O-ring Information

[Krazy8]

Credit for the compilation of this information goes to Jinx18 from the PbN MacDev family...great work man




Oring Materials

Buna - Also known as Buna-N, Buna-T, NBR, Nitrile. They are all made of the same material, Butadiene Nitrile. These are the typical orings that come on almost every paintball gun. They are the cheapest, the most common and come in black color. The Durometer hardness is A70. If you are unsure what material to buy this is the default material to go to.

Urethane - Orings of this material are traditionally higher quality than Buna. They come in many different durometers. They are usually a clearish color. Harder durometers like a A90 durometer urethane orings are often solid white instead of being clear colored.

Viton® fluoroelastomer - These are slightly harder and slightly more durable orings from the Buna. Durometer hardness is typically A75. They are usually black but can be a greyish or brownish color.

HNBR - Also known as High-Temperature Buna-N (Hydrogenated Nitrile Butadiene Rubber). These are the green orings you see. They are similar to Buna, except the material is hydrogenized (saturated with hydrogen to improve resistance to heat and ozone). They should hold up longer than urethane or buna, while maintaining the same durometer as the Buna rings.



Oring Shapes

Round - Typical orings you are used to seeing on paintball guns. Cross section is round in shape.



X ring- Also known as Quad ring, Quattro Seal, Double Seal. These are special o-rings made in an "x" cross section shape for a double sealing surface. The idea is that the quad ring won't be able to twist and bend when the part moves since they aren't circular. They also should allow for lighter seals since the surface of the quad-ring sealing against the part is smaller. This should allow for less pressure required to move the part though this may be extremely negligible in paintball gun.

There are only certain places you would want to install an x ring. You would want to replace any oring that has movement over it, either when the oring is stationary but something slides over it or when the oring is on something that slides. You also want to make sure that the x ring has constant contact with a surface. You do not want an x ring in an area that goes into and out of contact with something as the x shape of the ring can get caught and pulled off. When using quad rings you must experiment with them. They may leak or cause other issues. They may or may not work in all applications. You will need to try and see if your results are positive.





Oring Sizes and Locations on Macdev Products

The charts below have the information as:

Location (Oring Size) - Oring Description - Part number from McMaster-Carr

Part numbers can be plugged into and bought from http://www.mcmaster.com



Macdev Clone VX Drivetrain

Bolt Keg Inner (017) - 70 Durometer Buna - 9452K71
Bolt Keg Outer (020) - 70 Durometer Buna - 9452K74
Bolt Tip (014) - 70 Durometer Buna - 9452K58
Bolt Bumper (15x1) - 70 Durometer Buna - 9262K444
Bolt Switch (016) - 70 Durometer Buna - 9452K6
Spacer Inner (017) - 70 Durometer Buna - 9452K71
Spacer Outer (017) - 70 Durometer Buna - 9452K71
Valve Front (17x1) - 70 Durometer Buna - 9262K615
Valve Middle (17x1) - 70 Durometer Buna - 9262K615 - 75 Durometer Viton - 9263K553
Valve Rear (15x1) - 70 Durometer Buna - 9262K444
Valve Keg Outer (020) - 70 Durometer Buna - 9452K74
Powertube Tip (011) - 70 Durometer Buna - 9452K19
Powertube Mid (10x1) - 70 Durometer Buna - 9262K104
Powertube Cap Inside (020) - 70 Durometer Buna - 9452K74
Powertube Cap Outside (020) - 70 Durometer Buna - 9452K74





Macdev Drone DX Drivetrain

Keg Inner (017) - 70 Durometer Buna - 9452K71
Keg Outer (020) - 70 Durometer Buna - 9452K74
Bolt Tip (014) - 70 Durometer Buna - 9452K58
Bolt Bumper (15x1) - 70 Durometer Buna - 9262K444
Bolt Switch (016) - 70 Durometer Buna - 9452K6
Valve (014) - 70 Durometer Buna - 9452K58





Macdev Gladiator Inline Regulator

Swivel (016) - 70 Durometer Buna - 9452K6
Adjuster (008) - 70 Durometer Buna - 9452K16
Seat (6x1) - 70 Durometer Buna - 9262K103
Retainer Inner (008) - 70 Durometer Buna - 9452K16
Retainer Outer (011) - 70 Durometer Buna - 9452K19
Swivel (016) - 70 Durometer Buna - 9452K6
Bottomworks (016) - 70 Durometer Buna - 9452K6
Piston (016) - 70 Durometer Buna - 9452K6
Topworks (015) - 70 Durometer Buna - 9452K59




Credit for the Tactical Drone rings goes to Boomer...
Tactical Drone

Size Qty Location (s)
005 3 ASA retainer, ASA bar (2)
008 2 inline retainer inner, adjuster
011 1 power tube tip
013 1 Powertube mid
014 2 bolt tip, ASA retainer
015 4 regulator top, swivel, inline cap, bolt bumper
016 1 reg piston
017 2 Keg inner, inline retainer outer
018 2 power tube rear, bottom works
019 1 keg switch
020 4 Keg outer (3), end cap
4x1mm 4 sub plate (4)
2x1mm 2 solenoid
17x1mm 1 Bolt mid-oring



