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All Springer/NP/PCP Air Gun Discussion General => Machine Shop Talk & AG Parts Machining => Topic started by: Rocker1 on February 09, 2017, 07:07:15 AM

Title: Threads and barrel sizes
Post by: Rocker1 on February 09, 2017, 07:07:15 AM
 Ok guys I am sure there is a number of us that have chased barrel diameter sizes an shroud and barrel threads. So Im going to post a fw here now and will be adding to it as we go along so please post what you can and hopefully we can get a usable list and maybe put it in the library for a on stop tell all instead of chasing them around.

 Prod shroud  11/16 x 24
Mrod shroud   13/16 x 28
 crosman barrel .437
GM barrel        .500
RWS               16mm
Taipan mutant  shroud  M28X1.0
Sumatra  barrel threads m10x1
  I have a heap more and will post them soon these are ones I remember sitting here and will add more today when I get in the shop. David
Title: Re: Threads and barrel sizes
Post by: Back_Roads on February 09, 2017, 09:41:16 AM
 Much appreciated  THANKS !
Title: Re: Threads and barrel sizes
Post by: Bill25 on May 02, 2017, 09:45:22 PM
Is taipan mutant/veteran shroud cap fits Vulcun & if threads 27*1mm or 28*1mm ?
Title: Re: Threads and barrel sizes
Post by: Rocker1 on May 03, 2017, 06:15:28 AM
28mm  is the number sir. David
Title: Re: Threads and barrel sizes
Post by: Bill25 on May 03, 2017, 09:23:25 AM
Thank you David  :D
Title: Re: Threads and barrel sizes
Post by: rsterne on May 03, 2017, 12:34:58 PM
Hatsan AT-44 barrel threads 1/2"-20 NF, surprisingly....

QB78 barrel is 14mm OD.... The Deluxe and the QB79 are 15mm OD....

Bob
Title: Re: Threads and barrel sizes
Post by: Rob M on May 04, 2017, 08:33:56 PM
the vulcan gen 2 is m14-1.25
the airmax plinkster is 10mm same as the Varmint
Title: Re: Threads and barrel sizes
Post by: Geronimo on May 11, 2017, 07:14:42 PM
shin sung fire 202 .357 m12x1
Title: Re: Threads and barrel sizes
Post by: Rocker1 on May 12, 2017, 06:50:01 AM
xs60 14.5    David
Title: Re: Threads and barrel sizes
Post by: jtrobb on January 20, 2018, 08:50:01 PM
My Artimus PP700 in .177 is M8x1.0
Title: Re: Threads and barrel sizes, thread revival
Post by: luge007 on November 12, 2019, 11:35:59 AM
I was looking to expand the capabilities of my Airforce Escape SS, so I bought an 18" barrel for it.

The barrel I received was an AirForce PN: U1030, .22 caliber "heavy barrel". The barrel measures .6250 (15.88mm) at the muzzle & .3090"od (7.86mm) at the breach end.  INCLUDED is a delrin cap that fits in the end of the receiver tube to finish it off, like the ones shown on the end of non-SS models, as well as new set screws and barrel bushings.

Though this barrel did not come threaded, but there is plenty of material to thread the muzzle 1/2-20 if desired.

 Hopefully somebody finds this info helpful.
Title: Re: Threads and barrel sizes
Post by: buddyb on November 12, 2019, 11:44:01 AM
Are Break Barrels threaded into the barrel assembly or pressed in?

Buddyb
Title: Re: Threads and barrel sizes
Post by: luge007 on November 12, 2019, 02:35:17 PM
I can not speak of all break barrels, but most of mine are pressed in. (one old unit from the 40's appears to be machined out of one piece)
Title: Re: Threads and barrel sizes
Post by: SILENT SQUIRREL on November 12, 2019, 05:59:24 PM
Diana Chaser & Bandit:   M10x1
Webley Nemesis:  1/2-20 UNC
Discovery & Maximus: Get a DonnyFl slip on ( it has a extra set screw for front sight)

Will explore ATI Nova Freedom & Liberty

Title: Re: Threads and barrel sizes
Post by: Back_Roads on November 16, 2019, 09:39:08 PM
 I have a custom shroud on my 18" heavy barrel Escape UL from https://www.rlairgunsupply.com/ (https://www.rlairgunsupply.com/) Keeps it quiet as long as your below the speed of sound, and your target doesn't react loudly ;)
Title: Re: Threads and barrel sizes
Post by: PakProtector on October 30, 2020, 10:47:45 PM
Doug's custom 30 cal, TJ's marauder barrel: 9/16-32.
cheers,
Douglas

Have a look on the interweb, fine thread taps are easy to find, and not so much money. I don't like disturbing the steel at, and just before the muzzle, so fine threads to cut, and a tap for the muffler nut/mount.

Title: Re: Threads and barrel sizes
Post by: Paul Stakun on January 20, 2022, 08:36:33 PM
What is the thread size of FX brass transfer ports?  I think they are all the same for all calibers, but I'm specifically interested in the .177.
Title: Re: Threads and barrel sizes
Post by: nervoustrigger on January 23, 2022, 10:45:00 AM
Quote from: Paul Stakun on January 20, 2022, 08:36:33 PM
What is the thread size of FX brass transfer ports?  I think they are all the same for all calibers, but I'm specifically interested in the .177.

From my notes on a .177 Crown:

brass thimble has female M12 x 1.0 thread (threads to steel barrel adapter)
steel barrel adapter has male M13 x 1.0 thread (threads to "barrel" which is really just a tube)
Title: Re: Threads and barrel sizes
Post by: GARY T on March 17, 2023, 03:43:44 AM
Anyone know the thread size on a BSA LONESTAR. 25?