shrink-fitting technical
shrink fit

Typically this was for the shrink-fitting of components such as large crankpins in crankshafts or flywheels.

As a result, each bearing must be made and finish-ground individually; then assembled into a built-up crankshaft, usually by shrink-fitting.

Other methods of shrink-fitting include compression shrink fitting, which uses a cryogen such as liquid nitrogen to cool the insert, and shape memory coupling, which is achieved by means of a phase transition.

The sleeves can be pressed into place, or they can be held in by a shrink fit.

When the engine block cools down it shrink fits around the sleeve holding it into place.

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Then the next hoop (either B2 or C1) is similarly heated so the assembled A tube and B1 jacket can be lowered into position for a successive shrink fit.