Rotational speed measuring device for motor vehicle, has sensor disk including disk element that is made of plastic in injection molding process, and signaling elements arranged on outer peripheral surface of disk element

摘要

The device has a sensor disk (10) including a disk element (12), and signaling elements (14) arranged at an outer peripheral surface (22) of the disk element. The disk element is made of plastic in an injection molding process, and the signaling elements are made of metal or plastic. The signaling elements are partially surrounded by the plastic of the disk element, where the plastics of the disk and signaling elements are selected from a group consisting of polyamide, polypropylene, polyethylene and/or fiber-reinforced plastic.