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Stribeck Regime Check

Position on the Stribeck curve from the Hersey parameter η·N/P - boundary, mixed, or full-film.

Lubrication
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Formula, assumptions, and limits

Hersey=ηNP\text{Hersey} = \frac{\eta N}{P}
SymbolMeaningUnit
ηηDynamic viscosityPa·s
NNShaft speedrev/s
PPSpecific bearing loadPa

Source: Stribeck (1902)

In short

Position on the Stribeck curve from the Hersey parameter \u03b7\u00b7N/P - boundary, mixed, or full-film.

Learn the theory Cylinder Lubrication Systems: Two-Stroke Engines