Stribeck Curve Calculator

Stribeck Curve Equation

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

λ = Film thickness raio (dimensionless)

h = Lubricant film thickness (m)

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

Calculator

Property to Calculate:

Film thickness raio (λ):

Lubricant film thickness (h):

Composite surface roughness (σ):

Equation Assumptions

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