Face-Seal Groove Designer
h=d₀(1−squeeze); A_oring=π/4·d₀²; w=A_groove/h at target fill. Live cross-section with pass/fail bands (squeeze 15–30%, fill 75–85%).
Squeeze vs Temperature (CTE)
Elastomer shrinks faster than the housing on cooling — squeeze drops at cold, the classic IP-seal leak. Sweep −40 to +85 °C.
Squeeze / Fill / Stretch (measured)
From actual O-ring & groove dimensions.
Residual Squeeze after Compression Set
Long-term recovery loss reduces effective squeeze.
Ingress Depth & IP Rating
P=ρgh; IP67 = 1 m, IP68 = user depth.
Formula reference
Groove h=d₀(1−squeeze), A_oring=π/4·d₀², w=A_oring/(fill·h); fill =A_oring/(h·w); stretch =(ID_groove−ID_oring)/ID_oring.
Squeeze(T): d₀(T)=d₀(1+α_o·ΔT), h(T)=h(1+α_h·ΔT), squeeze=(d₀(T)−h(T))/d₀(T). Residual ≈ squeeze·(1−CS).
Hydrostatic P=ρgh (1 m water ≈ 9.81 kPa). Targets: squeeze 15–30%, fill 75–85%, stretch <5%.