sci.stribeck-lubrication Calculator
Calculates the Stribeck curve parameter Gn = ηN/P (viscosity × speed / load) and identifies lubrication regime: boundary, mixed, or hydrodynamic. At low Gn (high load, low speed), asperity contact dominates (boundary lubrication) — at high Gn, full-film EHD lubrication separates surfaces completely.
Inputs
- Mu Pas
- Fluid resistance to flow. Water at 20°C: ~1 cP. Honey: 2,000–10,000 cP. Higher viscosity increases pumping power requirements.
- Speed M S
- Rate of movement. 1 m/s = 3.6 km/h = 2.237 mph.
- Load N M
- Horizontal extent perpendicular to the length.
Results
- Stribeck number ηU/W
- Sample size or count used in the calculation.
- lubrication regime
- The operating regime — the mode or zone in which the system is currently operating.
- estimated CoF
- The value at the specified point or condition.
- dynamic viscosity η (Pa·s)
- Sample size or count used in the calculation.
- Stribeck curve regions
- Sample size or count used in the calculation.
- Stribeck 1902 curve
- Reference formula or conversion factor shown for context.
regime sliding stribeck viscosity number