Login    Register
User Information
Username:
Password:
We are a free and open
community, all are welcome.
Click here to Register
Sponsored
Who is online

In total there are 73 users online :: 6 registered, 0 hidden and 67 guests


Most users ever online was 155 on Mon Aug 15, 2016 1:40 am

Registered users: Bing [Bot], Google [Bot], Google Adsense [Bot], Majestic-12 [Bot], MSNbot Media, Yahoo [Bot] based on users active over the past 5 minutes

The Team
Administrators
Global Moderators
global_moderators.png CS

O-ring on a homemade pump.

Post questions and info about pneumatic (compressed gas) powered cannons here. This includes discussion about valves, pipe types, compressors, alternate gas setups, and anything else relevant.
Sponsored 
  • Author
    Message

O-ring on a homemade pump.

Unread postAuthor: Mitchza89 » Sun Jan 06, 2008 8:33 pm

Hey guys,

I've been trying to make a homemade stirrip pump for a week now. I've tried a few different thanks for the plunger chamber because I just can't find any O-rings to fit the pipe....there either too big or too small.

Anyone know the best solution to this problem?
  • 0

Image
User avatar
Mitchza89
Brigadier General
Brigadier General
 
Posts: 1056
Joined: Tue Jan 09, 2007 12:05 am
Reputation: 0

Unread postAuthor: elitesniper » Sun Jan 06, 2008 8:36 pm

o ring grooves?
  • 0

User avatar
elitesniper
Brigadier General
Brigadier General
 
Posts: 1090
Joined: Sat Oct 13, 2007 8:40 pm
Reputation: 0

Unread postAuthor: Novacastrian » Sun Jan 06, 2008 8:42 pm

Well the best solutions would be to 1. Buy a stirrup pump
2. Find the correct sized o'rings 3. Make your own o'rings 4. Make an epoxy piston 5. Make a "flared" piston (like an upside down suction cup).
That's about all i have got for ya mate.
  • 0

America, the greatest gangster of all time. With 200 million odd foot soldiers at it's whim and call.
When you fill your car with refined oil remember that it has been paid for with blood and guts, some from your own countrymen, most not.

Novacastrian
Major General
Major General
 
Posts: 1604
Joined: Sat Aug 11, 2007 6:59 pm
Reputation: 0

Unread postAuthor: cwazy1 » Sun Jan 06, 2008 8:42 pm

well he already tried that and it doesnt work. .

i've heard that you can cut orings and then glue them together. i dunno.
  • 0

I bought a signature twice because I was an idiot. 600 bux =(

cwazy1
Captain
Captain
 
Posts: 305
Joined: Mon Sep 10, 2007 8:31 pm
Reputation: 0

Unread postAuthor: Novacastrian » Sun Jan 06, 2008 8:45 pm

cwazy1 wrote:i've heard that you can cut orings and then glue them together. i dunno.


Yes you can, quite successfully too.
Just cut a big one, remove a section and super glue it back together :P
  • 0

America, the greatest gangster of all time. With 200 million odd foot soldiers at it's whim and call.
When you fill your car with refined oil remember that it has been paid for with blood and guts, some from your own countrymen, most not.

Novacastrian
Major General
Major General
 
Posts: 1604
Joined: Sat Aug 11, 2007 6:59 pm
Reputation: 0

Unread postAuthor: cwazy1 » Sun Jan 06, 2008 8:58 pm

lol thats what the guys at ace tell me, i still refuse to listen to that cuz well lest just say my ace has a billion sizes of orings.
  • 0

I bought a signature twice because I was an idiot. 600 bux =(

cwazy1
Captain
Captain
 
Posts: 305
Joined: Mon Sep 10, 2007 8:31 pm
Reputation: 0

Unread postAuthor: Hotwired » Sun Jan 06, 2008 9:16 pm

Novacastrian wrote:Well the best solutions would be to 1. Buy a stirrup pump

I'm feeling vexed by the way floor pumps either exist at fairly high volume and up to 250psi or miniscule volume and up to 300bar...

