Spiral Lock threads on tenon?

[carlsbad]

Well Alex, nobody can argue with your results. --Jerry

 

[joshb]

May I ask a thread related question while so many experts are here? I have an old Winchester Model 55 Takedown 30-30. The threads on the barrel are ground off on 4 sides. Same with the action. I can line up the cuts, push the barrel into the action, twist it a quarter turn and it's tight. Inserting the tubular magazine locks it in position. It seems this system would ease barrel switching on some of my other guns. Is the system only good for hunting gun accuracy with mild cartridges?

 

[alinwa]

May I ask a thread related question while so many experts are here? I have an old Winchester Model 55 Takedown 30-30. The threads on the barrel are ground off on 4 sides. Same with the action. I can line up the cuts, push the barrel into the action, twist it a quarter turn and it's tight. Inserting the tubular magazine locks it in position. It seems this system would ease barrel switching on some of my other guns. Is the system only good for hunting gun accuracy with mild cartridges?

yes

 

[Cloudrepair]

This is one of the things i was thinking about when I started a thread called "Sako A111 threads and?"

I don't see any reason worth changing to any other thread form.

I don't like putting a action wrench on or in the actions so I go with the barrel nut like the one I designed for that sako.
The nut has two parts with a 15* angle on back of first and front of second to increase the thread loading on the barrel nut.

After that it could be used as a shouldered barrel but it doesn't increase thread loading of the barrel shank.
And that brings up another question
(barrel torque) how much?
I have used 50 ft.lbs. then that brings me back to the question about deforming action with the wrench inside or out if you are using more than 50 say 100
I know what i see when (even hard materials) is torqued many times.

 

[Cloudrepair]

May I ask a thread related question while so many experts are here? I have an old Winchester Model 55 Takedown 30-30. The threads on the barrel are ground off on 4 sides. Same with the action. I can line up the cuts, push the barrel into the action, twist it a quarter turn and it's tight. Inserting the tubular magazine locks it in position. It seems this system would ease barrel switching on some of my other guns. Is the system only good for hunting gun accuracy with mild cartridges?

Thats like the first press i got ( Lee press) With the inserts.
That's got me thinking again?
that might not be good, I would have to change the action threads to try something like that.

 

[BoydAllen]

This is one of the things i was thinking about when I started a thread called "Sako A111 threads and?"

I don't see any reason worth changing to any other thread form.

I don't like putting a action wrench on or in the actions so I go with the barrel nut like the one I designed for that sako.
The nut has two parts with a 15* angle on back of first and front of second to increase the thread loading on the barrel nut.

After that it could be used as a shouldered barrel but it doesn't increase thread loading of the barrel shank.
And that brings up another question
(barrel torque) how much?
I have used 50 ft.lbs. then that brings me back to the question about deforming action with the wrench inside or out if you are using more than 50 say 100
I know what i see when (even hard materials) is torqued many times.

If you use the proper tools, removing and reinstalling a barrel is no problem. The big challenge can be removing the factory barrel. They may require different tools than we use for switch barrel rifles. I have switched barrels many times on my Viper action with absolutely no damage. I think that your conjecture is not based on any actual experience. I have also removed and installed barrels with nuts instead of integral shoulders. For me, their only advantage is that they do not require a lathe to headspace properly.

 

[Cloudrepair]

If you use the proper tools, removing and reinstalling a barrel is no problem. The big challenge can be removing the factory barrel. They may require different tools than we use for switch barrel rifles. I have switched barrels many times on my Viper action with absolutely no damage. I think that your conjecture is not based on any actual experience. I have also removed and installed barrels with nuts instead of integral shoulders. For me, their only advantage is that they do not require a lathe to headspace properly.

You are correct.
And I don't have any custom action to base my remarks on.
Lost everything in a camping trip involving a canoe and a lake trying to get to otherside for some target practise.
And I don't have money to test any eather.
I'm not the expert
just talking and learning

 

[JohnMill]

Being there is a lot of different threads, I am just wondering what your definition of a spiral lock thread is? Reason why I ask is I use spiral lock taps at work but I don't think that's the same thread form you guys are talking about

It would be something like Spiralock Inc. described in their patent. The reason Harold Vaughn thought it was a good idea was that he tested it pretty thoroughly and found it led to better accuracy (or could lead, I dunno).

 

[vonb]

With spiral lock threads, aren't the threads sacrificed on one of the components your mating them to? I had looked into this on a custom rifle some type back and opted not to go this route. I didn't want threads on a custom action damaged.

 

[JohnMill]

With spiral lock threads, aren't the threads sacrificed on one of the components your mating them to? I had looked into this on a custom rifle some type back and opted not to go this route. I didn't want threads on a custom action damaged.

