The invention relates to a roll handling system for a winder (50) in which cores (1) are applicable each with a material web (2) so that a plurality of rolls (3) consisting of cores (1) wound with the material web (2) are produced with a supply unit (10) in order to transfer a plurality of cores (1) to a receiving unit (20), wherein the receiving unit (20) is movably assembled between the supply unit (10) and a transfer station (60) with which cores (1) are transferable to the winder (50) and rolls (3) are transferable from the winder (50) to the transfer station (60). According to the invention the receiving unit (20) comprises a first contact surface (23) with positioning means (24) in order to align the core (1) at the receiving unit (20) via a positioning device (80) assembled between the supply unit (10) and the transfer station (60).