Oring Gland Design: tolerances
O-ring gland design dimensions and squeeze parameters per AS568B-2016 (SAE standard) and Parker O-Ring Handbook ORD 5700 (2018). Covers five cross-section size groups (0.070, 0.103, 0.139, 0.210, 0.275 inch) for static radial seals, dynamic reciprocating seals, and face (axial) seals. Includes gland depth, groove width (inches and mm), squeeze percentage ranges, groove surface finish requirements, backup ring pressure thresholds, representative AS568 O-ring dimensions by dash number, dimensional tolerances, and elastomer material compatibility temperature ranges (NBR, FKM, EPDM, silicone, CR).
| seal application | record id | cs in (in) | cs mm (mm) | description | notes |
|---|---|---|---|---|---|
| tolerances | cs_tol_070 | 0.07 | 1.78 | AS568 CS Tolerance for 0.070 in Cross-Section | CS tolerance: +/-0.003 in (+/-0.08 mm); ID tolerance: +/-0.005 in (+/-0.13 mm) for -004 to -028; +/-0.010 in for -029 to -050 (2% or 0.010 in whichever is greater); per AS568B-2016 |
| tolerances | cs_tol_103 | 0.103 | 2.62 | AS568 CS Tolerance for 0.103 in Cross-Section | CS tolerance: +/-0.003 in (+/-0.08 mm); ID tolerance: +/-0.005 in (+/-0.13 mm) for -102 to -120; +/-0.010 in for -121 to -178 (1% of ID or 0.010 in whichever is greater) |
| tolerances | cs_tol_139 | 0.139 | 3.53 | AS568 CS Tolerance for 0.139 in Cross-Section | CS tolerance: +/-0.004 in (+/-0.10 mm); ID tolerance: +/-0.007 in (+/-0.18 mm) for -201 to -214; +/-0.014 in for -215 to -244 (1% of ID) |
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