Cage segment for a segmented cage

A cage segment for a segmented bearing cage, comprising:

• a first end wall and a second end wall configured to oppose a first end surface and an opposite second end surface of a rolling element, and
• a first side wall and a second side wall extending from the first end wall to the second end wall and defining with the first end wall and the second end wall a pocket for receiving the rolling element, the first side wall and the second side wall being configured to oppose a curved side surface of the rolling element,
• wherein the first end wall includes at least one protrusion extending into the pocket and configured to contact the first end surface of the rolling element, and
• wherein the at least one protrusion of the first end wall is kidney shaped.

An assembly comprising:

• a rolling element having a first end surface and a second end surface opposite the first end surface, the first end surface including a central recess surrounded by an abutment region, and
• a cage segment comprising:
• a first end wall and a second end wall opposing the first end surface and the second end surface respectively of the rolling element, and
• a first side wall and a second side wall extending from the first end wall to the second end wall and defining with the first end wall and the second end wall a pocket for receiving the rolling element, the first side wall and the second side wall opposing a curved side surface of the rolling element,
• wherein the first end wall includes at least one protrusion extending into the pocket and configured to contact the first end surface of the rolling element and/or the second end wall includes at least one protrusion extending into the pocket and configured to contact the second end surface of the rolling element,
• wherein the rolling element is mounted in the cage segment with the first end surface of the rolling element in contact with the at least one protrusion of the first end wall and/or the second end surface of the rolling element in contact with the at least one protrusion of the second end wall,
• wherein the at least one protrusion of the first end wall contacts the abutment region, and
• wherein the at least one protrusion does not overly the central recess.