OID / ENGINEERING TOOLS
Operating internal clearance
Track how fits and temperature change the bearing's initial clearance.
The specific bearing's data is entered manually.
REFERENCE MATERIAL
How to determine the inputs
Open the explanation, pick the applicable table, or step through the worked example.
Methodology and limits of applicability
Model of the initial, residual and operating radial clearance
Δoper = Δinit − δi − δe − Δtherm
Δtherm = α · ΔT · Dpw · 1000, µm
Δtherm = α · ΔT · Dpw · 1000, µm
Input coefficients and requirements must correspond to the specific construction and duty. Missing values are never substituted automatically.
A measured clearance and a class range are different kinds of input. The model does not automatically account for misalignment, centrifugal force, or arbitrary housing deformation.
What limits this calculation:
- reference clearance ranges for families other than standard single-row radial ball bearings
- ki and ke coefficients for a hollow shaft, and a light or thin-walled housing