I kept everything tight and tapped the 8-32 hole including the jig using only a starting tap. This allowed for the grub screw to jam nicely into the bottom of the thread taper. Every few truns of the tap I removed it and blew out the hole with canned compressed air. I kept testing the depth with the grub screw until it jammed just below the surface of the gear/spindle. into the tapered bottom of the hole.
Uploaded by "Bill Hancox" on 18/03/2014 23:54:50
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