What is a Grinding Machine?

A grinding machine, often shortened to grinder, is one of power tools or machine tools used for grinding, it is a type of machining using an abrasive wheel as the cutting tool. Each grain of abrasive on the wheel's surface cuts a small chip from the workpiece via shear deformation......

A grinder is generally used to precisely shape and finish the given materials with low surface roughness and high surface quality. It is primarily a finishing operation that removes relatively small quantities of metal, to deliver highly accurate products. However, certain grinding applications also involve swiftly eliminating high volumes of metal.

It comprises of a bed with a fixed guide to hold the work piece; and a power driven wheel that spins at a predetermined speed. The head of the grinder can be set to move across a fixed work piece; or the work piece can be moved while the head remains in a stationary position. The position of the grind head or table can be fine controlled by using a hand wheel, or a computerized numeric controller.

It generate considerable amounts of heat; hence coolants are used to cool the work piece to avoid overheating, prevent accidents and maintain its tolerance. In some high accuracy grinding machines such as the hydraulic cylindrical grinders and surface grinders; the final processes generate relatively little heat; thus coolants are not needed as the temperature is tolerable.

Grinders can be used in engineering, electrical, automobile and many other industries. 

Article Source: Wikipedia