Subject: Tap and die for acme threads?

From: [email-masked] (Chris Lesiak)
Date: 28 Jun 1996 15:20:49 GMT

I am having difficulty locating a tap and die for cutting acme threads.
I realize that most acme threads are cut on the lathe, but I find it hard to
believe that some specialty supplier does not sell a tap and die for
them.  Anyone have any pointers?

A related question: How do you go about cutting the internal threads
on a lathe (especially in a small diameter) ?

Chris Lesiak
[email-masked]

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From: PPIERCE <[email-masked]>
Date: Fri, 28 Jun 1996 08:49:43 -0700

> [email-masked]

Try calling MSC

Also check the FAQ

Paul in AJ AZ

Supplies, tools, etc.

MSC Industrial Supply Co.
Phone: 1-800-645-7270
FAX:   1-800-255-5067

Fantastic Service and Delivery

I ordered on Monday (FAX)
Received (in AZ) on Wednesday!

FAQ

FTP://Plains.uwyo.edu/metal/

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From: [email-masked] (Scott Logan)
Date: 28 Jun 1996 17:36:31 GMT

In article <[email-masked]>, From 
[email-masked] (Chris Lesiak), the following was written:
> I am having difficulty locating a tap and die for cutting acme 
> threads. I realize that most acme threads are cut on the lathe, but I 
> find it hard to believe that some specialty supplier does not sell a 
> tap and die for them.  Anyone have any pointers?

SOME Acme sizes are available from the usual suppliers, MSC, J&L, etc. 
For others, you may need to order one special-made.  Ask at the same
places.

> on a lathe (especially in a small diameter) ?

With a tap.  I've heard of some folks making a very small internal
threading tool, but it's not economical if you figure what your time is
worth.  

--
  ---------------------------------------------------
  From Scott Logan,
  http://ourworld.compuserve.com/homepages/LoganAct
  Reply to [email-masked]

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From: PPIERCE <[email-masked]>
Date: Fri, 28 Jun 1996 19:40:13 -0700

> For others, you may need to order one special-made.  Ask at the same

Just got the MSC sale book.  Page 31 has tandem (rough and finish on one shank) 
acme thread taps (rh or lh).

Maybe their BIG book has dies...

Paul in AJ AZ

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From: [email-masked] (Peter Drumm)
Date: 30 Jun 1996 00:29:46 GMT

In message <[email-masked]> - PPIERCE
<[email-masked]> writes:
:->
:->Scott Logan wrote:
:->> 
:->> In article <[email-masked]>, From
:->> [email-masked] (Chris Lesiak), the following was written:
:->> > I am having difficulty locating a tap and die for cutting acme
:->> > threads. I realize that most acme threads are cut on the lathe, but I
:->> > find it hard to believe that some specialty supplier does not sell a
:->> > tap and die for them.  Anyone have any pointers?
:->> 
:->> SOME Acme sizes are available from the usual suppliers, MSC, J&L, etc.
:->> For others, you may need to order one special-made.  Ask at the same
:->> places.
:->> 
:->
:->Just got the MSC sale book.  Page 31 has tandem (rough and finish on one shank) 
:->acme thread taps (rh or lh).
:->
:->Maybe their BIG book has dies...
:->
:->> > A related question: How do you go about cutting the internal threads
:->> > on a lathe (especially in a small diameter) ?
:->> 
:->> With a tap.  I've heard of some folks making a very small internal
:->> threading tool, but it's not economical if you figure what your time is
:->> worth.

Many places have Acme taps, (J&L, MSC, DoAll, Production Tool, etc.)
and they ain't cheap, but I've never seen a die for Acme threads. All
the xternal Acme I've seen is either rolled thread, or cut on a lathe.

[email-masked]
Wausau, WI. 44d 58m 00s N x 89d 36m 45s W
All opinions are my own, even if they are wrong!

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From: [email-masked] (Russ Kepler)
Date: Fri, 28 Jun 1996 22:32:23 GMT

In article <[email-masked]>,
>threading tool, but it's not economical if you figure what your time is

I cut a lot of internal threads using taps, but also have cause to
single point cut threads when it's not practical to use a tap, such
as a 1.5"x8tpi thread for my lathe spindle.  Lots of time a modeler
has more time than money, so something like this is an easy call.

Now if inside threading inserts and holders were just a bit
cheaper...

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From: [email-masked] (Scott Logan)
Date: 1 Jul 1996 18:46:10 GMT

In article <[email-masked]>, From [email-masked] 
> Now if inside threading inserts and holders were just a bit

Yep, just had a similar discussion with our buddy Pete Albrecht.  He was
in need of a 1"-12 threaded hole in a piece of his lathe, but he needed
the lathe to put the thread in the piece of his lathe etc...

It turns out, I'm going to do it for him at a small charge.  But then, I
have a mill available, AND the tap.

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From: [email-masked] (Russ Kepler)
Date: Tue, 2 Jul 1996 15:06:33 GMT

In article <[email-masked]>,
>the lathe to put the thread in the piece of his lathe etc...

It's always a good idea to cultivate a friend with larger machinery
than you have...

>have a mill available, AND the tap.

That's a bugger to tap in that size, but I imagine that you're using
the mill more to bore a straight hole and to hold the tap square.  
I've not had a lot of luck using a mill for threading without a
threading attachment.

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From: [email-masked] (Scott Logan)
Date: 2 Jul 1996 18:14:00 GMT

In article <[email-masked]>, From [email-masked] 
> I've not had a lot of luck using a mill for threading without a

Actually, it's not too bad.  1"-12 UNF is a LOT easier than 1-1/8"-8
ACME (Logan 14" Lathe Half Nuts).  Yes, I am speaking from personal
experience.

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From: [email-masked]
Date: 2 Jul 1996 22:50:30 GMT

>Now if inside threading inserts and holders were just a bit

Inside acme threads are pretty easy to cut on lathe, single point style.
I manufactured a new bronze leadscrew nut for my Hardinge horizontal
mill this way.  

If *I* could do it, anybody could.  I didn't even have a proper thread 
gage for grinding the too.  Just used a protractor.

===========================================================

 1959 BMW R50                                           Jim Rozen              
 1969 BMW R60US                                (JRR0 @ watson.ibm.com)                 
 1975 BMW R75/6    (The "new" one)        

===========================================================

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From: [email-masked] (Peter Drumm)
Date: 3 Jul 1996 10:33:01 GMT

In message <[email-masked]> - [email-masked]
(Scott Logan)2 Jul 1996 18:14:00 GMT writes:
:->
:->Actually, it's not too bad.  1"-12 UNF is a LOT easier than 1-1/8"-8
:->ACME (Logan 14" Lathe Half Nuts).  Yes, I am speaking from personal
:->experience.  
:->

Ever try a 2"-4 1/2 tap? Now -thats- hard turning, even with a 6 foot
tap handle<g>.

[email-masked]