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This Rev-A-Shelf 4BS-7-1 is a 7-inch aluminum swivel bearing designed specifically for kidney and D-shaped lazy susan shelves, with an integrated stop mechanism that controls shelf rotation.
Kidney and D-shaped shelves are cut to clear the cabinet face frame or door opening, which means they only function correctly through a defined arc of rotation. Without a stop, a D-shaped shelf can swing past the opening and jam against the cabinet frame, or worse, tip its contents into the cabinet wall. The integrated stop on this bearing limits travel to the usable arc, so the shelf reaches the door opening and stops there rather than spinning through it. This is the detail that separates a stop-bearing from a no-stop model, and it is the reason kidney and D-shaped shelves almost always require one.
The bearing is machined from aluminum, which resists the moisture and cleaning-product exposure common inside base cabinets better than uncoated steel. At 7 inches, it fits the center-post location of a standard half-shelf lazy susan in a base corner cabinet. Aluminum also keeps rotational weight low, so the shelf assembly spins freely without needing heavy-handed motion. The bearing plate is full-circle in form, giving a stable, centered mount point even though the shelf above it is not round.
Cabinet shops building kidney or D-shaped lazy susans into corner base cabinets will specify this bearing as the functional center of the shelf assembly. It is equally useful for a homeowner or contractor replacing a worn or damaged bearing on an existing unit. If the original shelf has a stop and the shelf is kidney or D-shaped, this is the replacement that matches both requirements. Cabinet designers specifying Rev-A-Shelf hardware for a new build can pair this bearing with compatible shelf and pole components from the same line. For a full-circle shelf that does not need rotation control, a no-stop bearing is the appropriate choice instead.
This bearing includes a stop that limits how far the shelf rotates. That is essential for kidney and D-shaped shelves, which are shaped to align with the door opening and should not spin freely past it. A no-stop bearing lets the shelf spin continuously and is intended for full-circle shelves.
It can physically mount under a full-circle shelf, but the stop will restrict rotation. For full-circle shelves that need unrestricted spin, choose a no-stop bearing. This bearing is engineered for kidney and D-shaped shelf formats where controlled travel matters.
This is sold as an individual bearing component. It is used in new lazy susan builds and as a replacement for worn bearings in existing kidney or D-shaped shelf assemblies. Other shelf, pole, and hardware components are sold separately.
It is intended for corner base cabinets with a center pole or shaft, which is the standard configuration for kidney and D-shaped lazy susans. Confirm the center-to-center pole spacing and shaft diameter against your cabinet before ordering.
Pair this 7-inch aluminum stop bearing with compatible Rev-A-Shelf kidney or D-shaped shelf components to build or restore a corner lazy susan that rotates cleanly to the opening and holds its position.
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