Wheel hub unit with thermally insulating coating for reducing the thermal load on a wheel bearing

A wheel hub unit comprising:

• a wheel hub;
• a contact flange connected to the wheel hub;
• and
• a contact surface formed by a radially outward facing surface and an annular surface of the contact flange and part of a radially outward facing surface of the wheel hub, wherein the radially outward facing surface of the contact flange and the radially outward facing surface of the wheel hub forming the contact surface includes a thermally insulating coating, the radially outward facing surface of the contact flange is configured to come into mechanical contact with a brake hat, the thermally insulating coating configured to reduce heat transfer between the radially outward facing surface of the contact flange and the brake hat upon mechanical contact with the brake hat;
• wherein the thermally insulating coating has a thermal conductivity of less than 2.0 W/(m·K) at a temperature above 350° C.