Macdev Clone Drivetrain

Bolt Keg Inner (017) - 70 Durometer Buna - 9452K71
Bolt Keg Outer (020) - 70 Durometer Buna - 9452K74
Bolt Tip (014) - 70 Durometer Buna - 9452K58
Bolt Bumper (15x1) - 70 Durometer Buna - 9262K444
Bolt Switch (016) - 70 Durometer Buna - 9452K6
Spacer Inner (017) - 70 Durometer Buna - 9452K71
Spacer Outer (017) - 70 Durometer Buna - 9452K71
Valve Front (17x1) - 70 Durometer Buna - 9262K615
Valve Middle (17x1) - 70 Durometer Buna - 9262K615 - 75 Durometer Viton - 9263K553
Valve Rear (15x1) - 70 Durometer Buna - 9262K444
Valve Keg Outer (020) - 70 Durometer Buna - 9452K74
Powertube Tip (011) - 70 Durometer Buna - 9452K19
Powertube Mid (10x1) - 70 Durometer Buna - 9262K104
Powertube Rear (10x1) - 70 Durometer Buna - 9262K104
Powertube Cap (020) - 70 Durometer Buna - 9452K74





Macdev Droid Drivetrain

http://macdevog.com/BorgFocus/images/o-r...0chart.pdf

63 Keg Inner Oring
64 Drivetrain Outside Oring (x6)
65 Keg
66 Drivetrain Floating Oring (020) - 70 Durometer Buna - 9452K74
67 Bump Stop
68 Bolt
69 Bolt Front Oring (014) - 70 Durometer Buna - 9452K58
70 Bolt Switch oring (016) - 70 Durometer Buna - 9452K6
71 Joiner Inner Oring
72 Joiner
73 Valve
74 Valve Oring (x3)
75 Valve Keg
76 Valve Keg Rear Oring
77 Powertube Oring (x2) Front 2 (011) - 70 Durometer Buna - 9452K19
78 Powertube
79 Powertube Rear Oring (012) - 70 Durometer Buna - 9452K21
80 Powertube Cap





Macdev 2007 Cyborg

Bolt (x3) (013) - 70 Durometer Buna - 9452K57
Ram bumper/Hammer Bump Stop (007) - 90 Durometer Buna - 5308T116
Rear Ram Oring/Hammer Switch (011) - 70 Durometer Buna - 9452K19
Front Ram Oring/Hammer Front (110) - 70 Durometer Buna - 9452K22
Ram/Valve Body EXCEPT the front o-ring of Ram Body (x6) (015) - 70 Durometer Buna - 9452K59
Front o-ring of Ram Body (013) - 70 Durometer Buna - 9452K57



LPR Piston (x2) (012) - 70 Durometer Buna - 9452K21





Macdev RX Inline Regulator

Topworks (015) - 70 Durometer Buna - 9452K59
Piston (016) - 70 Durometer Buna - 9452K6
Retainer Inner (008) - 70 Durometer Buna - 9452K16
Retainer Outer (017) - 70 Durometer Buna - 9452K71
Seat Retainer (008) - 70 Durometer Buna - 9452K16
Bottomworks (018) - 70 Durometer Buna - 9452K72
Sleeve (x2) (016) - 70 Durometer Buna - 9452K6
End Cap (013) - 70 Durometer Buna - 9452K57
Adjuster Screw (008) - 70 Durometer Buna - 9452K16

[Boomer]

Here are the orings from the Clone GT. The drive and regulator sizes are taken from the manual, the others by disassembly and comparison. If I get to it, I will paste the manual diagram here with callouts to their locations. There are ALOT of orings in the subplate area, as expected with the air through.

Size location qty

drive assembly
017 keg inner (1)
020 bolt ket outer (4)
016 bolt switch (1)
15x1 bolt bumper (1)
017 spacer inner (1)
017 spacer outer (1)
017 valve orings (3)
020 valve keg outer (4)
011 power tube tip (1)
011 power tube mid (1)
020 power tube cap inner (1)
020 drive cap outer (1)

regulator
014 bottomworks (1)
008 adjuster (1)
6x1 reg seat (1)
012 retainer outer (1)
008 retainer inner (1)
012 piston (1)

frame and subplates
006 asa knob (1)
012 asa/frame (1)
2x1 solenoid (2)
4x1 solenoid (1)
4x1 subplate/frame (1)
2x1 subplate/body (1)
4x1 subplate/body (1)
17x1 subplate/body (1)
3x1 subplate-subplate (2)
4x1 front subplate (1)
8x1 front subplate (1)

[Fellouss]

Hi,

I live in French Guiana, south america, so it is more convenient for me to buy here than make an order.


Can you please explain to me the characteristics of some orings:

For examples:

the O-ring 17:
what is exact size? is that inches? what is the diameter of the "tore", what is the intern diameter of the O-ring?

The O-ring M17:
What does "M" means?what is the diameter of the "tore", what is the intern diameter of the O-ring?

The material is "Perbunan", is it like Buna-n? They don"t precise if it is Durometer 70.
So i can make my own O-ring kit here for my GT.

Thanks,

Fellouss

The ma

[benjamin87]

Wow great post.Really i think it is a admirable post. Thank's. Robin Rozario

[Robert1000]

Excellent post. Really I am surprised about this post. Thanks.

[Robinson]

Wonderful post. I think it is very informative post.

[Dford]

Hello,
I wanted to follow up on the question from Fellouss

The sizes pointed out by Krazy8 and Boomer are US industry standard oring measurements. They are referred to as an O-ring's "dash" number. So when you see numbers like (011, 017, 020, 110) those are referring to AS568-011, AS568-017, AS568-020, AS568-110 sizes. I work for a rubber manufacture and would like to provide some help with some quick size cross reference information.

Our store site has an online o-ring chart which list all AS568 o-rings in metric, inch and fractional dimensions. You can view this page here: http://www.rubberstore.com/catalog/as568...-chart.php

Or if you prefer you can download our corporate PDF files on our manufacturing site's as568 o-ring page here: http://www.columbiaerd.com/as568_orings.php (the pdf files are on the bottom left side of the page)

Very good post, and I hope the information on sizes helps your users.
Don