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TOOL IDB-MEC-006
Press-fit interference

Desktop only

Engineering tools are available only on desktop screens.

Press-fit interference

Contact pressure, transmittable torque, and axial holding force for a shaft pressed into a hub. Assumes elastic, same material.

Cross-section p = —
D = 10 mm Do = 20 mm δ 20 µm
Engineering notes

Formulas (Lamé, same material)

  • p = (E · δ) / D · (Do² − D²) / (2 · Do²)
  • Force: F = π · D · L · p · f
  • Torque: T = F · D / 2

Watch-outs

  • Check hub hoop stress doesn't exceed yield.
  • Thermal expansion swings δ by 0.01–0.05%.
  • Friction drops with oil — design f = 0.08–0.10 worst case.

Result

Live