A fixture is a device for holding a workpiece during machining operations.The name is deviced from the fact that a fixture is always fastened to a machine of bench in a fixed position. Many machining operations can be performed by clamping the workpience to the machine table without using a fixture,espacially when a few parts are to be machined.However when the number of parts is large enough to justify its cost, a fixture is used for holding lacating the work Further,When the profile of the Component is not regular or when machining has to be done w.r.t. a reference face or bore,application of fixture will be necessary.