High conical angle touch down bearing

A machine comprising:

• a rotor (101, 301, 401) and a stator (102, 402),
• main bearings (103, 403) for supporting the rotor rotatably with respect to the stator, and
• at least one safety bearing (104, 304, 404a, 404b) for supporting the rotor rotatably with respect to the stator in a situation where the main bearings are non-operating,
• wherein there are a radial clearance (105) and an axial clearance (106) between the rotor and the safety bearing when the rotor is supported by the main bearings, wherein a contact surface (107, 307) of the rotor arranged to contact the safety bearing in response to closure of the axial clearance is oblique with respect to a spatial plane perpendicular to a rotational axis of the rotor so that an angle (α) between the rotational axis of the rotor and a normal of the contact surface at a point of contact between the rotor and the safety bearing is greater than zero and at most 5 degrees.