Threaded Tapers

I saw something like that, on the base of a camera, back in the film days.
The threaded taper would atach the camera to a tripod. Other than that, I
havn't seen such.

Christopher A. Young
Learn more about Jesus
  www.lds.org
.

Hi guys,

I've seen pictures of threaded tapers being machined on lathes and was
wondering what the hell use they are? I mean, since the diameter of
the threaded section is constantly varying, what can it possibly be
screwed into? I cannot imagine any nut or internal thread that would
accommodate such a piece of work.

Kindly disabuse me of my ignorance if you can, thanks.

P.

On Sun, 29 Jul 2012 08:17:10 -0400, Stormin Mormon wrote:

I haven't seen any threaded tapers for tripod-attaching, just 1/4-20
or 3/8-16 straight threads, but mechanical remote shutter releases
often have a tapered thread, as clearly seen in following photo.
<http://en.wikipedia.org/wiki/File:OldCamera_CableRelease.jpg

--
jiw

On 7/29/2012 8:00 AM, phaedrus wrote:

Pipe threads are tapered...  It makes it more likely to seal when tight.

 Please elaborate further. Pipe taps are tapered, and spring winding
mandrels could be mistaken for taps.

jsw

No, it's not a pipe thread; very much steeper taper than a pipe
thread...

One such as I refer to appears in South Bend's handbook, How to Run a
Lathe at p.82. Sorry I have no facilities to upload a scan of the
picture. :(

Jim Wilkins wrote:

BTW, is there a FAQ for this group?

I'll start writing it.

Christopher A. Young
Learn more about Jesus
  www.lds.org
.

BTW, is there a FAQ for this group?

There is one.

Scott Logan used to post a link to it every month, but I think he got so
disgusted with the political bs that he gave up.

http://w3.uwyo.edu/~metal/faqa.html

Paul K. Dickman

    Yes -- but at least a decade out of date.  Whoever was
maintaining it (at a college) must have retired, and the files are just
still there (last I checked), along with archives of many years of
postings until that script was shut down.  It was not a particularly
smart script, so if you are on a Windows system, be warned that it
archived a few copies of a virus current at the time. :-)

    Here is the URL:

    <http://w3.uwyo.edu/~metal/

and it is still there.

    Enjoy,
        DoN.

--
                  Remove oil spill source from e-mail
          (too) near Washington D.C. | http://www.d-and-d.com/dnichols/DoN.html
           --- Black Holes are where God is dividing by zero ---

The picture in the SB book is just an illustration. Exaggerated to make the
setup clear.
If you need a to see something modern, threaded with that much taper look at
a tapered buffing spindle.

Paul K. Dickman

On Sun, 29 Jul 2012 07:25:23 -0700 (PDT), phaedrus


http://wewilliams.net/SBLibrary.htm 44 page booklet.
P.82 does not compute.  Was it another handbook?

(Unfortunately, I probably can't help you but I'm curious, just the
same.)

--
It takes as much energy to wish as to plan.
                       --Eleanor Roosevelt

I suspect that drawing exaggerates the length to make the taper more
evident than it would be on a real pipe tap.

http://www.hycrack.co.uk /

jsw

    O.k.  That reminds me of another use.  The arbors on which
buffing wheels are mounted.  You need a right-hand thread on one side
of the grinder used to drive it, and a left-hand one on the other side.
Just push the buffer on, then switch on and it self tightens.


    Probably a buffing wheel arbor.  Or just a demonstration on how
to do it.  O.K.  Looking at the copy which I have here, it actually
states in the description "Tapered screw threads, such as pipe threads
... " Obviously, the one being shown is not a pipe thread, but it could
be used as the arbor for a buffing wheel.  Or just to train an
apprentice on how to do it.

    This is in Volume 1 Edition 50 which happens to be within reach.

    If I had a matching taper tap, I might use it for studs designed
to screw in and wedge really tight.

    Enjoy,
        DoN.

--
                  Remove oil spill source from e-mail
          (too) near Washington D.C. | http://www.d-and-d.com/dnichols/DoN.html
           --- Black Holes are where God is dividing by zero ---

On Sun, 29 Jul 2012 05:00:32 -0700 (PDT), phaedrus


Oil drilling pipe tool joints are also taper threaded.
Cheers,
John B.

http://www.moparmusclemagazine.com/techarticles/drivetrain/mopp_1203_cast_i =
ron_cylinder_head_crack_repair/index.html

On Sun, 29 Jul 2012 05:00:32 -0700, phaedrus wrote:


No one's mentioned wood screws yet, which are tapered along their length,
or sheet metal screws, which are tapered at the nose.

Aren't taps tapered?

Spring winding mandrels -- I never thought of that.

--
Tim Wescott
Control system and signal processing consulting
www.wescottdesign.com

On Sunday, July 29, 2012 8:53:54 AM UTC-7, Tim Wescott wrote:

 

Modern taps aren't really tapered, the threads are just on a tapered shaft
(the top of the crest is ground off of the leading teeth, so cutting is
progressive and not done all with the first tooth).   But, old-timey taps
WERE tapered, so you could get any tightness of  nut you wanted.

This was important when bolts were made with threading-plate type
dies (with poor diameter control) on forged rods (again, with poor
diameter control).

Another tapered-screw application is seen on the pilot of auger-type
wood boring bits.   Yet another, is sometimes seen on citrus juicers.

On Sun, 29 Jul 2012 10:03:58 -0700, whit3rd wrote:


<snip>

Which reminds me of the puree-ing attachment on our Kitchen-aid mixer,
which is a long tapered screw into a conical screen.

--
Tim Wescott
Control system and signal processing consulting
www.wescottdesign.com

The threads aren't (except for pipe). The taper is a separate grind
that creates the cutting edges. Run a nut onto one and examine the
free play.

jsw