Work out bearing load rating instantly with clear inputs, formula shown and shareable results.
A bearing catalogue quotes life against a single equivalent load, so combined radial and axial loading must be reduced to P = X Fr + Y Fa using factors from the bearing type and the axial-to-radial ratio. When the axial component is small the plain radial load governs, which is why the larger of the two values is taken.
Equivalent dynamic load
P = max(Fr, X x Fr + Y x Fa)
Preliminary estimate only. Confirm load factors, limiting speed and lubrication against the bearing manufacturer's catalogue.
P = max(Fr, X x Fr + Y x Fa). A bearing catalogue quotes life against a single equivalent load, so combined radial and axial loading must be reduced to P = X Fr + Y Fa using factors from the bearing type and the axial-to-radial ratio.
From the manufacturer's tables for the bearing series, indexed by the axial-to-radial ratio against a limiting value e. A deep groove ball bearing commonly uses X = 0.56 with Y between 1.0 and 2.3.
This calculator takes 4 inputs: Radial load, Axial load, Radial factor X, Axial factor Y. The pre-filled defaults are a realistic worked example — replace them with your own site or project figures.