In a roller bearing having rolling bodies or balls (2) which are received between annular bearing shells (1, 3), segments (5) in grooves (4) are inserted into an inner or outer annular bearing shell (1, 3) in a manner which extends in the circumferential direction or, in the case of split bearing rings (1, 3), into a division, the material of which (for example, Invar) has a lower thermal expansion than the material of the inner ring (3) in order to prevent axial shrinkage in the case of a temperature change.
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