Oring Gland Design: stretch_limits
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 | description | notes |
|---|---|---|---|
| stretch_limits | max_stretch | Maximum O-Ring Stretch at Installation | Maximum recommended stretch: 5% for piston installation over piston OD; 2% for rod seal installation over rod OD; face seals: 0-3% stretch; excessive stretch reduces cross-section causing reduced squeeze |
| stretch_limits | min_stretch | Minimum O-Ring Diameter Engagement | Minimum O-ring inside diameter must be <= bore diameter for piston seal to stay in groove; recommended 0-3% compression fit; O-ring must not fall out of groove during assembly; for rod seals O-ring OD must be >= housing bore |
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