"Wild_Bill" wrote in message
...
Also, being able to tap a hole slightly oversize, to accomodate SAE
fasteners in place of sloppy metric threads is handy.
I don't understand how tapped threads turn out grossly oversized on China
equipment, but it's fairly common, IME.



I threw away a whole set of Chinese taps a couple months ago because they
were all larger than their marked sizes.





--
WB
.........


wrote in message
...

I have, on occasion, re-tapped an existing hole for 1/8 pipe from 28
tpi to 27 tpi - use lots of dope!