// multi-utility computation suite · offline · instant · precise
┌──────────────────────────┐
│ [c] calcalyst_ │
│ computation suite │
└──────────────────────────┘
// select a module to initialize
/ search↵ open firstesc close
// adsenseEMPTY_LEADER_SLOT728×90
// keyboard shortcuts
/focus search
Escclear search · close calc
Enteropen first result
↑↓navigate list
?toggle this panel
// adsenseMOBILE_ANCHOR_SLOT320×50
// keyboard_shortcuts
/focus search
↑↓navigate module list
Enter
open first result from search
open highlighted
compute when module is open
compute when focused in a field
Escclose module · clear selection
⌫
eng.press-fit-interference Calculator
Calculates the interference fit contact pressure, hub stress, and assembly force from shaft and hub dimensions and material properties. Interference fit retention force depends on friction coefficient and contact pressure — the assembly force is typically 3–4× the retention force due to misalignment on press entry.
Inputs
Shaft Diameter Mm
Distance across a circle through its centre. Always confirm units match the rest of the calculation.
Hub Outer Diameter Mm
Distance across a circle through its centre. Always confirm units match the rest of the calculation.
Interference Um
Reference formula or conversion factor shown for context.
Young Modulus Gpa
Reference formula or conversion factor shown for context.
Poisson Ratio
Reference formula or conversion factor shown for context.
Results
interface pressure p (MPa)
Sample size or count used in the calculation.
interference (µm)
Sample size or count used in the calculation.
K factor
A dimensionless multiplier applied in the calculation.
p = Eδ/(dK)
Reference formula or conversion factor shown for context.
max tangential stress (MPa)
Internal force per unit area (Pa or MPa). Must stay below yield strength in service. Beyond yield: permanent deformation. Beyond tensile strength: fracture.
ISO 286
Reference formula or conversion factor shown for context.