American Air Arms

Jefferson State Air Rifles

predator-pellets

Neil Clague Air Strippers, Shrouds and LDCs

windmeister-ad

Wicked Air Rifles - Flex

Marmot Militia Machine Works

Author Topic: Any Interest in 6mm ? - Build Thread  (Read 2163 times)

sixshootertexan

  • Sr. Member
  • ****
  • Posts: 329
  • Ricky B
    • View Profile
Re: Any Interest in 6mm ? - Build Thread
« Reply #45 on: December 21, 2017, 09:57:35 PM »
Nicely done Bob. Hope it shoots well with that valve.
CCS 2300, CCS 2400, Custom Built Regulated .25, Custom Built PRod Clone, .308 Bullet shooter, XS46U .177

rsterne

  • Global Moderator
  • Hero Member
  • *****
  • Posts: 1328
  • Mozey-On-Inn and see what Coalmont has to offer!
    • View Profile
    • Mozey-On-Inn
Re: Any Interest in 6mm ? - Build Thread
« Reply #46 on: December 22, 2017, 07:09:53 PM »
Today I drilled all the holes for the valve in the long (unregulated) tube.... Here is the right side....



You can see the cocking slot for the hammer, and now you can see why I moved the side valve mounting holes forward, to give lots of material between it and the front of the slot.... here is the left side....



You can see the large hole for the gauge on the side.... I installed the valve, hammer, SSG assembly and trigger group today and tested everything.... With the hammer set for 1" of travel I still have 0.22" between the front of the hammer and the back of the valve, and about 1/16" between the cocking handle and the front of the slot.... This allows for 0.20" of maximum lift and still have a 0.020" gap for the SSG.... The valves have an internal travel of about 0.24", so with the stem protruding 0.20" the hammer will hit the back of the valve before anything else hits and gets damaged.... I also made the second valve body today....



The one in the foreground is for the shorter regulated tube.... Since there is a gauge downstream of the regulator in the tank block, there is no hole in the side of the valve for a gauge like there is in the valve for the unregulated tube in the back.... The valve in the front is also larger in diameter because the regulated tube is 0.095" wall instead of 0.120" wall....

Bob
  • Coalmont, BC

oldpro

  • Hero Member
  • *****
  • Posts: 1186
    • View Profile
Re: Any Interest in 6mm ? - Build Thread
« Reply #47 on: December 22, 2017, 08:44:37 PM »
 God thats a ton of work. Id have to charge 3k for a custom build like that maybe more.
  • Mount Shasta Ca.

Alan

  • Hero Member
  • *****
  • Posts: 1370
  • Set the example... Don't be one!
    • View Profile
    • Mobile Amateur Radio
Re: Any Interest in 6mm ? - Build Thread
« Reply #48 on: December 23, 2017, 03:03:36 AM »
Those who can are justly proud. Those who can't are at least jealous, if not envious. Guess which group I'm in?!
  • Roswell, New Mexico
Alan

I have an Omega compressor. If you're a fellow Guild member, and you pass through Roswell, NM, I'll fill your portable tank as a courtesy.

rsterne

  • Global Moderator
  • Hero Member
  • *****
  • Posts: 1328
  • Mozey-On-Inn and see what Coalmont has to offer!
    • View Profile
    • Mozey-On-Inn
Re: Any Interest in 6mm ? - Build Thread
« Reply #49 on: December 23, 2017, 08:23:47 AM »
The problem, Travis, as I'm sure I don't have to tell you, is that for every hour I spend machining, I spend a couple of hours thinking about the design and sitting at the computer doing and revising the drawings.... even though I did the basic design work during the summer, when I had no opportunity to work in the shop.... so I could start ordering the parts and materials....

A complete custom build like this is a challenge, but the satisfaction I get from seeing each piece fit and function the way it should replaces the toil with a sense of accomplishment.... so yes, I am very proud of it.... There are always things I know I could have done differently, or better.... but each of those experiences adds to my knowledge and hopefully improves the next project....

Long live projects....  8)

Bob
  • Coalmont, BC

rsterne

  • Global Moderator
  • Hero Member
  • *****
  • Posts: 1328
  • Mozey-On-Inn and see what Coalmont has to offer!
    • View Profile
    • Mozey-On-Inn
Re: Any Interest in 6mm ? - Build Thread
« Reply #50 on: December 23, 2017, 07:12:15 PM »
Last day in the shop before Christmas.... I tidied up all the loose ends.... no photos because there was nothing new, just a second batch of what I have already made.... I built all the internals for my second ART/SS valve (my version), and drilled the holes in the short (regulated) tube to mount the valve.... Other than cut that tube to length (after I get the regulator for my 500 cc CF tank) and drill the 4 holes to retain the tank block, both "lowers" are now pretty much finished.... I am waiting for some 70D O-rings, once they arrive I will be able to assemble and pressure test them.... Oh, I forgot I still have to lap the valve seats and make sure the poppet face is square....

