My thought on this, is "Who needs a tapered thread?" My answer is
"Pipefitters". When I was a pipefitter, I had a nice tripod vise and a set
of pipe dies. I still have 'em, but haven't used 'em for 50 years.
Plumbing has advanced.
Mert
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-----Original Message-----
From: 7x12minilathe@...
[mailto:7x12minilathe@...]On Behalf Of john baird
Sent: Friday, November 09, 2012 7:02 AM
To: 7x12minilathe@...
Subject: Re: [7x12minilathe] Re: Pipe threading on a mini lathe ?
A pipe threading machine cuts rough taper threads, because that is all that
is required to join pipes to fittings,it cuts fast and in one pass.
A machine taper thread is a totally different animal.
To cut pipe threads in a lathe is not practical.
1- the pass through of the spindle bore
2- supporting and stabilising the free end of the pipe
Regards jb
--- On Thu, 8/11/12, andyf1108 <andyf.1108@...> wrote:
--- In 7x12minilathe@...,
"olduhfguy" <phbrush@...> wrote:
I have seen a couple of articles on a taper turning
attachment for a mini lathe. It appears the makers are using
it primarily to make Morse taper shanks. Is this the only
acceptable way to cut tapered (NPT) pipe threads ? If that
is the case I would be better off to stick with machines
that are designed to cut pipe threads, but I thought I would
ask since the quality that comes out of most threading
machines leaves something to be desired by machinists
standards. Thanks !
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