30 bar 435psi pengun

Show us your pneumatic spud gun! Discuss pneumatic (compressed gas) powered potato guns and related accessories. Valve types, actuation, pipe, materials, fittings, compressors, safety, gas choices, and more.
DasAbonnent
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Sun Sep 14, 2014 4:00 am

Hey,
i want to share one of my projects with you, it's a pengun made out of a ........PEN!
Image


I can pump it up to 435psi (max of my pump;-)). It's got a tiny QEV inside, triggered by a shrader valve. The cap hides the valve. It has got a small pin inside, that releases the air, when you press it onto the valve.

Image

The barrel is a 2mm aluminium tube. It can fire small steel balls (from ball bearings), toothpicks and nails.



Here's a video of firing it=)


If you've got any ideas, criticism, questions, suggestions, tell me!:)
Last edited by DasAbonnent on Thu Sep 18, 2014 8:11 am, edited 1 time in total.
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n05gr0th
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Mon Sep 15, 2014 4:18 pm

Awesome design! Where did you find ammo small enough to shoot out of that tiny barrel? And what did you construct your piston out of?
DasAbonnent
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Thu Sep 18, 2014 8:10 am

Thanks=)
The piston is a small cylindric piece of rubber.
As ammo i'm using toothpicks or steel balls from ball bearings. Nails would also work
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n05gr0th
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Thu Sep 18, 2014 8:29 am

Any idea about the velocity it hits at 435 psi?
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jackssmirkingrevenge
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Wed Sep 24, 2014 7:34 am

Nice job, you need a higher pressure pump though ;)
hectmarr wrote:You have to make many weapons, because this field is long and short life
DasAbonnent
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Fri Oct 03, 2014 6:40 am

I'm wondering what pressure such a ball pen will hold before bursting;) what do you think?
TrollingCluckster123
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Tue Nov 11, 2014 11:07 am

You know that pens are not rated for pressure, right? If that pen were to fail while you were holding it your hand would be very badly injured. If it's not pressure rated, do NOT use it.
BartSkillZ
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Tue Nov 25, 2014 10:46 am

Hi there,

How do you make/Where can you get that mini Quick Exhaust Valve (QEV)?

Thanks for helping
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Brian the brain
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Wed Nov 26, 2014 3:12 pm

I'm guessing the mini QEV is nothing more than a solid rubber disc.
That's what I've used on my coaxials.
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!!
Donal
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Fri Jul 03, 2015 8:08 am

Nice exercise of ingenuity...good werk.
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