Heating temperature of shrink-fits
Shrink-fits are assembled by heating to temperatures where the
expansion exceeds the interference. The necessary temperature change can be
calculated as
dt = δ / α di (1)
where
dt =
temperature difference (oC, oF)
δ =
diametral interference (mm, in)
α = coefficient
of linear expansion (m/moK, in/inoF)
di
= initial diameter of hole before expansion (mm, in)
Diametral interference can be calculated as
δ = dt α di (2)
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