• Mayuresh Mestry
• Nikhil Mantry
• Vinay Sawant
• Himesh Kale
• Majid Shaikh

Since the invention of electric drill in 1889, the drilling mechanism has undergoing tremendous modifications over the past few decades. With the increasing complexity in design of various industrial components, the drilling processes has to be upgraded to meet the new requirements. A simple technique for achieving this without much investment was to develop drill attachments. But for more precise control and close tolerances, a specialized drill jig has to be developed based on the component to be machined. An example of such a complex component is the Hydraulic Door Closer. The holes provided in the door closer housing body needs to be drilled internally and cannot protrude out of the external surface of the housing body. Such a restriction makes it necessary for a specialized tool or jig to serve for this purpose. Thus we have used the door closer housing body and developed a jig that can provide internal holes of minute diameter in the walls of the compact circular bore of the door closer housing body. This improved jig has been designed to provide holes with much more accuracy, closer tolerances and better surface finish to eliminate any further machining done onto the bore to clear the damages caused by the drilling tool currently being used to carry out this operation. The application of this jig is not just restricted to door closer but can be incorporated in various other industrial applications, with a few minor modifications.

Punch, Press, Drilling, Jig, Door closer, Circular profile, Compact space.

"DEVELOPING A METHOD FOR PRODUCING HOLE OVER CIRCULAR PROFILE OF DOOR CLOSER HOUSING BODY", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 3, page no.109-114, March-2019, Available :http://www.jetir.org/papers/JETIRAS06020.pdf

"DEVELOPING A METHOD FOR PRODUCING HOLE OVER CIRCULAR PROFILE OF DOOR CLOSER HOUSING BODY", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 3, page no. pp109-114, March-2019, Available at : http://www.jetir.org/papers/JETIRAS06020.pdf