In response to the tutorial in the last issue
on tap & die, reader Craig
shared these additional tips:
That’s a good tutorial on threading.
thing 1….hss [high-speed] steel taps survive much longer.
thing 2…i make threading solution from 3in1 and dry graphite lock lube and have done so since the 60s
thing 2a…aluminum and brass are sticky, you really need to use a lube
thing 3…you can thread HARD wood with metal taps
thing3a…i use pipe taps and dies for large plastic and wood threading
thing 3b…in plywood or pine that i’m going to thread, i drizzle CA or epoxy into my hole, let it set, then thread it…that makes the soft wood hard (so does styrene-based wood hardener)
thing 4…if you can’t find a bottoming tap you can grind off the taper of a regular tap
thing 5…even though tap and die wrenches are preferred, crescent wrenches and vise grips work in a pinch