Cylindrical Press-Fit Interference
This tool calculates the stresses, interface pressure, axial force, and torque capacity for an interference fit between two cylinders (e.g., a shaft pressed into a hub). Enter the material properties and dimensions, then click Calculate.
Cross-Sectional View of Cylinders
Radial Stress Distribution
Hoop Stress Distribution
Equivalent (Von Mises) Stress Distribution
Diagnostics will appear here…
Explanation of Terms
- Inner Cylinder: Typically the shaft or inner part being pressed in.
- Outer Cylinder: Typically the hub or outer part receiving the press fit.
- Hoop Stress (σθ): Tangential stress around the circumference, like tension in a ring.
- Radial Stress (σr): Stress directed toward or away from the center.
- Equivalent Stress (σeq): Von Mises stress, used to predict yielding for safe design; combines hoop and radial stresses.
- Interface Pressure (P): The compressive pressure at the contact surface due to the interference.
- Axial Force (F): Maximum pull-out force resisted by friction.
- Torque (T): Maximum rotational torque resisted by friction.
- Graphs: Show stress variation from inner radius to outer radius. Blue line: inner cylinder; Red line: outer cylinder; Dashed line: interface. Note: Radial stress is continuous at the interface, but hoop and equivalent stresses typically show a discontinuity due to the different components.
Hover over input/output labels for more details. Ensure stresses are below material yield strength for safe design for elastic behavior.