Stalagmite             Pin Drilling Machine Modification

How to drill accurate holes for Reversible-Pins:

This is a close up side view with the table pushed down and drill bit exposed. The center of the index pin should be 5/32" (.150 in.) (4 mm) from the center of the drill bit.

Here is a sectioned view of how the copper wire index pin works. The black arrow points to the row of holes which are drilled first in the center of each tooth. These holes will receive the glue-in die pins. The red arrow points to the second row of holes which will receive the plastic Reversible-Pins.

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