O-ring Information
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There seems to be an amount of confusion surrounding o-ring sizing and selection. This page has lots of information, especially useful in cases of buying your own seals locally or from the internet.
Most non-mectric "SAE" o-rings are listed in a two-number form divided by a slash (example, 12/70, 17/70, 12/90, 15/90, etc.). This is considered the AS568A standard, or simply AS for short, which is the most common method of classifying o-rings in the United States. The first number is the size of the o-ring, the second number is the durometer or "hardness" (explained later).
O-ring Size:
The first number in the AS standard designation is the o-ring size. This number corresponds to a set of pre-defined sizes listed below. All AS standard o-ring sizes that have only two digits have a "height" of 1/16 inch, meaning the o-ring will be 1/16" high if you lay it down on the table. Other AS standard sizes are thicker but these are uncommon within the paintball industry. The o-rings being symmetrical means their heights and widths will be the same, as measured through a cross-section seen below.
The diameter of the o-ring is listed as follows:
Size:
Inside
diameter:
Outside
diameter:
The fact that the width/height of each o-ring is 1/16" means the OD is always 1/8" larger than the ID (1/16" on each side, making 1/8" total).
I suppose I should also mention that there are such a thing as 2/70 and 1/70, however these o-rings aren't used very often (if at all) in paintball. Also, they're not standard 1/16" height.
If you have an unknown o-ring and need to know its size, you can measure it using calipers or just by placing it on a rule (as shown below). This is easier with small o-rings since they tend to remain circular and not become oval-shaped, making them more difficult to measure by hand.
The o-ring in this picture has an outside diameter of 1/2 inch, so it must be a size 12 (unless it's metric)
Metric Sizes:
If an o-ring isn't measured in the SAE decimal system, chances are it's metric. Metric rings are measured in millimeters, generally by the inside diameter. Meaning, if you see an o-ring listed as 1x4-mm or 4x1-mm, it's likelt to have a height of 1-mm and an ID of 4-mm. However, if there is no "inside diameter" or "outside diameter" clarification after the size, you should verify the dimensions before purchasing your own. Personally I always label my metric sets with an "ID" tag to denote inside diameter, but others may miss this notation.
Large AS-standard Sizes:
Only o-rings with one or two digits are 1/16" height. O-ring sizes in the one-hundreds (110/70, 123/70, etc) have a larger height; these size differences range between size 100-999. These larger o-ring sizes aren't used much in paintball so I don't talk much about them on this page. I'm sure you can look them up on other websites if you need the information.
O-ring Durometer:
The second number in the AS term describes the "hardness" of the o-ring, which is officially known as the durometer. Durometer is the term used to descirbe the stiffness and density of just about any polymer material, from pencil erasers to chewing gum to the plastic in Tupperware. There are different classifications (called shores) of durometer but that's not important to this situation so I won't go into it.
Put simply, higher durometer o-rings are more stiff than smaller durometer ones. The so-called "default" o-ring durometer is 70, which allows for the best seal is most situations. However, there are some cases where a more stiff o-ring will be required, due to the design of the part using it, or the function of the o-ring. For instance, some clearance issues caused by a 70 durometer o-ring just barely not sealing can sometimes be cured by using a 90. Oftentimes the stiffer o-ring will help reduce leaks of this type becuase it doesn't adhere to the surface as loosley as the 70 duro ring does. However, in that sitution the 90 ring will tend to wear out more quickly because it won't be as compliant with nearby components.
O-ring Material:
Many manterials are used in the paintball industry and others. Here's a short list of some of them and a few brief details.
· Buna, Buna-T, NBR, Nitrile: These are different names for the same type of o-ring material (Butadiene Nitrile). These are the mose inexpensive o-rings and tend to be black in color. Most metric o-rings are only available in Buna. Additionally, most specialty o-rings used in solenoids and other applications are also Buna. Standard AS Buna o-rings cost only a few cents each, whereas mectric ones cost a little more.
