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Okuma America Corporation
MACHINE DEFINITIONMACHINE DEFINITION
MACHINE DEFINITIONMACHINE DEFINITION
MACHINE DEFINITION
Rev. 8-21-01
GRINDERGRINDER
GRINDERGRINDER
GRINDER
A grinder is a machine tool that employs a rotating abrasive wheel instead of a cutting tool.
The purpose of grinding is to leave a finely finished surface on the metal and at the same
time to remove the small amount of stock left after the previous finishing operation has
brought the piece almost to size.
On Okuma grinders there are two types of coordinate systems. One is a work coordinate
system for grinding and the other is a wheel coordinate system for wheel dressing.
The work coordinate system is based on the workpiece. For external grinding, the origins
of the work coordinate system is located at the end point of the center on the headstock.
See figure 3-6.
For internal grinding, the origin is similar to that of lathes. The center of the chuck
holding the workpiece is the origin. See figure 3-7.
The origins of the wheel coordinate system is referenced to the grinding wheel itself for
both OD and ID grinding. See figure 3-8.
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