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Assembly of Shrink-Fits
Heating temperature of shrink-fits
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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 = diametric interference (mm, in)
α = coefficient of linear expansion (m/moK, in/inoF)
di = initial diameter of hole before expansion (mm, in)
Diametric interference can be calculated as
δ = dt α di (2)
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