· Urethane: This material is more common in "moving seal" applications because it provides a theoretically better seal compared to cheaper Buna o-rings. This means they tend to last longer in some situations. Urethane o-rings appear in various clear tints, depending on the manufacturer and method. Most of the time they will appear as a clear white color, but sometimes will carry a reddish or greenish tint (or any shade in between, brown, orange, etc). Further, 90 durometer urethane rings are often solid white instead of being clear colored. Available in many durometers. Urethane o-rings cost between 40-70 cents each.
· Viton: This is a greyish or blownish material that is often used in paintball regulators as 75 durometer o-rings. Viton offers better compression so it's sometimes used as a bumper material, or used in regulator systems as a shock-absorbant pressure seal. These cost between 10 and 20 cents each, depending on the size.
· HNBR, aka. Therban: The green o-rings that show up in some equipment are made from this material. It's chemically similar to Buna, except the materials are hydrogenized (addition of hydrogen). The resulting rubber material tends to hold up longer than urethane or buna, while maintaining the same durometer as the cheaper-quality Buna rings. Although significantly more expensive, ideally this is the most long-lasting o-ring type available due to the long tolerances.
· Other matierals include silicon, neoprene, Polyurethane, Ethylene Propylene, Acrylic Polyacrylate, Perfluoroelastomer, and others. These aren't typically used in paintball since they offer advantages in situations not often encountered in paintball equipment (chemical resistance, etc).
Despite the cost differences between o-rings, there really isn't such thing as a standard lifespan of a seal. It will vary depending on the frequency of use, surface finish of surrounding parts, weather conditions, lubrication, amount of particulates in the air source, and others. Additionally, not all o-rings are created equal. Nothing is truely "guaranteed" when it comes to an o-ring lifespan; more expensive urethane o-rings are more likely to outlast buna seals, but it isn't a guarantee that you won't need to rebuild a pressure system using more expensive o-rings. Sometimes things just break and you end up rebuilding the parts regardless; you can never be sure ahead of time.
Quad-Rings:
Quad-rings are special o-rings made in an "x" cross-section shape to facilitate a double-sealing surface, manufacturered in Buna by Minnesota Rubber manufacturing.
Theoretically these seals are less likely to laterially twist and bend using the moving surfaces slide against one-another. This is a characteristic known as spiral failure which can lead to shortened lifetime in other applications, such as hydraulics and other industrial components. In paintball, quad-rings have much less use, and in fact can cause certain components to leak if not designed correctly.
Examples of markers were quad-rings are appropriate include Matrix DM3 bolts or model AKALMP markers (Viking or Excalibur), but I don't know of any other cases where markers were specifically designed for use with quad-rings. They can sometimes be used in other markers as the moving seal, but often there isn't any practical benefit.
Other customized o-ring shapes are also available should you require them in bulk. They require special molds per application so the upfront cost is high.
O-ring diagrams:
For reference, here are diagrams of o-rings used in all Smart Parts markers and accessories. And a Matrix bolt at the end.
