MP-65 · MATERIALS AND FITS
Thermal Expansion Clearance Change
Estimate clearance change between two materials across a temperature change from nominal diameter and expansion coefficients.
Preliminary design support. Your inputs and results stay in this browser.
WHAT THIS SCREEN ANSWERS
A fit can change with temperature when the hole and shaft materials expand at different rates. The screen uses entered expansion coefficients and nominal diameter to show the free clearance trend. Use the visible relationship before moving to catalog selection.
Temperature gradients, constrained geometry, coatings, tolerance, material properties, and assembly sequence can change the actual result. Confirm material data, temperature range, fit limits, gradients, coatings, assembly, and service conditions. The simplified relation does not resolve it.
A fit can change with temperature when the hole and shaft materials expand at different rates. Temperature gradients, constrained geometry, coatings, tolerance, material properties, and assembly sequence can change the actual result. The displayed relation is intentionally simpler than a release calculation.
The screen uses entered expansion coefficients and nominal diameter to show the free clearance trend. Confirm material data, temperature range, fit limits, gradients, coatings, assembly, and service conditions. The decision remains specific to this application because a fit can change with temperature when the hole and shaft materials expand at different rates. Turn the remaining unknowns into a short verification list.