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Knowledge Center
Practical engineering guides on squeeze, gland fill, stretch, extrusion, material choice and failure analysis.
Latest guides
Guide
What is O-ring squeeze?
How compression creates and maintains a seal, and how to calculate it.
Read guide GuideWhat is gland fill?
Why a groove must never be completely filled, and how to check it.
Read guide GuideO-ring extrusion failure
How pressure pushes an O-ring into the clearance gap, and how to prevent it.
Read guide GuideStatic seal vs dynamic seal
Why relative motion changes almost every design limit.
Read guideMore topics in preparation
Coming soon
How to calculate O-ring groove dimensions
Turning cord size and target squeeze into a groove.
Coming soon
O-ring stretch limits
How much inner-diameter stretch is safe.
Coming soon
FKM vs NBR
Choosing between fluoroelastomer and nitrile.
Coming soon
FKM vs FFKM
When perfluoroelastomer is worth it.
Coming soon
EPDM chemical compatibility
Where EPDM excels and where it fails.
Coming soon
How to select O-ring hardness
Balancing squeeze, extrusion and friction.
Coming soon
O-ring surface finish requirements
Groove and bore finish for reliable sealing.
Coming soon
O-ring compression set
Why seals lose recovery over time.