Berekening van een perspassing

Interference δ is typically δ/d ≈ 0.001 and should be corrected for surface roughness. Assumes stresses stay below the elastic limit. If the entered geometry is physically invalid (interface diameter or outer diameter smaller than the bore, or a negative bore), the legacy source silently discards all three diameters and substitutes its own default set (dᵢ=20 mm, d=23 mm, dₒ=80 mm) rather than rejecting the input — preserved exactly. There is no separate output showing the diameters actually used, so an invalid combination is not obviously flagged in the results. Separately, entering dₒ=0 is a supported special case (unlike the reset above) — the legacy source treats it as an effectively infinite outer diameter (a very thick outer part with no defined outer boundary), substituting a large finite stand-in value rather than 0 itself; this is not indicated in the field label.

Methode & referenties

• Lamé’s equations for thick-walled cylinders (elastic regime).
• Default values represent a bronze bush in a steel flange.

• ISO 286-2 hole & shaft tolerance reference tables

De berekening is een letterlijke overzetting van de originele client-side JavaScript van /calculators/e3_8.htm. Resultaten zijn geverifieerd gelijk aan het origineel via een geautomatiseerde golden-master-test. Geen enkele formule is opnieuw afgeleid of “verbeterd”.