A wheel disc includes a hub located centrally within the wheel disc and defining a wheel axis. The wheel disc further includes an outer circumferential edge and a transition portion radially extending between the hub and the outer circumferential edge. The transition portion has a front surface and a rear surface such that the front surface has a relatively smooth profile and the rear surface has a plurality of concentric ring-shaped curvatures formed therein, thereby providing the transition portion with a variable thickness between the front and rear surfaces.

An automated container wheel manufacturing system includes a bracket and wheel end cap laser and staging subsystem, an axle sawing subsystem, an axle housing machining subsystem, and a wheel pipe sawing subsystem. The wheel end cap laser and staging subsystem is configured to manufacture mounting brackets and wheel end caps, the axle sawing subsystem is configured to manufacture axle housings, the axle housing machining subsystem is configured to manufacture axle housings, and the wheel pipe sawing subsystem is configured to manufacture wheel pipes. An assembly and welding area includes a plurality of robotic welding arms and an I-beam to which the plurality of robotic welding arms are attached for movement within a robotic zone. There is an axle housing and wheel end cap welding region, a wheel pipe welding region, and a bracket and axle welding region.

A vehicular wheel bearing includes: a wheel hub having a bent portion formed by bending a vehicle-body side end in a radially outward direction; at least one inner ring coupled on an outer peripheral surface of the wheel hub; an outer ring provided to be spaced apart from the wheel hub and the at least one inner ring in the radially outward direction; rolling bodies provided between the wheel hub and the outer ring; and a coupler ring disposed between the inner ring and the bent portion. The coupler ring includes an inner coupler-ring spline portion, and a ring-shaped inner protrusion portion. A first interference magnitude between the inner protrusion portion and the wheel hub may be set to be greater than zero such that the inner protrusion portion and the wheel hub are coupled to each other in a loosely fitting manner.

An automated container wheel manufacturing system includes a bracket and wheel end cap laser and staging subsystem, an axle sawing subsystem, an axle housing machining subsystem, and a wheel pipe sawing subsystem. The wheel end cap laser and staging subsystem is configured to manufacture mounting brackets and wheel end caps, the axle sawing subsystem is configured to manufacture axle housings, the axle housing machining subsystem is configured to manufacture axle housings, and the wheel pipe sawing subsystem is configured to manufacture wheel pipes. An assembly and welding area includes a plurality of robotic welding arms and an I-beam to which the plurality of robotic welding arms are attached for movement within a robotic zone. There is an axle housing and wheel end cap welding region, a wheel pipe welding region, and a bracket and axle welding region.