Variable angle torque tube interface with hard stop

A variable angle torque tube interface comprising:

• a bearing configured to be attached to a torque tube, the bearing defining a circumferential channel and having a rounded external surface portion;
• a bearing housing coupled to the bearing, the bearing housing defining an axial channel and having a rounded internal surface portion, wherein the rounded internal surface portion of the bearing housing interfaces with the rounded external surface portion of the bearing to allow the bearing at least some rotation within the bearing housing about a tracking axis, a pitch axis, and a yaw axis;
• and
• a pin positioned at least partially within the circumferential channel and at least partially within the axial channel to allow the at least some rotation by the bearing within the bearing housing about the tracking axis, the pitch axis, and the yaw axis and limit an amount rotation by the bearing within the bearing housing about the tracking axis;
• wherein, the axial channel in the bearing housing does not extend through an entire width of the bearing housing such that the pin is enclosed between the bearing housing and the bearing.