Press Fit Force Calculator
Interference pressure and press-in force for a shaft-hub fit.
Heat the hub 100 °C and the interference vanishes (αΔT·d ≈ 0.06 mm on Ø50) — shrink fitting needs a fraction of press force and scores nothing. Mind the hub's hoop stress at the bore.
Formula
Note: K-factor simplification of full Lamé solution; verify critical fits with the complete equations.
Press Fit Force Calculator is a free press fit force for mechanical and machine-design engineers — instant, accurate and 100% client-side, with the governing formula and reference shown next to the result so the number can be defended, not just quoted.
About Press Fit Force Calculator
Interference pressure and press-in force for a shaft-hub fit. The calculation implements p = E·δ/(d·K); F = µ·p·πdL; T = F·d/2 (Interference fits — DIN 7190; Shigley). Heat the hub 100 °C and the interference vanishes (αΔT·d ≈ 0.06 mm on Ø50) — shrink fitting needs a fraction of press force and scores nothing. Mind the hub's hoop stress at the bore.
How to use Press Fit Force Calculator
- 1Enter Nominal joint diameter in mm.
- 2Enter Diametral interference in mm (H7/p6 on Ø50 ≈ 0.02–0.05).
- 3Enter Engagement length in mm.
- 4Enter Friction µ.
- 5Read Contact pressure, Press-in force, Torque it can transmit instantly — no submit button needed.
- 6Need US units? Flip the SI/Imperial toggle and every field converts.
Why use Press Fit Force Calculator?
- ✓Implements the standard formula — p = E·δ/(d·K); F = µ·p·πdL; T = F·d/2
- ✓Reference cited on-page: Interference fits — DIN 7190; Shigley
- ✓One-click SI ⇄ Imperial toggle — values convert in place, physics stays in SI
- ✓Runs entirely in your browser — nothing uploaded, free forever
Frequently asked questions
What formula does the Press Fit Force Calculator use?+
It computes p = E·δ/(d·K); F = µ·p·πdL; T = F·d/2, per Interference fits — DIN 7190; Shigley. The formula is displayed under the result.
What should I keep in mind when using this calculator?+
Heat the hub 100 °C and the interference vanishes (αΔT·d ≈ 0.06 mm on Ø50) — shrink fitting needs a fraction of press force and scores nothing. Mind the hub's hoop stress at the bore. Note: K-factor simplification of full Lamé solution; verify critical fits with the complete equations.
Is this suitable for machine design coursework?+
Yes — these are the exact Shigley/Machinery's-Handbook formulas, with the substitution shown step by step, so you can follow the worked example into your own calculation sheet.
Is the Press Fit Force Calculator free to use?+
Yes — completely free, no sign-up, no limits. It runs client-side in your browser, so inputs stay private and results are instant even on slow connections.
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