Indexing Drill Jig

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Indexing jig is used to drill holes which are spaced equally along a circle. In this example four equally spaced holes are to be drilled on the periphery of the workpiece. The workpiece has a machined bore. The workpiece is located by a C-washer and a nut. A drill bush is fitted in the bush plate. the drill is fed through the bush to drill the first hole. After this, by rotating the hand wheel, the workpiece is indexed for drilling the next hole. The indexing is done with the help of an index plate and an indexing device.