TourTourInterference fit of a hollow shaft in a bore
 Calculation of mounting force and transmissible torque1
  Min   Max    
 Diameter hollow shaft d1    -     10-3 m
 Diameter bore d2  -     10-3 m
 Wall thickness shaft s  -     10-3 m
 Interference length L  -     10-3 m
 Modulus of elasticity shaft E  -     GPa
 Ultimate tensile stress shaft Rm  -     MPa
 Coefficient of friction µ  -     -
 
Deterministic approach
 Contact pressure p   -    MPa
 Mounting force Ff   -    kN
 Transmissible torque Tf    -    Nm
Probabilistic approach ( ±2.5% failure probability )
 Contact pressure p   -    MPa
 Mounting force Ff   -    kN
 Transmissible torque Tf    -    Nm
1The compressive stress in one of the elements is set to the ultimate tensile stress since plastic deformation is assumed ( ε=Δd/d>Rm/E ). Thin walled components stressed in the elastic regime can be calculated with the standard calculator for interference fits.

Note that the ±2.5% failure probability makes that 95% of the assemblies fall between the max and min values calculated.
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