Centerless grinding is a manufacturing process. It helps solve limitations of other types of turning machines. The process is one in which material is removed from components by means of abrasive grinding.
No spindle is used in centerless grinding.Instead, the workpiece is secured between a pair of rotary grinding wheels that rotate at pre-set speeds. This determines the speed at which excess material is removed
Forms of Centerless Grinding
Thru-feed, In thru-feed centerless OD grinding the workpiece passes between two wheels, a grinding wheel and a regulating wheel. Both wheels rotate in the same direction, but at much different speeds. The purpose of the grinding wheel is to remove material from the workpiece and improve part OD quality. The regulating wheel acts like a brake, controlling the rotational speed and thrufeed rate of the workpeice.
In-Feed, In-feed centerless grinding is used to grind workpieces with relatively complex shapes, such as an hourglass shape. The workpiece is loaded manually into the grinding machine and the regulating wheel is moved into place.
End-Feed, In end-feed centerless grinding, the workpiece is fed axially into the machine on one side and comes to rest against an end stop; the grinding operation is performed, and then the workpiece is fed in the opposite direction to exit the machine.