The grinding tools for mechanical grinding are generally circular grinding discs;

The material of the grinding disc for mechanical grinding is usually cast iron, while the polishing disc is made of steel or copper. Felt-faced and silk-faced discs are commonly used for polishing hard alloy, copper alloy, stainless steel, and other sealing rings.

The surface of the metal grinding disc must be flat and flawless, with a flatness that needs to be adjusted to below 0.05/1000mm. The radius of the disc should be designed to be at least twice the diameter of the workpiece being processed. Its diameter range is generally 305~1620mm (16~64in), and the thickness is roughly 1/10~1/6 of the diameter. The disc surface is grooved, with the purpose of reducing stress deformation on the disc surface, facilitating heat dissipation, and facilitating the removal of waste abrasives and accommodating grinding debris during grinding.

Surface radioactivity and diamond blocks are mostly used for rough grinding, while concentric circles are primarily used for fine grinding. End face threads (Archimedean spiral) are often used for polishing.

The grinding machine is a grinding equipment used in the mechanical seal manufacturing industry. It consists of a bed frame, a base, a reduction gearbox, a grinding disc, a control ring (also known as a retaining ring or a correction ring), a limit support frame, etc.

During grinding, the workpiece is placed inside the control ring, and a plastic isolation ring is used to evenly distribute the workpiece within the control ring. Grinding pressure is applied through a weight. When the grinding disc rotates, the control ring rotates within the limit support frame. In addition to its own rotation, the workpiece also revolves around the grinding disc along with the control ring. Under the action of the abrasive, the surface is continuously ground.