Position on the Stribeck curve from the Hersey parameter η·N/P - boundary, mixed, or full-film.
Formula
$$ \text{Hersey} = \frac{\eta N}{P} $$
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| $η$ | Dynamic viscosity | Pa·s | oil property |
| $N$ | Shaft speed | rev/s | tachometer |
| $P$ | Specific bearing load | Pa | load/area |
Sources
- Stribeck (1902).