[SEL] NPT taps

[MARVIN HEDBERG]

about 2/3 to 3/4 of the threads deep, leave 1/3 to 1/4 of the threads
showing. test with a pipe plug.
on steel, i use cutting oil, on cast iron, i do it dry.
be sure to use a 1/4 turn advance-1/3 turn back motion when taping.
if you keep taping continually without the forward and back motion on the
tap handle, the tap will plug with chips and break. there is no warning
either :-))


marv in minn


>   Howdy list.  It was a good one here and we had a White Christmas.  13
> above now with little snow...jus perfect.
>   Well for Christmas, I got a set of NPT taps.  Question I've had for a
> long
> time is "How far do you turn a pipe thread tap in?"  Usually on a die I
> turn
> it until 2 threads are showing.
>
>
>   HELP
>
> RickinMt.
> http://community.webshots.com/user/stroberc
> _______________________________________________
> SEL mailing list
> SEL at lists.stationary-engine.com
> http://www.stationary-engine.com/mailman/listinfo/sel
>