Press Fit Engineering and Design Calculator

Torque Engineering and Design
Strength of Materials

An interference fit, also known as a press fit or friction fit, is a fastening between two parts which is achieved by friction after the parts are pushed together, rather than by any other means of fastening.

For metal parts in particular, the friction that holds the parts together is often greatly increased by compression of one part against the other, which relies on the tensile and compressive strengths of the materials the parts are made from. Typical examples of interference fits are the press fitting of shafts into bearings or bearings into their housings and the attachment of watertight connectors to cables. An interference fit also results when pipe fittings are assembled and tightened.

Use this engineering calculator to determine engineering and design parameters for cylindrical press fit applications.


Press Fit Engineering and Design Equations (See Below)

Webpage / Equations Contribution:
Alexander Slocum, MIT Department of Mechanical Engineering (Analsis and Formulas)
Santhosh Mallala, Hyderabad, TG India (Calculator)

Related Resources:

Additional references

References: Slocum, A.H.Precision Machine Design, 1995, Society of Manufacturing Engineers, Dearborn Published by Prentice Hall, 1992.