An oring can perform sealing by means of squeeze under low pressure conditions. The extent of extrusion depends upon the hardness of oring. Global oring and seal, llc is a master distributor of o rings, backup rings, x rings, cord stock, and related seals, servicing industrial distributors worldwide. There are 369 standard sizes of o rings with inside diameters ranging from 0. O rings sizes for viton o rings, fluorosilicone o rings, silicone o rings, buna nitrile o rings, and all parker o ring sizes, and cross to the as568 aerospace o rings. An oring is a circular crosssection ring molded from rubber figure 11. An oring is contained in a gland and forced to flow into the surface imperfections of the glands and any clearance gaps available to it. O ring seals are best in dynamic applications when used on short stroke, relatively small diameter applications.
Popular oring size standards include usas as568 oring size chart, the uks bs 1806 oring sizing chart, and japans jis b 2401 oring size list. Oring size chart the oring store llc, we make getting o. Learn how to measure orings the right way oring size chart. This o rings size chart from parker will help you find the o ring size you need. Order orings online from the worlds largest inventory network including custom orings typically without tooling fees. As568 dimensions as568 is the aerospace size standard for o rings from the society of automotive engineers. Raise the weight to the top of the tube as far as it will. Oring size charts metric orings standard size orings.
O rings are used in a variety of applications in different industries around the world. Refer to our standard oring size chart to find usa as568 oring dimensions. Oring dimensions for metric thread with conical recess according to iso 6149. If the o ring, quad ring, x ring or square ring you need doesnt fit these standards, custom. Parker oring handbook goes digital oring ehandbook. Then choose a compound from the chemical compatibility table and call for your order. How to determine oring size for sequence in ordering. The eriks o ring manual is a guide which assists you in the selection of the best o ring out of the correct rubber compound in the right application. The proper o ring size is a fundamental aspect of proper o ring performance.
O ring handbook parker hannifin o ring division europe. Parker oring handbook 5700 handbook introduction 11 seals build with the best. Until now, oring standards have left a gap between the 18 and 316 nominal cross sections. O ring 5 dowty o rings dowty o rings was set up in 1961 to produce high volumes of elastomeric o rings.
Download the oring size chart to view standard sizes o rings are measured in millimeters. The extent of extrusion depends upon the hardness of oring, the pressure, and the size of the clearance gap. Eriks technical manual oring gland design information. Orings free of substances affecting the lacquer coating labsfree. Long stroke, large diameter seals are more susceptible to spiral failure. Custom sizes of almost any dimension are possible such as miniature o rings and special o rings with large dimensions. How to determine o ring size for sequence in ordering. O rings o rings are manufactured according to metric and imperial international standards such as as568b, din iso 3601 and jis. Oring sizes metric and standard chart sizes of orings. Orings and backup rings trelleborg sealing solutions. Guide for the choice of an o ring for static parts although in principle any cross section is suitable, it is advisable to take o rings. With 40 years of experience in producing premium quality elastomeric o rings, dowty o rings produces and sells over one billion o rings. Port dimensions fitting dimensions sae o ring port dimensions e c d f b t a c d go 45o fluid power data sae o ring port dimensions. International oring standard cross reference 2 shortly after o rings first came into common use, it became obvious that standards for o ring sizes, tolerances, and groove design would be beneficial.
Ms28775 oring chart sizing imperial sizes part no marked in red are stock lines email. These groove dimensions are for compounds that free swell less than 15%. The original formats of the printed catalog and searchable pdf will still remain available via parkers catalog services and the o ring division website. Both are interlinked, thus ensuring the best possible combination of the calculated o ring size and material choice. O ring size as568b w cross section l squeeze g groove width r nominal actual gland depth actual % liquids vac um and gases groove radius industrial static radial glands pdf o ring. The seal assembly consists of an elastomer oring and a gland. Current cleaning processes ensure that the part is free of any contaminants. View parcos o ring size chart for detailed dimensions. An oring is never defined by its outer diameter but by its inner diameter d1. All books are in clear copy here, and all files are secure so dont worry about it. As568 dash number appears to the right of o ring inside diameter i. Parco orings are available in a wide range of standard and nonstandard sizes that are suitable for nearly all sealing applications.
O ring guide introduction the o ring, or toroidal seal, is an exceptionally versatile sealing device. O ring kits the handy carrying case with o rings is ideally suited. The height of the first bounce will indicate one of the four calibrated ranges. Parco offers generalpurpose and highperformance o rings. As568 standard oring size chart 23 las colinas lane suite 108 san jose, ca 95119 tel. The o ring ehandbook is expected to bridge the generation gap, filling the need for all learning and reference styles. Applications, ranging from garden hose couplings to aerospace or oil and gas duties, make it the worlds most popular volumeproduced seal. Simrit manufactures and supplies the complete range of standard as568 sizes in a wide range of elastomeric o ring. Groove width b is determined by the oring cross section d2 and the elliptical shape after compression plus a free space in which the medium can enter to. Please contact us if you are looking for a size not shown in the 532 group. Parker hannifin corporation o ring division 2360 palumbo drive, lexington, ky 40509 phone.
Dimension x should be greater than dimension y to ensure a troublefree assembly operation. An o ring is one of the most common types of seals in the world. Application of o rings in rotary motions in a rotating application a shaft continuously rotates in the inside diameter of the o ring. Usa as568 oring standard sizes are the most commonly used oring sizes in the world. Download metric oring sizes and standard sizes chart pdf oring standard size as 568a, bs 4518, gbt 3452. Since then various government and engineering organizations have produced a multitude of o ring. Place the oring on a stable surface and position the material tester over the oring. O ring kits the handy carrying case with o rings is ideally suited for.
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