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Machined PCP

Built a pneumatic cannon? Then post it here! This section is for completed, finished cannons that you have built. Please include pictures and information.
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Is it any Good?

Yes
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No
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Total votes : 12
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Machined PCP

Unread postAuthor: Goats spudz » Tue Apr 17, 2012 1:59 pm

Heres my new pcp that im building, im getting the barrel next week and the grub screws to hold the valve in, all the parts were machined in a Hurco TMM10 except for the custom valve head which was made on a Myford super 7, also i will blue all the steel parts when im finished and hand craft a walnut stock or maybe a milled aluminium one.
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Attachments
P1011017.JPG
Knurled Filler cap
P1011018.JPG
1/8" bsp
P1011019.JPG
Standard crosman 2250 valve
P1011021.JPG
piercing pin cut off
P1011022.JPG
Custom valve head
P1011023.JPG
where the spring sits...
P1011024.JPG
assembled custom valve
P1011025.JPG
Filler check valve, will be replaced with a better one in the near future
P1011026.JPG
Gas tube with o-rings Grooved in
P1011027.JPG
o-ring closeup
P1011028.JPG
3/8" bsp threads, a bit rough as the tube ID was .5mm bigger than the tapping drill size
P1011029.JPG
Check valve seat screwed in
P1011030.JPG
Spring
P1011031.JPG
Other angle
P1011032.JPG
Check valve assembled with 3/8" bsp - 1/8" bsp fitting and bonded seal
P1011036.JPG
Filler/Dust cap, for aesthetics
P1011037.JPG
Valve portion assembled, need 2 grub screws to stop the valve flying out
P1011039.JPG
How i pressurize my input, can fill my chamber to 100 bar in 20 seconds
P1011040.JPG
Filling the input co2 tank to 250 psi, regged down to 5 bar
Where's my Chuck key?

Goats spudz
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Unread postAuthor: Brian the brain » Tue Apr 17, 2012 2:07 pm

Gasp!
:D

Can't wait to get my butt kicked!
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Gun Freak wrote:
Oh my friggin god stop being so awesome, that thing is pure kick ass. Most innovative and creative pneumatic that the files have ever come by!

Can't ask for a better compliment!!
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Unread postAuthor: Goats spudz » Tue Apr 17, 2012 2:10 pm

Brian the brain wrote:Gasp!
:D

Can't wait to get my butt kicked!
:D !
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Where's my Chuck key?

Goats spudz
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Unread postAuthor: jackssmirkingrevenge » Tue Apr 17, 2012 2:16 pm

Yay for machined projects, looking forward to see the finished results :)
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Unread postAuthor: Goats spudz » Tue Apr 17, 2012 2:20 pm

jackssmirkingrevenge wrote:Yay for machined projects, looking forward to see the finished results :)
Did you spot the epoxy on the check valve? :D
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Where's my Chuck key?

Goats spudz
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Unread postAuthor: Brian the brain » Tue Apr 17, 2012 2:23 pm

Why the poll though?

or should I say:

Y U NO CONFIDENCE?!?!?

Looking supersweet!!
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Gun Freak wrote:
Oh my friggin god stop being so awesome, that thing is pure kick ass. Most innovative and creative pneumatic that the files have ever come by!

Can't ask for a better compliment!!
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Unread postAuthor: jackssmirkingrevenge » Tue Apr 17, 2012 2:30 pm

Goats spudz wrote:Did you spot the epoxy on the check valve? :D


No reason why high strength adhesives and machining can't go hand in hand ;)
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Unread postAuthor: Goats spudz » Tue Apr 17, 2012 2:46 pm

jackssmirkingrevenge wrote:
Goats spudz wrote:Did you spot the epoxy on the check valve? :D


No reason why high strength adhesives and machining can't go hand in hand ;)
seen as it dosen't bare pressure, well yes :)
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Where's my Chuck key?

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Unread postAuthor: Labtecpower » Tue Apr 17, 2012 3:22 pm

nice work :)
I hope I can make something similar after the summer holidays!
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"ñøw mÿ šįg šüçkś!"
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Unread postAuthor: Gun Freak » Tue Apr 17, 2012 4:25 pm

Looking good man! Looking forward to more!
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Unread postAuthor: Goats spudz » Tue Apr 17, 2012 4:33 pm

Did a quick function test at 70 psi held the valve in with my hand and its quite powerfull, bear in mind this things going to be run at 1500 psi also the grub screws and m6 tap im getting tomorrow and the 24" rifled barrel in .22 im getting next week for free with a steel breech courtesy of a good friend who owns a gun shop :D
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Where's my Chuck key?

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Unread postAuthor: Zeus » Tue Apr 17, 2012 7:13 pm

Good work, but you said you'll blue it. I'll change my vote if you don't.
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/sarcasm, /hyperbole
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Unread postAuthor: Goats spudz » Wed Apr 18, 2012 1:50 am

Zeus wrote:Good work, but you said you'll blue it. I'll change my vote if you don't.
I did a test on some other tube it gives a sexy firearm finish and is polishable


edit: ok, just got back, i have drilled the grub screw holes and tapped them.
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Where's my Chuck key?

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Unread postAuthor: Brian the brain » Wed Apr 18, 2012 1:35 pm

The idea of the tube inside of a tube is simply brilliant!

It solved my problem..

I've got the solution for a balance act between a chambersealing valve and a hammervalve inside a tube.
I could not figure out how to get the sealing edge inside of the main tube for the piston to seal on.
the hammervalve will be counterbalanced in the rear of the piston and the diameter will be balancing out the main piston to about 80 to 90%,
Not only cutting down the pilot volume to less than what you'd think would be minimal but also scaling up the pilot valve massively compared to this reduced volume..without making it harder to open...


you've just helped me to figure it all out!!

please excuse me for wandering off topic a bit.
I'll be watching your build like a hawk!
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Gun Freak wrote:
Oh my friggin god stop being so awesome, that thing is pure kick ass. Most innovative and creative pneumatic that the files have ever come by!

Can't ask for a better compliment!!
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Unread postAuthor: Goats spudz » Wed Apr 18, 2012 2:49 pm

Brian the brain wrote:The idea of the tube inside of a tube is simply brilliant!

It solved my problem..

I've got the solution for a balance act between a chambersealing valve and a hammervalve inside a tube.
I could not figure out how to get the sealing edge inside of the main tube for the piston to seal on.
the hammervalve will be counterbalanced in the rear of the piston and the diameter will be balancing out the main piston to about 80 to 90%,
Not only cutting down the pilot volume to less than what you'd think would be minimal but also scaling up the pilot valve massively compared to this reduced volume..without making it harder to open...


you've just helped me to figure it all out!!

please excuse me for wandering off topic a bit.
I'll be watching your build like a hawk!
Also if you dont own a shop compressor you can fill a soda stream tank and reg it down like i did, eliminating the need for a first stage!

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Where's my Chuck key?

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