Pipe threads would be rough on a lathe - having to do it on a taper
and having the cutter perpendicular to the face.

Martin

Martin H. Eastburn
@ home at Lions' Lair with our computer lionslair at consolidated dot net
TSRA, Endowed; NRA LOH & Patron Member, Golden Eagle, Patriot's Medal.
NRA Second Amendment Task Force Charter Founder
IHMSA and NRA Metallic Silhouette maker & member.
http://lufkinced.com/


BillM wrote:
1/8" NPT threads, shotgun cleaning rods, the
copper pipe on Victor torch rosebuds
are the 27 TPI applications I've run into.
No idea where it actually originated. My South
Bend won't do it. I'm sure some lathes
will, I just haven't seen one.

Bill




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