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 44 users online :: 4 registered, 0 hidden and 40 guests


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

Registered users: Bing [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

o-ring 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

o-ring help

Unread postAuthor: spudtyrrant » Fri Apr 03, 2009 8:55 pm

i just have a simple problem i am redoing my 2 inch piston gun and i want to have a 2 inch plug held in by screws into a peice of 2 inch pipe i need to cut a o-ring groove and i was wondering the best way to go about doing that. btw if anyone knows what size o-ring i should use that would be helpful too
  • 0

User avatar
spudtyrrant
Colonel
Colonel
 
Posts: 550
Joined: Fri Jan 02, 2009 6:10 pm
Reputation: 0

Unread postAuthor: inonickname » Fri Apr 03, 2009 9:39 pm

A lathe and tooling is the best method, even if it's a wood lathe. Alternatively you could use a bolt and chuck it into a drill press (or even standard drill in a vice) then use hand held tooling or hold a chisel or similar in a vice.

If you don't have access to such machines you can mark a line, then use a hacksaw to cut the line (don't go through) and finish it up with a rounded or triangular file.

Use an o-ring that will stretch and still have some showing.
  • 0

PimpAssasinG wrote:no im strong but you are a fat gay mother sucker that gets raped by black man for fun
User avatar
inonickname
Lieutenant General
Lieutenant General
 
Posts: 2606
Joined: Sun Dec 07, 2008 3:27 am
Reputation: 0

Unread postAuthor: roboman » Fri Apr 03, 2009 10:33 pm

If you don't have access to a lathe, I would use a table saw. Just lower the blade to the desired groove depth, and rotate the piece over it, ,until the groove is uniform. I'm pretty sure that there are a couple of videos on youtube...
  • 0

User avatar
roboman
Sergeant Major
Sergeant Major
 
Posts: 176
Joined: Tue Nov 25, 2008 11:18 pm
Location: Long Beach, CA
Reputation: 0

Unread postAuthor: mark.f » Sat Apr 04, 2009 2:14 am

You can make an O-ring groove to sit in 2" PVC using 1-1/4" pipe/plugs and fittings.

Here's a 2" piston I made using this method. The O-ring sits on the 1-1/4" pipe or plug, and the couplers sandwich the ring in place. I usually use a few wraps of teflon tape in the groove as well to aid in sealing.

Image

It seals extremely well (no pressure drop over a 10 minute test, for me), and clide has even used this method to make chamber sealing pistons before.
  • 0

User avatar
mark.f
Donating Member
Donating Member
 
Posts: 3464
Joined: Sat May 06, 2006 11:18 am
Country: United States (us)
Reputation: 21

Unread postAuthor: i-will » Sat Apr 04, 2009 2:51 am

a while back i mentioned a (extremely) simple tool i made for makind easy o-ring grooves. http://www.spudfiles.com/forums/basic-f ... 16295.html

i hope it helps.
  • 0

WHY PAY FOR IT WHEN U CAN MAKE IT?
User avatar
i-will
2nd Lieutenant
2nd Lieutenant
 
Posts: 245
Joined: Tue Jul 22, 2008 3:04 am
Reputation: 0

Unread postAuthor: jmeyer1022 » Wed Apr 08, 2009 5:46 pm

Mark if you don't mind me asking what are the specs on your O-rings.
  • 0


jmeyer1022
2nd Lieutenant
2nd Lieutenant
 
Posts: 200
Joined: Sun Nov 09, 2008 4:50 pm
Reputation: 0

Unread postAuthor: Hubb » Wed Apr 08, 2009 5:52 pm

The easiest way I've found to make o-ring grooves is with mark's method above. The second easiest is by using a table saw. Set the blade to the proper depth, then work the piece over the blade. This is easier than a lathe.
  • 0

User avatar
Hubb
Major General
Major General
 
Posts: 2390
Joined: Mon May 28, 2007 8:39 am
Location: South Georgia
Reputation: 2

Sponsored

Sponsor
 


Unread postAuthor: Gippeto » Wed Apr 08, 2009 6:28 pm

Here's a handy little o-ring size chart for you. :)

http://www.acdepuydt.com/standard_seals ... _chart.htm
  • 0

"It could be that the purpose of your life is to serve as a warning to others" – unknown

Liberalism is a mental disorder, reality is it's cure.
User avatar
Gippeto
Donating Member
Donating Member
 
Posts: 2394
Joined: Sat Jan 19, 2008 10:14 am
Location: The Great White North...Canada eh!
Reputation: 11

Unread postAuthor: mark.f » Wed Apr 08, 2009 11:09 pm

jmeyer1022 wrote:Mark if you don't mind me asking what are the specs on your O-rings.


The O-rings are 2" OD x 3/16" wall. I ordered them from McMaster, and then finally found them in the Ace Hardware of a nearby town.
  • 0

User avatar
mark.f
Donating Member
Donating Member
 
Posts: 3464
Joined: Sat May 06, 2006 11:18 am
Country: United States (us)
Reputation: 21

Return to Pneumatic Cannon Discussion

Who is online

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

Reputation System ©'