Iso standard o rings

ISO was originally developed for general-purpose O-rings, but over the years this standard has been revised and refined to include three grades N, S, CS of defects depending upon the application. Grade S : Quality requirements for optimum performance industrial applications and aerospace applications. Grade CS : Special and critical sealing applications, such as certain aerospace applications and critical oxygen service applications. Examples of surface imperfections characterized by this standard include flash, offset, parting-line projection, back rind, excessive trimming, flow marks, non-fills, and indentations.

The first digit of the Size Code indicates the cross section group A-E , while the last four digits indicate the O-Ring inside diameter rounded to one-tenth millimeter. ISO Quality Acceptance Criteria ISO was originally developed for general-purpose O-rings, but over the years this standard has been revised and refined to include three grades N, S, CS of defects depending upon the application. Apple Rubber offers a direct approach to purchasing o-rings from one of the largest inventories in the sealing industry.

If we don't have it, we can make it. In-house tooling and manufacturing allow us to expedite tooling and delivery. O-Rings are typically called out by the inner diameter of the torus and the diameter of the round cross-section. Thus, for an AS size 70 shore A, Nitrile would be: 0. For standard sizes, aerospace standard AS and ISO for metric sizes are used to give the dimension and tolerance.

These are the sizes that are most readily available. Since new designs should also try to incorporate these sizes, we offer groove design tools for static and dynamic applications. Still have questions about finding a standard or non-standard size? Contact us with your questions or use our online size search and free O-Ring Gland Calculator. You can also submit an Engineer Request to work directly with our Design Engineers with over 30 years of design experience. When you are ready to get started, submit an online RFQ to receive a quote from our dedicated sales team within 24 hours.