I certainly thought so at the time (that the top of the V thread was bent by the ramp of the Spiralock ) but if it lead to the SuperShoot, World or 1000 Yard national wins (delusions of grandeur, no doubt), I would bronze it and build another. I was new to it all at the time. Learning how to run a lathe, shoot benchrest, and reload benchrest was a lot on the plate for a 50 year old kid.

 

[carlsbad]

I have no experience with spiralock but reviewing the design, for stainless actions on stainless barrels I would expect galling. and yes, I would expect damage causing both sets of threads to be unusable again.

I would also want to see the evaluation of the strength of this design. By engineering inspection, it looks ok. But if this was prevented to me for use on one of my day jobs, I would have to review the calc pretty carefully. --Jerry

 

[alinwa]

Taper, either on the action or the bbl tenon does work....counter-intuitive as you do it "backward" but it does work.

 

[Robert]

I have made long searches on the Net, trying to find a manufacturer for spiral wire thread inserts for 1.0625 x 16 or 18tpi or alternatively for the close metric equivalent M27 x 1,5mm. All stocklists seem to end at 1'00 x 12 or 10tpi.. Therefore, I do not see any point discussing their merits for barrel itting…
R.G.C

 

[Dusty Stevens]

I have made long searches on the Net, trying to find a manufacturer for spiral wire thread inserts for 1.0625 x 16 or 18tpi or alternatively for the close metric equivalent M27 x 1,5mm. All stocklists seem to end at 1'00 x 12 or 10tpi.. Therefore, I do not see any point discussing their merits for barrel itting…
R.G.C

Heli-coil and re-coil will make whatever you want but thread inserts have nothing to do with spira lock threads.

 

[JohnMill]

Heli-coil and re-coil will make whatever you want but thread inserts have nothing to do with spira lock threads.

Hey Dusty, I don't know where Robert got "insert" from but when I contacted Spiralock, they said they would sell the inserts for thread cutting in some minimum amount, a huge outlay for me at the time and enough that I could have threaded barrels for the two of us for the rest of our lives.. Also, I don't recall Vaughn mentioning that using Spiralock threads would render unreusable either the barrel or the action but he got great result with a number of things. He seemed to operate at a different altitude from most of us.

 

[Robert]

Heli-coil and re-coil will make whatever you want but thread inserts have Nothing to do with spira lock threads.

Dusty,
We name them all inserts here. Having a made on order, minimal quantity order of certainly no less tnan 1000 , add the cost of the thread plug gauge and fittiing tool… Notfor me despite I daw some possible applications for it.

Heli-coil and re-coil will make whatever you want but thread inserts have nothing to do with spira lock threads.

Dusty,
They are all named inserts here. Having had good experience in the past, I considered them for possible use for certain applications. Yes, they can be made on special order, but, considering the minimal order of probably noless than the thousands, plus a specially-made thread plug gage, specific fitting tool make the idea utopic.

Yours
R.G.C

 

[Dusty Stevens]

Youre thinking of this robert:



And everybody else is talking about this kind of “insert”

Dusty,
We name them all inserts here. Having a made on order, minimal quantity order of certainly no less tnan 1000 , add the cost of the thread plug gauge and fittiing tool… Notfor me despite I daw some possible applications for it.


Dusty,
They are all named inserts here. Having had good experience in the past, I considered them for possible use for certain applications. Yes, they can be made on special order, but, considering the minimal order of probably noless than the thousands, plus a specially-made thread plug gage, specific fitting tool make the idea utopic.

Yours
R.G.C

 

[Robert]

Dusty,
Understood, sorry.

Confusion cane from the fact Stanley also manufacture normal thread wire coil inserts...and here too, they do not list over 1.000.

R.G.C

 

[Will Henry]

The Spiraloc thread was designed as a self-locking thread. In order for the thread to work as intended, some deformation of one surface or the other has to occur. I seriously doubt there is any real advantage to the use of this type of thread on a rifle. I have used vee threads, square threads, Acme threads, and buttress threads and I have never seen any advantage to one over the others. Vee is really easy.
An angled seat at the shoulder does make for a more rigid connection but, again, any functional advantage would be pretty hard to prove. A flat face seems to work well enough. WH

 

[Canadian bushman]

I dont like Spiral lock threads.

Threads tear themselves up.

Spiral lock has everything patented and gouges everyone.

Tool pressure goes up.

Gauging is ridiculous.

Ive never seen spiral lock threads in a precision application. Ive always seen them on parts that will be subjected to massive G-forces and temperature swings.

What kind of threads are on your micrometers?