I've got a project that is calling for internally and externally threaded
stainless tubing. I'm having a hard time finding what I need, so I
thought I'd ask here before I draw up a plan and get a quote from a local
machine shop.

What I need is something like this:

| \\ | | // |
| // | | \\ |
| \\ | | // |
| // | | \\ |

With the inner hole on the externally threaded tubing being .055-.070 and
the thread size being 8-32 (one size up or down would be fine, but 10-32
is pushing it) and the OD of the internally threaded tubing being about
1/4". I need them about 1/2" long, though longer is fine, as I can cut
them down to size.

I'm looking for about 300-500 of each.

Thanks for any help!

Also, I'm looking for either split brass tubing, or bead rolled brass
strip. It need to go on/around 22ga stainless. Say between 1/8"-1/4" OD.

The final effect is something like this:
http://www.sunshadowdesign.com/galle...et/duncan2.jpg

(Not my work, just found something of similar style)

Thansk again!
Todd

On Tue, 12 May 2009 13:00:18 +0000, Todd Rich wrote:

I've got a project that is calling for internally and externally
threaded stainless tubing. I'm having a hard time finding what I need,
so I thought I'd ask here before I draw up a plan and get a quote from a
local machine shop.

What I need is something like this:

| \\ | | // |
| // | | \\ |
| \\ | | // |
| // | | \\ |

With the inner hole on the externally threaded tubing being .055-.070
and the thread size being 8-32 (one size up or down would be fine, but
10-32 is pushing it) and the OD of the internally threaded tubing being
about 1/4". I need them about 1/2" long, though longer is fine, as I
can cut them down to size.

I'm looking for about 300-500 of each.

Thanks for any help!

Also, I'm looking for either split brass tubing, or bead rolled brass
strip. It need to go on/around 22ga stainless. Say between 1/8"-1/4"
OD.

The final effect is something like this:
http://www.sunshadowdesign.com/galle...duncancoronet/
duncan2.jpg

(Not my work, just found something of similar style)

Thansk again!
Todd

Find the appropriate sized tubing and thread it yourself?

How deep do you need the threads on the inside-threaded part?

Threading some varieties of stainless is a real treat, if you like
cussing and broken taps. I'd check McMaster and other sources out there
for what alloys are available, then I'd check back here for what may be
machinable.

If your outer-threaded parts are short enough you may be able to drill
out screws.

--
http://www.wescottdesign.com

--Forget what they're called but you might want to get in touch with
the folks who make things like nutserts. I've seen these things used to
install a bolt-to point in soft materials like endgrain wood, etc.

--
"Steamboat Ed" Haas : Imagine what I could do if
Hacking the Trailing Edge! : I knew what I was doing...
www.nmpproducts.com
---Decks a-wash in a sea of words---

"Todd Rich" wrote in message
...
I've got a project that is calling for internally and externally threaded
stainless tubing. I'm having a hard time finding what I need, so I
thought I'd ask here before I draw up a plan and get a quote from a local
machine shop.

What I need is something like this:

| \\ | | // |
| // | | \\ |
| \\ | | // |
| // | | \\ |

With the inner hole on the externally threaded tubing being .055-.070 and
the thread size being 8-32 (one size up or down would be fine, but 10-32
is pushing it) and the OD of the internally threaded tubing being about
1/4". I need them about 1/2" long, though longer is fine, as I can cut
them down to size.

I'm looking for about 300-500 of each.

Thanks for any help!

Also, I'm looking for either split brass tubing, or bead rolled brass
strip. It need to go on/around 22ga stainless. Say between 1/8"-1/4" OD.

The final effect is something like this:
http://www.sunshadowdesign.com/galle...et/duncan2.jpg

(Not my work, just found something of similar style)

Thansk again!
Todd

Isn't what you are describing called a "thread repair insert"?

Ivan Vegvary

If you decide to go custom machine, let my son have a shot at it. He just
got a pink slip this afternoon. laid off for six weeks. My CHNC lathe could
turn these right out.

Karl

Karl Townsend wrote:
If you decide to go custom machine, let my son have a shot at it. He just
got a pink slip this afternoon. laid off for six weeks. My CHNC lathe could
turn these right out.

