Why go to all that bother when this little thingy does the job very adequately, it can even take a few different sized very small taps as well. Make sure that you get one of them that has 4 jaws to grip the taps correctly. It even has a swivel on the top, so you can hold it with one finger to keep it upright, this stops the tap from trying to start at crazy angles and breaking the very small taps. :-)
If you're going to make tap wrenches for small taps, you're well advised to incorporate a guide pin into the design. Without one, it's just too easy to bend the delicate tap and snap it. In my article on the subject...
I point out that, at least here in the USA, the tiny taps have the same size shank, and so a single hole and a setscrew is all that's needed to secure them. For odd size shanks, I show several other designs including one with collets of a sort.
Home Shop Freeware
No different than golfing, fishing, drinkin' or chasing women, it's all just a big damn waste of time and effort......... just stupid ........ unless it was fun enough to do it again next week.
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