o-ring durometer / quality questions
Printed From: Tippmann Paintball
Category: Paintball Equipment
Forum Name: Gun Maintenace and Repair
Forum Description: Important info for keeping your marker in top shape
URL: http://www.tippmannsports.com/forum/wwf77a/forum_posts.asp?TID=142369
Printed Date: 10 January 2026 at 9:40am
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Topic: o-ring durometer / quality questions
Posted By: ebolacola
Subject: o-ring durometer / quality questions
Date Posted: 26 September 2005 at 6:03am
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So, I'm the new "techboy" for my student paintball group, and we have roughly 16-20 tippmann 98's that we use as rentals.. Therefore I need to get me some orings for the tippmann 98.. And after checking out the prices on OEM orings (those you get from tippmann themselves) I almost had a heartattack! I can get several hundreds of orings for the price of 1 or 2 of those kits.. I just need help to figure out what durometer and quality the different o-rings are.. How do I do that? I have a few of those kits already, so sizes is no problem, that I can measure. btw, I'm ordering from mcmaster.com so there is my reference  .ebo |
Replies:
Posted By: hybrid-sniper
Date Posted: 26 September 2005 at 7:24pm
| I really think they're all functionally the same... |
Posted By: Ken Majors
Date Posted: 26 September 2005 at 7:40pm
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Most paintball orings average in the 70-80 durometer range.
The Buna-N or nitrile (black rubber) orings are softer. They seal better over imperfections than does the urethane or harder (higher durometer) orings. But the black orings tend to be less forgiving. Meaning that they freeze when you unscrew your bottle of CO2 and then will never seal properly again. The white urethane orings or clear urethane tend to last longer and are generally easier to maintain. Urethane for the bottle, Buna-N for everything else...in a tippmann...that is a generalization but it usually holds true. ------------- RLTW |
Posted By: ebolacola
Date Posted: 27 September 2005 at 3:50am
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okay.. thanks for the help.. I figure that rule of thumb isnt a bad one.. and at the price I could get o-rings from mcmaster, compared to the kit from tippmann, changing them a couple of times more often is no trouble.. But if you look at this picture, there are 3 buna-N orings (top left, center, and the bottom tiny one), and 3 urethane orings.. But the bottom right is some other material.. Isnt that the so-called "bumper"-o-ring?  |
Posted By: Bango
Date Posted: 29 September 2005 at 12:05am
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The bottom right one is the one that goes around the drive spring behind the rear bolt.
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Posted By: Ken Majors
Date Posted: 29 September 2005 at 8:31am
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The bumper Oring can be Buna-N....or anything else for that matter.
It just keeps the rear bolt from slamming the rear cap and making that classic tippman "clang". Doesn't matter what the oring is made of cause it doesn't seal anything...it just works as a buffer. ------------- RLTW |
Posted By: fogman46
Date Posted: 15 October 2005 at 3:33am
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ok so ive got a pro/carbine that i took apart to clean and lube but when i took the reducer fitting off for the valve the o-ring shredded(that really small one)...so can i just put an o-ring from a normal kit in there or do i have to buy a special tippmann o-ring thanks guys |