Abstract
Abstract: This paper focuses on fabrication aspects of automatic drilling & tapping machine and it describe the various components of the machine. This paper also focusses on working of automatic drilling & tapping. Our machine also suitable with the economical mass production with increased the productivity and accuracy. This is done by reducing the set up cost and manual fatigue. This machine is capable of performing both drilling and tapping operation with the help for speed reduction gear box. As drilling requires high RPM and tapping requires low RPM to perform the drill and internal threads operation. We know that for tapping we need to rotate the spindle in both direction so we use bevel gear arrangement for reversal of the spindle and also worm and worm gear is used for speed reduction as drilling requires high RPM and tapping requires low RPM to perform the drill and internal threads
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