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Press / Shrink Fit

Thick-wall Lamé interference between a shaft (bore d_i, 0 = solid) and hub (outer D_o) at interface Ø d. Units: mm, E in MPa, diametral interference in mm → pressure & stress in MPa, force in N.

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Interface Ø d (mm)

Hub outer Ø D_o (mm)

Shaft bore Ø d_i (mm)

Diametral interference (mm)

E hub / shaft (MPa)

Poisson ν

Friction µ

Engagement length L (mm)

Contact pressure

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Hub hoop @ bore

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Holding force

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Torque capacity

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Same-material assumption if E hub = E shaft. A helper, not a substitute for engineering judgment.