1) Applying a sideways force (not just a torque)
to the tap. Often
by using a ppoor tap wrench
I suspect a tap extractor would work for case
(1), but the sort of
person to have a tap extractor is also the sort of person to use the
right tap wrench and apply an even torque to it.
Yes...but everyone makes mistakes occasionally. (Which is why tap
extractors find a market, I daresay.)
Of course. I suspect the machninist who's never broken a tap is like the
electornic engiener who's never blown a chop. Downright useless because
they've never done anything :-)
I've broken tools like drill bits and taps now and then. Most of them
As have I. One of the problems with small twist drills is that they screw
themselves into the workpiece when cutting, so if you don't feed them
fast enough they strech and break. Had that happn a couple of times
I find it very annoying that most companies that sell small (<2mm) taps
only sell them in sets of many sizes, and not individually. I know for a
fact I am going to break them from time to time, and I don't want to have
to replace the cet each time.
-tony