Someone needs to invent a popular industrial or home appliance that requires a floor pump that does up to 1000psi at a respectable volume per stroke.

Then it'll be cookies all round :)
  • 0

User avatar
Hotwired
Lieutenant General
Lieutenant General
 
Posts: 2599
Joined: Fri Oct 13, 2006 5:51 am
Location: UK
Reputation: 0

Sponsored

Sponsor
 


Unread postAuthor: cwazy1 » Sun Jan 06, 2008 9:33 pm

lol @ cookies all round
  • 0

I bought a signature twice because I was an idiot. 600 bux =(

cwazy1
Captain
Captain
 
Posts: 305
Joined: Mon Sep 10, 2007 8:31 pm
Reputation: 0

Unread postAuthor: Hawkeye » Sun Jan 06, 2008 9:35 pm

What are you using for the chamber? Using 3/4 inch copper(thinner walled) will allow you to find a suitable o-ring.
  • 0


Hawkeye
Lieutenant Colonel
Lieutenant Colonel
 
Posts: 462
Joined: Sun Jan 21, 2007 7:12 pm
Reputation: 0

Unread postAuthor: elitesniper » Sun Jan 06, 2008 9:49 pm

hey whats the difference between a shock pump and a stirrup anyways?
  • 0

User avatar
elitesniper
Brigadier General
Brigadier General
 
Posts: 1090
Joined: Sat Oct 13, 2007 8:40 pm
Reputation: 0

Unread postAuthor: cwazy1 » Sun Jan 06, 2008 9:50 pm

stirrup is a floor pump, shock pump is a tiny little sucker.
  • 0

I bought a signature twice because I was an idiot. 600 bux =(

cwazy1
Captain
Captain
 
Posts: 305
Joined: Mon Sep 10, 2007 8:31 pm
Reputation: 0

Unread postAuthor: Hawkeye » Sun Jan 06, 2008 9:51 pm

Nothing. A stirrup pump is just scaled up so that you stand on "stirrups". The actual pump design is identical.
  • 0


Hawkeye
Lieutenant Colonel
Lieutenant Colonel
 
Posts: 462
Joined: Sun Jan 21, 2007 7:12 pm
Reputation: 0

Unread postAuthor: Mitchza89 » Sun Jan 06, 2008 10:44 pm

Hey lads, sorry for the no reply. I've tried gal pipe, 1/2in poly pipe and 3/4in copper pipe. The copper pipe was the thick walled stuff I think (well I know it was the cheap imported crap from China), it couldn't even fit a 16mm marble in there. I hunted around for a long time but had no luck. Eh this is rather depressing :(
  • 0

Image
User avatar
Mitchza89
Brigadier General
Brigadier General
 
Posts: 1056
Joined: Tue Jan 09, 2007 12:05 am
Reputation: 0

Unread postAuthor: elitesniper » Sun Jan 06, 2008 10:46 pm

what about sch 80 pvc pipe?
  • 0

User avatar
elitesniper
Brigadier General
Brigadier General
 
Posts: 1090
Joined: Sat Oct 13, 2007 8:40 pm
Reputation: 0

Unread postAuthor: Mitchza89 » Sun Jan 06, 2008 10:47 pm

Nah I havn't tried that stuff. I might give it a go but eh, I wanna make it out of copper (makes it look fancy) :D
  • 0

Image
User avatar
Mitchza89
Brigadier General
Brigadier General
 
Posts: 1056
Joined: Tue Jan 09, 2007 12:05 am
Reputation: 0

Next

Return to Pneumatic Cannon Discussion

Who is online

Registered users: Bing [Bot], Google [Bot], Google Adsense [Bot], Majestic-12 [Bot], MSNbot Media, Yahoo [Bot]

Reputation System ©'