Rotational coupling device with bearing shield

A rotational coupling device, comprising:

• a hub assembly configured for rotation about a rotational axis, the hub assembly including a rotor hub disposed about the rotational axis and configured to receive a shaft and a rotor disc extending radially outwardly from the rotor hub;
• an armature disposed on a first axial side of the rotor disc;
• an electromagnet disposed on a second axial side of the rotor disc opposite the armature and fixed against rotation;
• a bearing disposed between the rotor hub and the electromagnet, the hub assembly and the electromagnet separated by an air gap on an outboard side of the bearing, and,
• a shield extending across the entire radial length of the air gap, the shield having a fixed end affixed to the electromagnet and a free end opposite the fixed end, the free end configured for engagement with the hub assembly.

A rotational coupling device, comprising:

• a hub assembly configured for rotation about a rotational axis, the hub assembly including a rotor hub disposed about the rotational axis and configured to receive a shaft and a rotor disc extending radially outwardly from the rotor hub;
• an armature disposed on a first axial side of the rotor disc;
• an electromagnet disposed on a second axial side of the rotor disc opposite the armature and fixed against rotation;
• a bearing disposed between the rotor hub and the electromagnet, the hub assembly and the electromagnet separated by an air gap on an outboard side of the bearing
• wherein one of a component of the hub assembly and the electromagnet defines a radially extending shield axially aligned with, and extending across the entire radial length of, the air gap, the shield forming a unitary body with the one of the component of the hub assembly and the electromagnet.