Ion stock firing assembly
Ion firing assembly with Firebolt
Ion firing assembly with Nano bolt
Ion misc o-rings
360º QEV
Shocker SFT misc o-rings
Shocker SFT stock bolt, older versions
Shocker SFT stock bolt, current version
Shocker SFT Turbocharger bolt, older versions
Shocker SFT Turbocharger bolt, current version
Shocker SFT NoX NV bolt, v1.0
Shocker SFT NoX NV bolt, v1.5
Shocker SFT Evolve v1 bolt
Shocker SFT Evolve v2 bolt
Shocker SFT NDZ v2 bolt
Shocker SFT NDZ v3 bolt
Shocker SFT Freeflow bolts
Nerve firing assembly
Nerve LPR with extender components
Nerve misc o-rings
Impulse firing assembly
Impulse misc o-rings
Shocker Sport firing assembly
DM3 stock bolt
Evolve DM3 bolt
Matrix Fuse bolts - DM4, DM5, DMC, PM5, PM6, PM7
Matrix Fuse bolts - DM6, DM7
Matrix Fuse bolts - DM8, PM8
Luxe bolt
Invert/Empire Mini firing assembly
Empire Axe firing assembly
Ion vertical regulator
Max-Flo Preset system
Max-Flo manifold system
Max-Flo MF-I system
Impulse vertical Max-Flo
Shocker/Nerve vertical Max-Flo disassembled
Shocker/Nerve vertical Max-Flo assembled
Dovetail/Inline Smartvalve
Mini-FLo LPR
Custom Products vertical regulator
Silicone O-ring is an ideal seal material for outdoor applications with excellent resistance to high temperature, high pressure, and other harsh elements. Compared to other elastomer materials, silicone has better weathering and insulating properties.
o ringsThe summaries will help you determine which company is the right fit for your requirements.
PositionCompany NameYear EstablishedLocation (City)Employ size1Hongju SiliconeDongguan50-SavvyNingboKN Rubber Tieling50-100 4Hongjie Sealing Shenzhen Seal SmartShanghai 10-50 6Xiaori LiuzhouBBS Limited Shenzhen QL Rubber Haining100-150 9DZR Seal Factory Taizhou100-200 10Ruichen Sealing Dongguan200Hongju Silicone is an industry leader when it comes to silicone rubber products. The company has over two decades of experience and established an impressive clientele worldwide with quality service. They use certified O-ring material and are well-equipped to manufacture custom O-rings to meet your requirements.
Hongju Silicone manufactures O-rings for multiple industries suitable to be used with both static and dynamic applications. They have versatile stock for standard o rings and can also provide you with free samples for testing.
The company is committed to producing eco-friendly and durable products that give optimal performance for the intended application. Hence, it is an ideal place to get a wide range of O-rings and sealing products.
Products and Services
Advantages
Quality Meets Affordability. Inquire Now for High-Quality Products at Low Volumes.
Inquire Today
Savvy is one of the top manufacturers of O-rings, oil seals, and custom rubber components in China. The company offers a wide selection of common and specialty materials for production. They can manufacture in all three O-ring sizes: inner diameter, outside diameter, and cross-sectional diameter.
Savvy&#;s product catalog includes diverse O-ring types that can be used with various static and dynamic applications. Most importantly, all the products meet FDA, RoHS, and Reach standards. Thus, you can trust them with closed eyes.
The company also offers after-sales service to assist customers with their problems and ensure a pleasing experience.
Products and Services
Advantages
KN Rubber is a leading O-ring manufacturer and supplier of rubber and plastic products in China. They have highly skilled workers and strictly implement best practices to produce international standard products.
The company has strong R&D capabilities and a rigorous quality testing system that ensures products meet clients&#; requirements. They provide an extensive range of products with specialized formulas to meet oil, temperature, chemical, and acid resistance needs.
KN Rubber prioritizes its customers and strives to provide them with tailored solutions for their needs.
Products and Services
If you want to learn more, please visit our website Wholesale O Ring Quotes.
Advantages
Hongjie Sealing Technology is another reputable designer and manufacturer of rubber components. They use various methods for production, including die cutting, injection molding, compression molding, etc.
The state-of-the-art factory covers an area of 11,000 sq. meters. It has all the modern machinery to produce a wide selection of industrial rubber products. The company is committed to fulfilling customers&#; needs by offering satisfactory service and quality products at a reasonable price.
They manufacture O-rings with excellent chemical compatibility and a high-temperature range for longer service life.
Products and Services
Advantages
SealsSmart, with 15 years of manufacturing experience, is another credible company that can provide you with high-quality O-rings. They have all the advanced production and testing equipment for producing the highest standard products.
