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 71 users online :: 5 registered, 0 hidden and 66 guests


Most users ever online was 218 on Wed Dec 07, 2016 6:58 pm

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

The Team
Administrators
Global Moderators
global_moderators.png CS

Piston Help

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

Piston Help

Unread postAuthor: Engineererrrr » Wed Feb 01, 2012 10:28 pm

Im sorry i cant seem to find how to make a piston for a coaxial piston valve cannon anywhere. I want to build a piston that is air tight on copper pipes and for a 3/4" sized chamber. Can anyone tell me how to make one and keeping in mind i am restricted of resources. Any help is appreciated.
  • 0


Engineererrrr
Private
Private
 
Posts: 18
Joined: Thu Aug 04, 2011 10:27 pm
Reputation: 0

Re: Piston Help

Unread postAuthor: evanmcorleytv » Wed Feb 01, 2012 10:40 pm

Engineererrrr wrote:Im sorry i cant seem to find how to make a piston for a coaxial piston valve cannon anywhere. I want to build a piston that is air tight on copper pipes and for a 3/4" sized chamber. Can anyone tell me how to make one and keeping in mind i am restricted of resources. Any help is appreciated.


You can get a section of pipe, put some grease inside of it, and either fill it with hot glue, or epoxy, wait for it to dry/cure, then push it out of the section of pipe, and then glue/epoxy a piece of neoprene rubber to the front of the newly formed piston.
  • 0


evanmcorleytv
Major
Major
 
Posts: 350
Joined: Sat Jun 19, 2010 3:44 pm
Location: Tuscaloosa, AL
Reputation: 0

Unread postAuthor: Engineererrrr » Wed Feb 01, 2012 11:17 pm

wow i never thought of it that way! thanks. but where can i get some neoprene rubber?

I heard of pistons made from threaded rods or bolts do you know anything of that?
  • 0


Engineererrrr
Private
Private
 
Posts: 18
Joined: Thu Aug 04, 2011 10:27 pm
Reputation: 0

Unread postAuthor: DerpWithAGun » Wed Feb 01, 2012 11:56 pm

lHere you go Engineererrr! This is my old thread a made a while back for one of my old piston valves. Second page, first post. Shows you what a bolt and washer piston looks like. (You don't need that white PVC looking part on it)

EDIT: LOL forgot the link silly me

http://www.spudfiles.com/forums/piston- ... rt,15.html
  • 0


DerpWithAGun
Sergeant First Class
Sergeant First Class
 
Posts: 144
Joined: Sat Jul 30, 2011 10:11 am
Reputation: 0

Unread postAuthor: Technician1002 » Thu Feb 02, 2012 12:28 am

How restricted on resources are you? Do you have access to a drill press?

This is in the stickies.
http://www.spudfiles.com/forums/tutorial-making-a-small-o-ringed-piston-on-a-drill-press-t21740.html
  • 0

User avatar
Technician1002
Chief of Staff
Chief of Staff
 
Posts: 5190
Joined: Sat Apr 04, 2009 11:10 am
Reputation: 14

Unread postAuthor: sharpshooter11000 » Thu Feb 02, 2012 2:56 am

For my firs co-ax I got a machinist that lives near me to machine a solid nylon piston and then I glued some random rubber on that I found in the shed :)
  • 0

User avatar
sharpshooter11000
2nd Lieutenant
2nd Lieutenant
 
Posts: 248
Joined: Sat Aug 06, 2011 1:34 pm
Location: UK
Country: United Kingdom (uk)
Reputation: 2

Unread postAuthor: jackssmirkingrevenge » Thu Feb 02, 2012 3:07 am

  • 0

User avatar
jackssmirkingrevenge
Donating Member
Donating Member
 
Posts: 24225
Joined: Thu Mar 15, 2007 11:28 pm
Country: Holy See (Vatican City State) (va)
Reputation: 66

Sponsored

Sponsor
 


Unread postAuthor: Engineererrrr » Thu Feb 02, 2012 10:00 pm

all this is help full but again limited thanks everyone.
I dont even know what a drill press is.
The bolt and washer: what are the parts to it? where can i get rubber discs? Are there already perfect sizes of washers for my purpose?
I could try epoxy...

my idea from this info: Take a length of pipe (my chamber diameter) somehow get a rubber disc and the fill pipe with hot glue then epoxy on the rubber. Good or bad?

For my purpose whats the better piston concept? Bolts and washers or epoxy/hot glue

sigh...im quite inexperienced but ima fast learner
  • 0


Engineererrrr
Private
Private
 
Posts: 18
Joined: Thu Aug 04, 2011 10:27 pm
Reputation: 0

Unread postAuthor: Gun Freak » Thu Feb 02, 2012 10:26 pm

Image
Image
Image
Image
  • 0

OG Anti-Hybrid
One man's trash is a true Spudder's treasure!
Golf Ball Cannon "Superna"M16 BBMGPengunHammer Valve Airsoft SniperHigh Pressure .22 Coax
Holy Shat!
User avatar
Gun Freak
Lieutenant General
Lieutenant General
 
Posts: 4969
Joined: Mon Jan 25, 2010 4:38 pm
Location: Florida
Country: United States (us)
Reputation: 11

Return to Pneumatic Cannon Discussion

Who is online

Registered users: Bing [Bot], Exabot [Bot], Google [Bot], MSNbot Media, Yahoo [Bot]

Reputation System ©'