Karl




Hey Karl,

I have a small job I've been wanting to have made.

If you would like to discuss it, drop me a line.

Richard

On Tue, 12 May 2009 13:00:18 +0000 (UTC), the infamous Todd Rich
scrawled the following:

I've got a project that is calling for internally and externally threaded
stainless tubing. I'm having a hard time finding what I need, so I
thought I'd ask here before I draw up a plan and get a quote from a local
machine shop.

I've never seen that, at least that I can recall. Sorry. But I have a
smartarse comment below for you.


What I need is something like this:

| \\ | | // |
| // | | \\ |
| \\ | | // |
| // | | \\ |

Kewl, man. Ascii-paisley!

--
No matter how cynical you are, it is impossible to keep up.
--Lily Tomlin

Tim Wescott wrote:
(snip)
Find the appropriate sized tubing and thread it yourself?

Thought about that, but the time involved for me to do it by hand (no
lathe) would make it unprofitable.

How deep do you need the threads on the inside-threaded part?

We were thinking all the way, but that was just a preference.

Threading some varieties of stainless is a real treat, if you like
cussing and broken taps. I'd check McMaster and other sources out there
for what alloys are available, then I'd check back here for what may be
machinable.

If your outer-threaded parts are short enough you may be able to drill
out screws.

I think I've convinced my partner on this project to go with brass now.

Ivan Vegvary wrote:

(snip)
Isn't what you are describing called a "thread repair insert"?

Ivan Vegvary

Close, but not quite. The press in inserts are close to what I want for
the external part, but threaded both sides versions aren't quite what I
need.

Karl Townsend wrote:
If you decide to go custom machine, let my son have a shot at it. He just
got a pink slip this afternoon. laid off for six weeks. My CHNC lathe could
turn these right out.

Karl

Replied privately.

Todd Rich wrote:
I've got a project that is calling for internally and externally threaded
stainless tubing. I'm having a hard time finding what I need, so I
thought I'd ask here before I draw up a plan and get a quote from a local
machine shop.

What I need is something like this:

| \\ | | // |
| // | | \\ |
| \\ | | // |
| // | | \\ |

Most of that part is called an:
"Half inch long 8-32 hex standoff"
They are available in aluminum, brass and stainless.

Buy a bunch and send them to a guy with a lathe to cut the external
thread, would be my advice.

Have a look at the 1923B for example:
http://www.keyelco.com/products/specs/spec18.asp

--Winston

--

Don't *faff*, dear.

Winston wrote:
Todd Rich wrote:
I've got a project that is calling for internally and externally threaded
stainless tubing. I'm having a hard time finding what I need, so I
thought I'd ask here before I draw up a plan and get a quote from a local
machine shop.

What I need is something like this:

| \\ | | // |
| // | | \\ |
| \\ | | // |
| // | | \\ |

Most of that part is called an:
"Half inch long 8-32 hex standoff"
They are available in aluminum, brass and stainless.

Buy a bunch and send them to a guy with a lathe to cut the external
thread, would be my advice.

Have a look at the 1923B for example:
http://www.keyelco.com/products/specs/spec18.asp

--Winston

Actually, that looks just about perfect. They even have a part builder.
I'm giving Karl first shot, but if not, looks like this place will have
what I need. Thank you!
Todd
P.S. The part that needs an external thread also needs a smooth through
hole in the center.

On May 12, 6:00*am, Todd Rich wrote:
I've got a project that is calling for internally and externally threaded
stainless tubing. *I'm having a hard time finding what I need,

Others have suggested buying massproduced spacers and
adding external threading; in terms of a short shop job, you
could also buy massproduced allthread rod (1/4-28 stainless)
and drill/tap a soft 5C collet to hold little bits of it for
drilling/threading in a lathe.

It might be easier to hold by the big external (threaded) surface
and do the small hole, than to hold it by the hole and
thread the outer diameter.

Todd Rich wrote:
(...)

P.S. The part that needs an external thread also needs a smooth through
hole in the center.

Ah! Now I see what you are doing.

Just through - drill these in a lathe 'soft collet' for the inside part:
http://store.hamiltonmarine.com/browse.cfm/4,13248.html

Your pilot hole is the center of the cup.

--Winston
--

Don't *faff*, dear.