Herringbone thrust bearing (design)

Operating speed, friction torque and power loss for a herringbone-profile spiral-groove thrust bearing carrying a given load.

✓ validated against legacyoriginal: /calculators/e9_5.htm

Load, FNDiameter, DmmFilm thickness, h₀µmGroove depth + film, h₁µmDynamic viscosity, ηPa·sGroove radius ratio, λGroove angle, α°Number of grooves, k

Speed, n46.45932622939931 rpm

Angular speed, ω4.865209265767081 rad/s

Friction torque, T0.0002331720100314655 N·m

Friction power, P0.001134430623722621 W

Friction coefficient, µ0.0033310287147352217

Design coefficients

Film ratio, δ = h₀/h₁0.125

H0.1111111111111111

g₁0.03789870800822717

g₂0.677737602763229

C₁0.9231220519165558

Load coefficient, F̄0.04280320795180874

µ₁23.317201003146554

Scarce-core calculator. Viscosity is entered in Pa·s (not µPa·s as in the air-bearing variant).

Method & references

Narrow-groove (Muijderman) theory, herringbone groove profile.
Default values are for an oil-lubricated bearing (η = 0.02 Pa·s).

The computation is a literal port of the original client-side JavaScript from /calculators/e9_5.htm. Results are verified equal to the original by an automated golden-master test. No formula has been re-derived or “improved”.