Find fields & stores near you!
Find fields and stores
Zipcode
PbNation News
PbNation News
Community Focus
Community Focus

Reply
 
Thread Tools
Old 09-29-2010, 05:51 PM #1
samuelkeesee12
 
 
samuelkeesee12's Avatar
 
Join Date: Jan 2009
Location: Kentucky
Tolerance ?

Is there a sticky somewhere about o-ring tolerances? I have looked through all the stickies and can't find it. I know I saw one somewhere before but I can't seem to find it now. Also does anyone have any pointers for selecting o-rings?
samuelkeesee12 is offline   Reply With Quote
Old Sponsored Links Remove Advertisement
Advertisement
Old 09-29-2010, 05:57 PM #2
KansasCityRellik
 
 
KansasCityRellik's Avatar
 
Join Date: Mar 2007
Location: 816 - KillaCity
Don't use Buna o-rings on dynamic seals. They work good for static seals but definitely go with Urethane or Polyurethane on the dynamic ones. I.E. Bolt Sail
__________________
-81SICCNESS-
Shocker NXT
KansasCityRellik is offline   Reply With Quote
Old 09-29-2010, 06:18 PM #3
Ant_Diggity
Juggalo Rydas *****
 
Ant_Diggity's Avatar
 
Join Date: Sep 2008
Location: Washington
I just ordered some o-rings from o-ring monkey. they are decently priced and work perfectly. there's also a few different options to which o-ring you can buy if you don't need o-rings for the entire gun. http://oringmonkey.com/
__________________
NXT
Ant_Diggity is offline   Reply With Quote
Old 09-29-2010, 06:31 PM #4
samuelkeesee12
 
 
samuelkeesee12's Avatar
 
Join Date: Jan 2009
Location: Kentucky
Yes but I'm talking about o-ring tolerances, or how "tight" o-rings fit. I have heard buna o-rings are fine for any seal.
samuelkeesee12 is offline   Reply With Quote
Old 09-29-2010, 07:13 PM #5
SpeedsCustom-PB
I Engineer
 
SpeedsCustom-PB's Avatar
 
Join Date: Mar 2007
Location: Clean Jersey
SpeedsCustom-PB supports our troops
While true, a part that is moving should use a stronger o-ring; Urethane or Polyurethane. It will hold up better since their will be friction.

-Speed
__________________
  • Pm me about Anodizing 2013
www.SpeedsCustom-PB.com (Currently down, will be back up)

SpeedsCustom's Smart Parts Shocker SFT/NXT Frame

LongLive Paintball OLD BRIDGE NJ
SpeedsCustom-PB is offline   Reply With Quote
Old 09-29-2010, 07:34 PM #6
KansasCityRellik
 
 
KansasCityRellik's Avatar
 
Join Date: Mar 2007
Location: 816 - KillaCity
Buna do seal great and they are cheap. However; I had horrible consistency problems on my Shocker NXT shortly after rebuilding it entirely with Buna o-rings. The tolerances of the Buna on the inner firing chamber seemed to be off slightly. (Bolt seemed to be loose and did not shoot as 'crisp'). I changed all of them to the green (Therban) o-rings, as well as changing the bolt guide and bolt sail o-rings to urethane or polyurethane. All my problems went away.

Just to confirm the problem, I changed a couple of them back to Buna one at a time. For some reason the Buna just wouldn't work right anywhere the was a dynamic seal. Horrible bolt stick and inconsistencies, especially when the bolt sail was a Buna. When it wasn't sticking, the chrono was dropping off 80-100fps every 2 or 3 shots.
__________________
-81SICCNESS-
Shocker NXT
KansasCityRellik is offline   Reply With Quote
Old 09-30-2010, 03:33 AM #7
Gisgo09
vGisgo
 
Gisgo09's Avatar
 
Join Date: Apr 2006
Location: Livonia, MI
The section you want is in the first page of the spring mod page (not the one in the stickies).
__________________
Assumption is the mother of all **** ups.
"Thats a lot of Romans over there." "Yes but not one of them is Gisgo." Hannibal Barca and general Gisgo before the battle of Cannae in 216 BC.

http://www.lurkerpb.com/
Gisgo09 is offline   Reply With Quote
Old 09-30-2010, 03:41 PM #8
timmyfreek
Ronin
 
timmyfreek's Avatar
 
Join Date: Jul 2005
timmyfreek supports Cereal Killerz 2
dose anyone know were to get urethane or polyurethane orings? oring monkey only has buna
timmyfreek is offline   Reply With Quote
Old 09-30-2010, 04:03 PM #9
KansasCityRellik
 
