Abstract: In order to significantly reduce the weight of a single-piece cam (2) of a built camshaft, the cam (2), seen from the semi-cross-sectional point of view, comprises a T-shaped cross section having a narrow bridge (4) that extends towards the center thereof and a wraparound top (5) which protrudes by approximately the same distance on both sides and has an approximately constant cross section. The inventive cam (2) is preferably produced by hot forging or cold forging a semifinished pipe or round plate. Preferably, a camshaft comprising a shaft and at least one cam (2) is assembled by providing the support axle with an enlargement in the joining area by means of rolls, rollers, or knurls, said enlargement being greater than the inner diameter of the cam (2), and by inserting the cam (2), resulting in a positive and/or non-positive connection between the support axle and the cam (2).

Abstract: A camshaft receives cams and camshaft bearings. The chamshaft is rectified in the zones receiving the camshaft bearings such that the diameter of the shaft in the bearing zones is smaller than the diameter of the shaft in the cam receiving zones. Thus, it is possible to mount the cams simply without damaging the bearing zones when the cams are mounted on the shaft, and to provide an economical manufacturing process.