Stribeck Curve Calculator

Film thickness raio (λ):

Lubricant film thickness (h):

Composite surface roughness (σ):

How This Is Calculated

$$ \lambda = \frac{h}{\sigma} $$ where:

λ = Film thickness raio (dimensionless)

h = Lubricant film thickness (m)

σ = Composite surface roughness (combined roughness of the two surfaces) (m)

Assumptions

Load and speed remain constant.
There are negligible surface deformations.
The system exhibits isothermal conditions.
The lubricant is newtonian.
Surface geometry is ideal.