Calculator

Shrink Fit Calculator

Calculate the required heating temperature for interference fit assembly — enter shaft and bore dimensions, material, and desired clearance to get the target temperature.

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Shrink Fit Calculator

Thermal Expansion
ΔD = α · D₀ · ΔT
1 Hub / Ring Material
2 Shaft Outer Diameter
mm
3 Bore Inner Diameter
mm
4 Ambient Temperature
°C
5 Desired Assembly Clearance
mm
Results
⌀
Select a material and enter shaft & bore
dimensions to calculate the required temperature.
How it works
  • α = coefficient of thermal expansion (1/°C)
  • D₀ = original bore diameter (mm)
  • ΔT = Trequired − Tambient
  • ΔD = α × D₀ × ΔT = bore expansion
  • Required expansion = interference + assembly clearance
  • T = Tambient + (interference + clearance) / (α × D₀)