Indexing jigs are used to accurately space holes or other machined areas around a Part. To do this, the jig uses either the part itself or a reference plate and a plunger. Larger

Indexing jigs are called rotary jigs

• In a pre-machined hollow metallic disc six equispaced blind holes have to be drilled radially as indicated in Fig
• Design the configuration and working method of the fixture or jig for such drilling work in a batch production.
• Design – The proposed design is schematically shown in Fig. Since the machining requirement is drilling where the tool will essentially need guidance, a jig has to be designed
• It is required to produce equi-angular spaced holes by drilling an indexing system has to be considered
• The indexing work can be accomplished by indexing the jig, holding the job clamped inside, manually by bringing the desired hole axis aligned with the fixed drill axis by manual adjustment.
• Six bushes are fitted equispaced in the jig. The design of the jig is schematically shown in Fig. The same work could be done by indexing the workpiece only within the fixed jig having only one bush.