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SAM 13
S
emi Automated Machine

Tapping Machine
This drill press was converted to a Tapping Machine for just one application, the tapping of 8-32 in 3/8" rod for the OSJ two piece element.

It is using a DC Gear Motor out of an old copy machine, PIC 16F84A and a Hall Effect magnetic sensor for counting the number of turns (threads).

A hole is drilled in the end of the 3/8" rod using a small lathe.

An air operated 5C collate to hold the 3/8 inch element for tapping.

A Special 8-32 tap made for tapping a non-through hole is used to put exactly 17 threads in both elements so a 1 inch set screw can attach the two halves of the element together.

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