I like to repair the threat of the rigging terminals. So have need for
withworth halve inch tapping and cuttingplates. But the the threat is
also left. Where can I order for that gear? Is there any website?
Thanks,
Arjen

On Sat, 11 Sep 2004 15:03:48 +0200, A en M Sijtsma
wrote:

I like to repair the threat of the rigging terminals. So have need for
withworth halve inch tapping and cuttingplates. But the the threat is
also left. Where can I order for that gear? Is there any website?
Thanks,
Arjen

http://www.engineerstoolroom.co.uk/dies.htm

Prices in UK pounds Taps, dies, die nuts.

Brian W

thanks for that link Brian. I live about 10 miles away and never knew the
place existed. Cheers
Brian
"Brian Whatcott" wrote in message
...
On Sat, 11 Sep 2004 15:03:48 +0200, A en M Sijtsma
wrote:

I like to repair the threat of the rigging terminals. So have need for
withworth halve inch tapping and cuttingplates. But the the threat is
also left. Where can I order for that gear? Is there any website?
Thanks,
Arjen

http://www.engineerstoolroom.co.uk/dies.htm

Prices in UK pounds Taps, dies, die nuts.

Brian W


---

Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.760 / Virus Database: 509 - Release Date: 10/09/2004

Ur Wlcm

B

On Mon, 13 Sep 2004 13:36:22 +0100, "brian clode"
wrote:

thanks for that link Brian. I live about 10 miles away and never knew the
place existed. Cheers
Brian
"Brian Whatcott" wrote in message
.. .
On Sat, 11 Sep 2004 15:03:48 +0200, A en M Sijtsma
wrote:

I like to repair the threads of the rigging terminals. So have need for
whitworth half inch tapping and cutting plates. But the thread is
also left. Where can I order for that gear? Is there any website?
Thanks,
Arjen

http://www.engineerstoolroom.co.uk/dies.htm

Prices in UK pounds Taps, dies, die nuts.

Brian W

Please be forewarned! Using a die to chase a thead on a rigging terminal is
bad news. It sets up stress concentrations at the bottom of the V that will
lead to cracking and failure. Those threads are rolled and have radiused top
and bottom profiles just for that reason.
Steve

"A en M Sijtsma" wrote in message
...
I like to repair the threat of the rigging terminals. So have need for
withworth halve inch tapping and cuttingplates. But the the threat is
also left. Where can I order for that gear? Is there any website?
Thanks,
Arjen

As it happens, the Whitworth profile DOES have a radiused root.
Still, the caution is well-founded.
One can only suggest that it is better to clean up a thread with a die
nut than force the threaded connection to engage, on a lesser of two
evils basis.

Brian W

On Sun, 12 Sep 2004 17:39:10 +0200, "Steve Lusardi"
wrote:

Please be forewarned! Using a die to chase a thead on a rigging terminal is
bad news. It sets up stress concentrations at the bottom of the V that will
lead to cracking and failure. Those threads are rolled and have radiused top
and bottom profiles just for that reason.
Steve

"A en M Sijtsma" wrote in message
.. .
I like to repair the threat of the rigging terminals. So have need for
withworth halve inch tapping and cuttingplates. But the the threat is
also left. Where can I order for that gear? Is there any website?
Thanks,
Arjen

Brian Whatcott wrote in message . ..
As it happens, the Whitworth profile DOES have a radiused root.
Still, the caution is well-founded.
One can only suggest that it is better to clean up a thread with a die
nut than force the threaded connection to engage, on a lesser of two
evils basis.

Not the lesser. Regardless of profile, a rolled thread is rolled for
a good metalurgical reason, and is no longer a rolled thread when
recut with a die (outer grain structure altered). Any way you cut it
(pun) metal is being removed where a thread was rolled so that no
metal would be removed. This is why replacement fittings are made,
and which likely cost less than what the OP may pay for threading
tools + shipping & time. If it won't clean up well enough on a wire
wheel it should be tossed. Sounds like a turnbuckle & we know they
only fail when it is *very* inconvenient.

On 12 Sep 2004 23:14:51 -0700, wrote:

Brian Whatcott wrote in message . ..
As it happens, the Whitworth profile DOES have a radiused root.
Still, the caution is well-founded.
One can only suggest that it is better to clean up a thread with a die
nut than force the threaded connection to engage, on a lesser of two
evils basis.

Not the lesser. Regardless of profile, a rolled thread is rolled for
a good metalurgical reason, and is no longer a rolled thread when
recut with a die (outer grain structure altered). Any way you cut it
(pun) metal is being removed where a thread was rolled so that no
metal would be removed. This is why replacement fittings are made,
and which likely cost less than what the OP may pay for threading
tools + shipping & time. If it won't clean up well enough on a wire
wheel it should be tossed. Sounds like a turnbuckle & we know they
only fail when it is *very* inconvenient.

I am not unsympathetic to this position. Still, the root is usually
undamaged, and it is the root that propagates the initial crack, often
enough.

Brian Whatcott

Brian Whatcott wrote in message . ..

I am not unsympathetic to this position. Still, the root is usually
undamaged, and it is the root that propagates the initial crack, often
enough.

Then we might ask what is being removed by the threading tools in the
process of cleanup, why, and what is the effect. It is a galling
problem & only a localized burr removed, or is one recutting into the
work-hardened rolled thread? If corrosion has advanced to the point
of suggesting recutting, then stress corrosion may be be a darker
issue too. I'd at least dye-check it, wouldn't you? (I wonder how
much a new fitting costs him after all the prudent consideration,
inspection, die cost & trouble are tallied...YMMV)