Shrink Fit Calculator:
based on a model found in Newton law of cooling revisited by M Vollmer, European Journal of Physics, July 2009.

Show/Hide Equations


\Delta A=2\alpha (T_{f}-T_{surr})A_{0} \Leftrightarrow A_{f}=2\alpha \Delta TA_{0}+A_{0}

\frac{\pi D^2}{4}=2\alpha \Delta TA_{0}+A_{0} \Leftrightarrow D=\sqrt{\frac{8\alpha \Delta TA_{0}+4A_{0}}{\pi}}

K = -h_{conv}A_{s}(T_{f}-T_{surr})

mc_{p}\frac{(T_{f}-T_{surr})}{\Delta t} = K \Leftrightarrow \Delta t=mc_{p}\frac{(T_{f}-T_{surr})}{K}

Ambient Temperature (T_{surr}): Celsius (20 tpy.)
Target clearance between parts: mm
HUB
Part I: Material
Part I: Mass (m_{1}): kg
Part I: Total surface area (A_{s1}): m2
Part I: Original Diameter (D_{1}): mm
Part I: Target hot temperature (T_{f1}): Celsius (500 limit)
SHAFT
Part II: Material
Part II: Mass (m_{2}): kg
Part II: Total surface area (A_{s2}): m2
Part II: Original Diameter (D_{2}): mm
Part II: Target cool temperature (T_{f2}): Celsius (-196 limit)

Target Temperatures: (T_{f}):

Part I heating estimate:

Part II cooling estimate:

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