 
KansasCityRellik's Avatar
 
Join Date: Mar 2007
Location: 816 - KillaCity
I've used www.mcmaster.com before. Prices are pretty fair and they don't charge extra for small orders.
__________________
-81SICCNESS-
Shocker NXT
KansasCityRellik is offline   Reply With Quote
Old 09-30-2010, 04:28 PM #10
timmyfreek
Ronin
 
timmyfreek's Avatar
 
Join Date: Jul 2005
timmyfreek supports Cereal Killerz 2
cool thanks. i never thought to check them for orings, my dad buys stuf from there all the time. lol
timmyfreek is offline   Reply With Quote
Old 09-30-2010, 07:02 PM #11
samuelkeesee12
 
 
samuelkeesee12's Avatar
 
Join Date: Jan 2009
Location: Kentucky
Another question related to o-rings. On zdspb.com it says the outer can o-rings are 22, but on ndz website their o-ring kits have 23. I even emailed them to see which it was and they said 23. I tried to go to smart parts website, but it was down. Which size go on the outer can o-rings?
samuelkeesee12 is offline   Reply With Quote
Old 09-30-2010, 07:36 PM #12
Ant_Diggity
Juggalo Rydas *****
 
Ant_Diggity's Avatar
 
Join Date: Sep 2008
Location: Washington
I use 22 and they fit perfect, 23 might be too big
__________________
NXT
Ant_Diggity is offline   Reply With Quote
Old 09-30-2010, 07:40 PM #13
The mielke way
 
 
The mielke way's Avatar
 
Join Date: Jun 2006
Location: Parker,CO
Annual Supporting Member
22 is the correct size. I have about a hundred or so of them so I know they are correct.
The mielke way is offline   Reply With Quote
Old 09-30-2010, 07:46 PM #14
KansasCityRellik
 
 
KansasCityRellik's Avatar
 
Join Date: Mar 2007
Location: 816 - KillaCity
I have a stock HE can and it uses 22s. No idea if an NDZ can is any different.


"22's son!, 22's!"
__________________
-81SICCNESS-
Shocker NXT
KansasCityRellik is offline   Reply With Quote
Old 09-30-2010, 07:46 PM #15
The mielke way
 
 
The mielke way's Avatar
 
Join Date: Jun 2006
Location: Parker,CO
Annual Supporting Member
www.oringsusa.com is the best place I have found to get them. I get the green HNBR-70 orings in bulk for cheap.
The mielke way is offline   Reply With Quote
Old 09-30-2010, 07:48 PM #16
The mielke way
 
 
The mielke way's Avatar
 
Join Date: Jun 2006
Location: Parker,CO
Annual Supporting Member
I have the NDZ can and it is 22-70.
The mielke way is offline   Reply With Quote
Old 09-30-2010, 07:50 PM #17
KansasCityRellik
 
 
KansasCityRellik's Avatar
 
Join Date: Mar 2007
Location: 816 - KillaCity
8c a pop for those 17/70s. Damn, that is cheap. Score.
__________________
-81SICCNESS-
Shocker NXT
KansasCityRellik is offline   Reply With Quote
Old 09-30-2010, 08:02 PM #18
The mielke way
 
 
The mielke way's Avatar
 
Join Date: Jun 2006
Location: Parker,CO
Annual Supporting Member
I bought 100 of the 17-70 and 15-70 for like $15.00 and replace them every time I play since they are the only dynamic orings. cant get much cheaper. And with the HNBR I never have leaks. Just make sure they have enough in the inventory column to the right.
The mielke way is offline   Reply With Quote
Old 09-30-2010, 09:09 PM #19
ccluff2
 
 
ccluff2's Avatar
 
Join Date: Jan 2005
Quote:
Originally Posted by The mielke way View Post
I bought 100 of the 17-70 and 15-70 for like $15.00 and replace them every time I play since they are the only dynamic orings. cant get much cheaper. And with the HNBR I never have leaks. Just make sure they have enough in the inventory column to the right.
12/70 on the bolt guide and 16/70 on the bolt sail are dynamic as well. That is a great find and I will be buying those therban orings here soon.
__________________
****The Machined IPR Mod for Shockers****
***********NOW AVAILABLE***********
http://www.pbnation.com/showthread.php?t=3407948


WEBSITE COMMING SOON...
ccluff2 is online now   Reply With Quote
Old 09-30-2010, 09:13 PM #20
samuelkeesee12
 
 
samuelkeesee12's Avatar
 
Join Date: Jan 2009
Location: Kentucky
Yeah. The paintball o-rings are rediculous. Whats the difference with the HNBR o-rings compaired to the polyurethane?
samuelkeesee12 is offline   Reply With Quote
Old 09-30-2010, 09:16 PM #21
KansasCityRellik
 
 
KansasCityRellik's Avatar
 
Join Date: Mar 2007
Location: 816 - KillaCity
" HNBR, aka. Therban: This material is chemically similar to Buna, except the materials are hydrogenized (addition of hydrogen). The resulting material tends to hold up longer than urethane or buna, while maintaining the same durometer as the lower-quality Buna rings. Although significantly more expensive, ideally this is the most long-lasting o-ring type available due to the long tolerances. "


**Quoted from ZDSPB.com**
__________________
-81SICCNESS-
Shocker NXT
KansasCityRellik is offline   Reply With Quote
Reply


Thread Tools

Posting Rules
Forum Jump