13xx SS Pump Tube Fabrication

[0351_Vet]

I am not sure  if this has been discussed before, but.....

We at CAPOF are fortunate to have some great talent ed people / machinist here.

I was wondering why someone here couldn't make up a CNC program or use their manual abilities to
make up some 13xx SS Tubes. I am not a machinist, but I have looked at the 13xx tubes and it doesn't look like it would
be that difficult to reproduce.

Is there something I am missing? Is anyone up for the challenge?

I am sure if several were produce at one time the labor cost (time) would be reduced and I am not sure,
but I would think the SS tubing could be ordered with the right I.D. and wall thickness.

Something to keep in our discussions, I would love to here comments about doing something like this. 

[BDS]

Hey Walt, glad to see you back from the rear echelons, those Navy docs  didn't poke you too much did they? 

Your concept is exactly right... those tubes are just a few cross-drills, mill slots and face the ends. Seamless 302 stainless tube is available all over the place, might even find the I.D. ready to go and O.D. could be machined in a blink o' the eye.

302 polishes up like chrome too 

[cmj21973]

FYI on milling stainless steel:
"Rules for Machining Stainless Steels

Some general rules apply to most machining of stainless steels:

•         1. The machine tool must be sturdy, have sufficient power and be free from vibration.

•         2. The cutting edge must be kept sharp at all times. Dull tools cause glazing and work hardening of the surface. Sharpening must be carried out as soon as the quality of the cut deteriorates. Sharpening should be by machine grinding using suitable fixtures, as free-hand sharpening does not give consistent and long-lasting edges. Grinding wheels must be dressed and not contaminated.

•         3. Light cuts should be taken, but the depth of the cut should be substantial enough to prevent the tool from riding the surface of the work - a condition which promotes work hardening.

•         4. All clearances should be sufficient to prevent the tool from rubbing on the work.

•         5. Tools should be as large as possible to help to dissipate the heat.

•         6. Chip breakers or chip curlers prevent the chips from being directed into the work.

•         7. Constant feeds are most important to prevent the tool from riding on the work.

•         8. Proper coolants and lubricants are essential. The low thermal conductivity of austenitic stainless alloys causes a large percentage of the generated heat to be concentrated at the cutting edges of the tools. Fluids must be used in sufficient quantities and directed so as to flood both the tool and the work."

from:
http://www.azom.com/article.aspx?Articleid=1178#_Rules_for_Machining

#7 and #8 pretty much dictates enclosed CNC machines with flood coolant systems.

[youtube]https://www.youtube.com/watch?v=yWn4BNvwtp0#ws]Taig CNC milling machine flood cooling[/url]

[0351_Vet]

Hey Walt, glad to see you back from the rear echelons, those Navy docs  didn't poke you too much did they? 

Your concept is exactly right... those tubes are just a few cross-drills, mill slots and face the ends. Seamless 302 stainless tube is available all over the place, might even find the I.D. ready to go and O.D. could be machined in a blink o' the eye.

302 polishes up like chrome too 

Okay then BDS.......When are you going to make a couple for you and I? 
I sure as heck don't have the ability (or the machinery) to do it. 
If you could make some, I would be more then happy to help pay for your time and knowledge. 
Send me a PM if you would like to discuss this more or would be interested. Thanks for your response.

Oh, and BTW, I had a Civilian Ortho-Surgeon do my shoulder. (Even though it's Service-Connected)
I really didn't want VA knifing on me. My Dr. is a very talented surgeon, so it wasn't a hard choice to make.
Plus, he has a lot of respect for Vets and tends to go above and beyond when caring for them. He  will be
doing my neck next year. 

[1377x]

there was a guy named chevell awhile back that made his own 1377 tube iirc
his posts are on the green forum.he made a 900fps+ long stroke 1377
don cothran also made some stainless steel 1377 tubes for pacificpelletguns before darren absconded with peoples funds
the stainless steel tubes available had to be opened up because the inside diameter was too small
more work than known needs to be done but it is possible enen by a guy with no machining tools
you have to find chevells posts on the green to appreciate what can be done with determination

[0351_Vet]

Bump for more conversation.
Someone should be able to make a few? 

[chongman]

Can someone give up some specs for the tube.. inside dia., outside dia. etc? I will start to source it and also have a NASA connection if needed.

[BDS]

Chong... when you get 13XX dims, here's McMaster Carr 304 SS seamless tube link to compare to     http://www.mcmaster.com/#standard-metal-tubing/=k8ymhb

304 shines up like chrome too 

[0351_Vet]

Can someone give up some specs for the tube.. inside dia., outside dia. etc? I will start to source it and also have a NASA connection if needed.

Chongman, That would be "out of this world" if you could make it happen.

Seriously, That would be so cool, I would be in for a few.     

Maybe we could get them milled to except the P-Rod Trigger group, I have one (1389 Backpacker Tube) that was done by 1377x, that I could furnish as a template / model. (Of course you would have to mod or use another hammer).

[1377x]

heres one take on it
http://www.network54.com/Forum/275684/message/1151699514/stainless+extended+pumptube+for+1377

the best bet would be to contact don c and ask him how many tubes would need to be ordered to do a run

[1377x]

found some more
http://www.network54.com/Forum/275684/message/1195314306/Re-+Chevell+what+grade+of+stainless

[0351_Vet]

Is this what we might need?     
Thanks for the link. I have a 1389 tube loose. I might just put a mic on it today.

Type 304 stainless steel has good corrosion resistance for an economical alternative to Type 316.

Type 316 stainless steel contains more nickel and has molybdenum for better resistance to corrosion than Type 304.
Straight Lengths 1 ft. & 3 ft.
Tolerance   Max. psi
         
Gauge            OD            Wall             ID                          @ 72° F                Each    1LF                   Each 3LF
Type 304 Stainless Steel
14.5                    0.078"   0.008"   0.063"   ±0.001"   3,000   8988K291   $9.02   8988K293   $23.14
Type 316 Stainless Steel
14.5                    0.078"   0.008"   0.063"   ±0.001"   3,000   89875K181 16.26   89875K182  41.69

[0351_Vet]

I'm excited to see the interest for SS 13xx tubes generating again.
The last DC one we had going went bye-bye.

If we  convince DC that we would be buying his breeches, safeties, triggers etc....to go with the tubes, that might be a Deal Maker. 
(But we have too get them milled to except the P-Rod trigger set-up) 

[1377x]

closed mouths dont get fed
we need to know how many tubes would be needed to do a run the rest of the stuff he stocks
even though i have no interest in a stainless steel 1377 i'll ask
dc is a business man as long as the stuff is/will be paid for nothing else should matter

[0351_Vet]

closed mouths dont get fed
we need to know how many tubes would be needed to do a run the rest of the stuff he stocks
even though i have no interest in a stainless steel 1377 i'll ask
dc is a business man as long as the stuff is/will be paid for nothing else should matter

Ah, come on ED......Sure you would like just 1 stainless steel 13xx. 
I think it would be COOL.
Say maybe a, Shiny SS 1325 with a polished M-Rod Trigger Frame a DC SS Breech.