Maybe this is added on in the UK, but I don't think they use the standard birdcage.
Is anyone interested in reproducing this. I have an airsoft copy that I was going to have drawn up since this is unobtainium. Even in the US.
Colt Canada builds for the SAS
- Thread starter Big Bad
- Start date
Is anyone interested in reproducing this. I have an airsoft copy that I was going to have drawn up since this is unobtainium. Even in the US.
- Location
- Richmond, BC
That would be cool.
Can you believe that A Z Tec had this listed as available at one point?
I have one of these, and it was a huge pain in the dik to source:
vickers vanguard
CGN Regular
- Location
- Laval, Quebec
Thanks for your input
- Location
- Richmond, BC
GFM pretty much dominates the market of using radial forging technologies to make barrels, because they are the biggest supplier of CHF machines. Pretty much all CHF machines are based on GFM technology. Winchester is the only manufacturer mentioned using a different CHF technology.
I stand corrected. I dug into my library and found a paper published by an ex GFM engineer on using radial forging on making gun barrels.
This is what it is said:
However, another engineering publication I read long time ago asserted the tapered bore is a by product of the radial forging process. Perhaps the mandrel and the position of the mandrel that create tapered bore generate some other more important advantages to the production process.
And technology is not unique to colt Canada. HK and FN, they are all using GFM technologies, and they both produce tapered bores. The details may vary, but the basic technology is GFM's.
I stand corrected. I dug into my library and found a paper published by an ex GFM engineer on using radial forging on making gun barrels.
This is what it is said:
However, another engineering publication I read long time ago asserted the tapered bore is a by product of the radial forging process. Perhaps the mandrel and the position of the mandrel that create tapered bore generate some other more important advantages to the production process.
And technology is not unique to colt Canada. HK and FN, they are all using GFM technologies, and they both produce tapered bores. The details may vary, but the basic technology is GFM's.
That would be cool.
Can you believe that A Z Tec had this listed as available at one point?
I have one of these, and it was a huge pain in the dik to source:
I wish they would make a run of these for us civilians. I have the 3 prong version myself.
Hammer forge technology is not unique to CC, just as CC machining isn't unique to Knight's. How you use the technology, the programming and the alloying is unique to canada. Forging the chamber integrally along with the taper bore are very challenging and also unique to CC. It only works with the special alloy. The process is actually much more complicated to develop than you let on, and the Diemaco process created extremely strong, safe and consistent production.
I saw it and worked with the engineers that developed it and the craftsman that made the barrels. I worked on the testing. and I saw the other forges and watched HK forge barrels. The only thing they could repeat was bends that have to be hydraulically rammed out. Still good barrels, just not Diemaco.
I can't speak for where their customer service or marketing went after I left, but the barrel technology is solid. I bet my life on it and would again.
Here is a GFM video that explains how its forger CHF a barrel and chamber together. If a tapered bore is to be made, the mandrel itself will be more complicated than a straight cylinder. So to make good hammer ing at this point, the quality of the mandrel, the consistency of the mandrel feed speed and rotation... will be some key points
But as you can see, the theory that a conical mandrel is used because it is easier to retract the mandrel along the blank does make sense. If the mandrel is straight, it may get dragged inside the barrel. So a conical mandrel probably makes the speed of the mandrel movement more consistent and hence overall better barrel quality. If that is the case, the bore of the barrel must be tapered in the first length of the mandrel.
So at the end of the day, using a conical mandrel may have double benefit, both at the forging process and the resulted shape of the barrel.
But as you can see, the theory that a conical mandrel is used because it is easier to retract the mandrel along the blank does make sense. If the mandrel is straight, it may get dragged inside the barrel. So a conical mandrel probably makes the speed of the mandrel movement more consistent and hence overall better barrel quality. If that is the case, the bore of the barrel must be tapered in the first length of the mandrel.
So at the end of the day, using a conical mandrel may have double benefit, both at the forging process and the resulted shape of the barrel.
Put your 2 cents in there Phil. You worked there and where one of the Design Engineers. All these threads are about is learning.
BeaverMeat
CGN Ultra frequent flyer
- Location
- Nanaimo, B.C.
I dunno. Arguments of "who makes the best barrel" is quite redundant these days. The tech has reached a peak. You can buy a mass produced Remington 700 that shoots sub MOA out of the box.
My excuse and reason for owning one is that a Diemaco is a Canadian product and arguably the finest AR in the world, the SAS & SBS purchases being the greatest and most sincere celebrity endorsements available with a lot of other countries' purchases backing that up.
And Remington uses the same AGM hammer forging technology like anyone else. There is only one way to mass produced barrels with good quality.
The basic technology hasn't really changed that much, but the controls of the process are benefited by way better technology and it is easier to generate good results.
Funny thing I was watching a video from the 60's or 70's about the production of G3 in the HK factory. The cold hammer forging machine looked exactly the same as the one in the video that was taken a few years ago, i am fairly certain it is the same machine, but it probably got upgraded and rebuilt several times. The obvious difference is the addition of robotic arm instead of a human to insert the mandrel and blank. But the gauge on the side is still the good old mechanical one.
