An O-ring, also known as a packing, or a toric joint, is a mechanical gasket in the shape of a torus; it is a loop of elastomer with a round cross-section, designed to be seated in a groove and compressed during assembly between two or more parts, creating a seal at the interface.
The O-ring may be used in static applications or in dynamic applications where there is relative motion between the parts and the O-ring. Dynamic examples include rotating pump shafts and hydraulic cylinder pistons. Besides, they are inexpensive, easy to make and reliable and have simple mounting requirements. O-rings can seal tens of megapascals (thousands of psi) of pressure.
About O-Ring Specification
O-rings come in a variety of sizes British Standard (BS) which are imperial sizes or metric sizes. Typical dimensions of an O-ring are internal dimension (id), outer dimension (od) and thickness / cross section (cs)
Metric O-rings are usually defined by the internal dimension x the cross section. Typical part number for a metric O-ring – ID x CS [material & shore hardness] 2x1N70 = defines this O-ring as 2mm id with 1mm cross section made from Nitrile rubber which is 70Sh
※BS O-rings are defined by a standard reference.
O-Rings are one of the most popular and common seals used in machine design for their reliability and low cost. JENP existing toolings include all O-Rings in accordance with AS568A. We also supply metric sizes.
If you need detailed O-Ring specification, welcome to visit JENP’s website where specification can be downloaded. Any questions are also welcomed to contact us, JENP will reply to you as soon as possible!
Article Source: https://en.wikipedia.org/wiki/O-ring
