Rolling elements and methods of manufacturing a rolling element

Rolling elements with at least one rolling element (10; 10a) which is integrally formed and at least one running surface (12; 12a) has at least one electronic unit (14; 14a) and at least one integral and substantially cup-shaped fastening element (16; 16a) comprising at least fifty percent of the electronic unit (14; 14a) in at least one operating position of the rolling element acting weight force on the rolling element (10; 10a) which transmits the fastening element (16; 16a) at least a material fit on the rolling element (10; 10a ) is attached.