WebSAE International’s AS568 Standard Class A Specification establishes the inside diameters, cross-sections, tolerances, and size identification codes (dash numbers) for O-Rings used in sealing applications and for straight thread tube fitting boss gaskets. O-rings for static (non-moving) sealing can be used in a wide variety of applications and arrangements. The most common arrangement in hydraulic cylinder applications is static radial sealing between coaxial cylindrical parts. The O-ring is installed in a housing that is machined either as an outside groove (fig. 1) or an … See more All housing groove edges should be smoothed and rounded off (fig. 1, fig. 2) to r = 0,1 to 0,2 mm (0.004 to 0,008 in.). See more The size of the permissible extrusion gap (→ Gap extrusion) depends mainly on the seal material, temperature and operating pressure. Harder materials (→ Materials) provide a certain … See more All edges and openings through which the O-ring has to pass during the assembly should have appropriate lead-in chamfers and should be well rounded off (table 1). The chamfers facilitate assembly and protect the O-ring … See more To accommodate the additional back-up rings, the O-ring groove width L needs to be increased to L1 for one back-up ring or L2 for two back-up rings (fig. 3). The groove width dimensions are listed in the size lists. See more
O-rings and back-up rings SKF
WebThe OD of the ring should be about the same as the recess diameter. The same sealing principle applies to crush type seals used in recesses of straight thread tubing bosses. … WebThis class of o-rings is primarily utilized in hydraulic tubing and fittings up to 3000 psi. A straight thread, not tapered, is used so that the o-ring seals under compression. Because … brian head atv
Design Tenneco
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