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Old 11-05-2016, 01:03 PM   #16
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About 6 months ago I contacted them asking them to put a little more thread on the cylinder head and they recently contacted me saying that they have added more thread. This means it should never break even under massive stress.
Not much of improvement then. First 2-6 threads get practically all the load. Adding more threads has little impact on strength.
The best cylinder on the market is an EdGi P60, but that's 100$ more than his regular one. It's worth it if you have a VSR X.
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Old 11-06-2016, 11:45 PM   #17
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Not much of improvement then. First 2-6 threads get practically all the load. Adding more threads has little impact on strength.
any bit of extra thread is going to hold more. i dont know where you are getting that theory at.
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Old 11-07-2016, 12:02 AM   #18
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Is it the length of the threads (ie. the cylinder head is longer), or the depth of the threads into the cylinder wall that they improved?
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Old 11-08-2016, 08:57 AM   #19
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any bit of extra thread is going to hold more. i dont know where you are getting that theory at.
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Here you go an article on that - https://www.fastenal.com/en/78/screw-thread-design (picture at the bottom - "Load distribution...")

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Old 11-08-2016, 09:34 AM   #20
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Here you go an article on that - https://www.fastenal.com/en/78/screw-thread-design
i can imagine why it's not linear
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Old 11-08-2016, 06:26 PM   #21
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Not much of improvement then. First 2-6 threads get practically all the load. Adding more threads has little impact on strength.
True, but if you need/want more strength from a particular setup you are left with the following options:

Harder material
Larger diameter
Coarser pitch (if still maintaining adequate thread count)

Naturally, in the spirit of overkill the N60 cylinder does all of the above.

Pictured is a standard VSR-10 cylinder next to the N60 cylinder.

VSR-10 cylinder is 0.75mm wall (22.5mm ID 24mm OD) with M23x0.75mm thread pitch (IIRC)
VSR-X N60 cylinder is 2mm wall (23mm ID 27mm OD) with M25x1.5mm thread pitch
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Old 11-09-2016, 08:18 AM   #22
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SniperPenguin is amuzed in the search on the perfect joule creep.

Why don't you build a firearm instead?
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Old 11-09-2016, 09:13 AM   #23
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Originally Posted by careful View Post
Pictured is a standard VSR-10 cylinder next to the N60 cylinder.

VSR-10 cylinder is 0.75mm wall (22.5mm ID 24mm OD) with M23x0.75mm thread pitch (IIRC)
VSR-X N60 cylinder is 2mm wall (23mm ID 27mm OD) with M25x1.5mm thread pitch
Isn't 27mm OD a tad too big for a VSR outer barrel? That's bigger than the chamber
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Old 11-09-2016, 09:39 AM   #24
 
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Tis the point. It was not made for standard VSR rifles. It was purposely built for the next line of VSR-X rifles.
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Old 11-09-2016, 09:58 AM   #25
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Isn't 27mm OD a tad too big for a VSR outer barrel? That's bigger than the chamber
In my personal measurements the chamber itself is 1.053" (26.75mm) where the cylinders are ordered oversized so they can be finished up at ~1.055" (26.8mm) with no cylinder wall taper due to the sear slot. The V1 VSR-Xs are fully capable of fitting these cylinders given proper prep work, and the V2s are being specifically designed for them. These are being tested in 22mm/23mm/24mm IDs with a few different nozzle sizes as well to give a better model to test some hypotheses that I have regarding efficiency versus creep.
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Old 11-09-2016, 10:08 AM   #26
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These are being tested in 22mm/23mm/24mm IDs with a few different nozzle sizes as well to give a better model to test some hypotheses that I have regarding efficiency versus creep.
If you decide to publish those results I'd be very interested

26.8 mm is a tad larger than the chamber then, I measured the AA chamber at 26.65 mm and it slides fairly well in the standard outer barrel (which, of a standard VSR, is 27 mm according to my measurements). I'm currently busy with a "VSR-X" build myself (hope the name isn't copyrighted ) and I've settled for the same dimensions as the stock outer barrel for both the barrel and the receiver. I'll be using a sleeve to accommodate a standard size cylinder but I bet one of those N60 cylinders could fit in it as well. Without a sleeve that is, as long as they've got (roughly) the same OD as the chamber.

There'd be more wear on the cylinder without a sleeve but 2 mm walls could handle that I reckon
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Old 11-09-2016, 10:11 PM   #27
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I imagine the N60 cylinder would handle it better than the action would Reliku. :)
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Old 07-13-2019, 05:01 PM   #28
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Do you guys think the inner Well MB03A receiver with a inner diameter of 26mm and the outer diameter of 34mm can be bored up to fit a 27mm N60 cylinder?
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