Surprisingly, SealsSmart provides around 1,000 specifications of O-rings. Whether you need mil-spec or non-standard O-rings, the company has everything for you. Since the products have passed FDA and SGS tests, you can trust them with closed eyes.
Products and Services
Advantages
Xiaori was formed to promote quality manufacturing, production agility, and excellence. The company has been in business since and has established a credible market for its product in various countries and regions.
They have comprehensive knowledge of different rubber and silicone materials. With modern workshops and skilled professionals, they can easily produce products to meet the specific demands of each country.
From special packaging to other comprehensive range of solutions, Xiaori is the perfect company for your O-ring and sealing needs.
Products and Services
Advantages
BBS is a high-tech supplier and manufacturer of rubber silicone and plastic products in China. They have diverse capabilities and are well-equipped to offer both OEM & ODM services. With more than 20 years in the industry, the company has significantly improved since its establishment.
From product design and prototyping to customization services, BBS is determined to provide its customers with the best experience. The company primarily serves businesses in Europe and the US. So if you belong to any of these regions, BBS is your best bet for getting the highest quality O-rings.
Products and Services
Advantages
Qianlang is a leading manufacturer of rubber products in China with over two decades of experience. The company produces products with all kinds of materials to cater to customers&#; specific demands. From standard products to custom parts, they provide curated solutions to all.
Qianlang has an extensive product catalog, and with advanced equipment, you can expect a quick turnaround. All the products meet international standards and can withstand the most extreme environments. Overall, it is a great place to get high-quality products cheaply.
Products and Services
Advantages
As the name suggests, DZR Seal Factory specializes in manufacturing all kinds of seals. They have 20+ years of experience in the industry and are a reliable company for getting premium quality products.
They use a wide range of raw materials for production, allowing them to cater to clients&#; specialized requirements. The products are backed by a strong technical force and a quality management system, which suggest they meet international standards.
Most importantly, they have acquired certifications like FDA, PAHS, REACH, and RoHS for their products. DZR Seal Factory is committed to helping customers with all their needs and providing them with cost-effective solutions.
Products and Services
Advantages
Ruichen Sealing is a credible and reputable manufacturer and supplier of O-rings in China. They assist customers with mold development, shortening the development cycle and reducing failure chances.
The company&#;s skilled and professional workforce ensures clients receive only the best-quality O-rings. They can manufacture O-rings in both standard and metric sizes. Ruichen uses only quality raw materials for O-rings to prevent leakage pressure and critical torque under high pressure.
The company also offers after-sales services to help customers with their queries. Whatever your requirements are, contact Ruichen for the best experience.
Products and Services
Advantages
China has a competitive market for every industry, so it has become a world trading hub. If you are considering importing from China, here are some reasons you are doing the right thing.
The production cost of any product reduces significantly when imported from China. Most Chinese manufacturers make raw materials in their factories and have huge stocks. In addition, the labor is also much cheaper than in European countries, and each factory employs hundreds of skilled individuals. This means that you get the highest quality products at a reasonable price.
Another major advantage of importing from China is the diverse customization capabilities of Chinese companies. Our list of manufacturers can produce custom O-rings to meet your requirements. They have a wide selection of O-ring materials and know all O-ring sizes. Whatever your requirements are, they will produce products with the exact specifications.
High profitability is a primary factor that attracts businesses worldwide to import from China. The affordable production, labor, and reduced fees on duties increase your profit margin. If you purchase O-rings in bulk from Chinese manufacturers, you can sell them at a 5x price or even more. With better profitability, the chances of your business growth also improve.
Hongju Silicone is an ideal company for you if you need quality O-rings. In addition to silicone, we offer a great variety of O-ring materials and can meet your specific demands. Whatever size, shape, and style of O-rings you need, we are the company to get optimal solutions.
Quality Meets Affordability. Inquire Now for High-Quality Products at Low Volumes.
Inquire Today
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