Abstract: The invention relates to a rotary atomizer (1) for coating components comprising a bell cup shaft (3) and a spray bell (4) that is regionally insertable into the bell cup shaft (3) and releasably attached to the bell cup shaft (3). The spray bell (4) includes at least one ferromagnetic element (11, 18) or at least one permanent magnetic element (7) and the bell cup shaft (3) includes at least one permanent magnetic element (7) or at least one ferromagnetic element (11, 18), which are arranged in relation to one another such that the ferromagnetic element (11, 18) and the permanent magnetic element (7) exert a magnetic retaining force on one another acting parallel to the axis of rotation of the bell cup shaft (3) in order to releasably retain the spray bell (4) on the bell cup shaft (3).