Disclosed is a device for deep-rolling transition radii (5, 6) of crankshafts (1). Said device comprises at least one ruler-shaped rolling element (12, 13) that can be moved back and forth in one direction and has a substantially rectilinear contact surface (14, 15), a corresponding guiding surface for introducing a deep-rolling force (F) into a transition radius (5, 6) of a crankshaft (1), said guiding surface lying across from the guiding surface (14, 15) at a certain distance, and a means which generates a guiding and pressing force of the rolling element (12, 13). Said means consists of a guiding roller (29) which is rotatably mounted in the housing (18) of a deep-rolling tool (11) and has a circular guiding surface (24, 25) in relation to the guiding roller (29). The guiding surface of the rolling element (12, 13) adapts to said circular guiding surface (24, 25).
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