinding wheel, rubber grinding wheel, metal grinding wheel, etc. The characteristic parameters of the grinding wheel are mainly abrasive, particle size, hardness, bonding agent, shape, size and so on. Since the grinding wheel usually works at high speed, a rotary test (to ensure that the grinding wheel will not break at the working speed) and a static balance test (to prevent machine vibration during work) should be carried out before use. After working for a period of time, the grinding wheel should be dressed to restore grinding performance and correct geometry. [1]