I finalized the design for the receivers today.... The material I bought wasn't tall enough to allow for slope in the scope dovetail, but fortunately I have enough 1 x 1.5" aluminum bar stock for the two receivers.... The scope rail will be angled 20 MOA to put the scope pretty much on optical center with a POA of 100 yards.... These are both single-shot guns, and I wanted to make both receivers identical and yet set one up for 6mm and the other for .257.... I plan to use an "L" shaped insert in the loading area, sized for each caliber, that will bolt into place.... The left hand wall of the receiver will be full height to increase rigidity, the bullet will load from the right, like on my Monocoque.... at least that's the plan at the moment....

I want to wish all my friends here on the Forums all the best for a Merry Christmas and a Happy New Year....  8)

Bob
  • Coalmont, BC

Nvreloader

  • Jr. Member
  • **
  • Posts: 78
    • View Profile
Re: Any Interest in 6mm ? - Build Thread
« Reply #51 on: December 24, 2017, 09:16:10 AM »
Bob

Thank you for ALL you have done for ALL of us, You have set the bar very high,
very few can even see to that level.

May you and yours have a very Happy and Merry Holidays,

Your friend,
Don
  • Western NV
NRA Life member

"We must reject the idea that every time a law's broken, society is guilty rather than the lawbreaker.
It is time to restore the American precept, that each individual is accountable for their actions"
Ronald Reagan

"Speeds fine, but Accuracy is final"

oldpro

  • Hero Member
  • *****
  • Posts: 1186
    • View Profile
Re: Any Interest in 6mm ? - Build Thread
« Reply #52 on: December 26, 2017, 07:03:19 PM »
 When are your valve orings going to show up?
  • Mount Shasta Ca.

rsterne

  • Global Moderator
  • Hero Member
  • *****
  • Posts: 1328
  • Mozey-On-Inn and see what Coalmont has to offer!
    • View Profile
    • Mozey-On-Inn
Re: Any Interest in 6mm ? - Build Thread
« Reply #53 on: December 26, 2017, 08:33:14 PM »
Maybe tomorrow.... I guess the return spring has to be strong enough to move the poppet, to allow it to close to fill?....

Bob
  • Coalmont, BC

oldpro

  • Hero Member
  • *****
  • Posts: 1186
    • View Profile
Re: Any Interest in 6mm ? - Build Thread
« Reply #54 on: December 26, 2017, 10:23:30 PM »
Maybe tomorrow.... I guess the return spring has to be strong enough to move the poppet, to allow it to close to fill?....

Bob
Yes. doest take much also Krytox on the orings is highly recommended.
  • Mount Shasta Ca.

rsterne

  • Global Moderator
  • Hero Member
  • *****
  • Posts: 1328
  • Mozey-On-Inn and see what Coalmont has to offer!
    • View Profile
    • Mozey-On-Inn
Re: Any Interest in 6mm ? - Build Thread
« Reply #55 on: December 27, 2017, 08:52:46 AM »
I have some Dow 55 O-ring lube I use on all O-rings.... should be OK?.... Never seen Krytox around here....

How heavy a spring do you use?.... like a ball-point pen spring or heavier?....

Bob
  • Coalmont, BC

oldpro

  • Hero Member
  • *****
  • Posts: 1186
    • View Profile
Re: Any Interest in 6mm ? - Build Thread
« Reply #56 on: December 27, 2017, 06:20:42 PM »
1lb
  • Mount Shasta Ca.

oldpro

  • Hero Member
  • *****
  • Posts: 1186
    • View Profile
Re: Any Interest in 6mm ? - Build Thread
« Reply #57 on: January 02, 2018, 07:03:00 PM »
 Dont make me drive up there and finish this thing for you!!!
  • Mount Shasta Ca.

rsterne

  • Global Moderator
  • Hero Member
  • *****
  • Posts: 1328
  • Mozey-On-Inn and see what Coalmont has to offer!
    • View Profile
    • Mozey-On-Inn
Re: Any Interest in 6mm ? - Build Thread
« Reply #58 on: January 02, 2018, 07:37:04 PM »
Assembled the .257 (unregulated) tube and at 4200 psi blew the poppet apart.... the large O-ring broke off the side of the gland.... I have to redesign the poppet and make a new, stronger one.... The good news is that it would open with dropping a 60 gram hammer down the tube 10" (no spring)....

Bob
  • Coalmont, BC

oldpro

  • Hero Member
  • *****
  • Posts: 1186
    • View Profile
Re: Any Interest in 6mm ? - Build Thread
« Reply #59 on: January 02, 2018, 09:07:04 PM »
Assembled the .257 (unregulated) tube and at 4200 psi blew the poppet apart.... the large O-ring broke off the side of the gland.... I have to redesign the poppet and make a new, stronger one.... The good news is that it would open with dropping a 60 gram hammer down the tube 10" (no spring)....

Bob
Good news to people who understand the clamping force on a poppet at those pressures. What’s your thoughts on making it hold up? Steel piston with peek insert for piston face maybe?
« Last Edit: January 02, 2018, 09:58:19 PM by oldpro »
  • Mount Shasta Ca.