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This Rev-A-Shelf 4B-7-1 is a 7-inch aluminum swivel bearing designed for full circle lazy susan shelves that rotate without a built-in stop, making it a go-to component for new builds and shelf replacements alike.
Corner cabinets that use full circle shelves need a reliable swivel point at the shelf center, and that is exactly what this bearing provides. The 7-inch size suits installations where the shelf center post occupies a smaller footprint, typically in narrower corner configurations or where the center column is sized to match. Because this version has no stop, the shelf can complete a full rotation in either direction without latching into a set position. That makes it well suited to kitchens where the cook wants to spin through stored items in one continuous motion rather than moving between fixed positions.
The bearing is aluminum, which brings two practical advantages over a steel equivalent: it resists corrosion in a kitchen environment where moisture and cleaning products are routine, and it adds less weight to the assembly, which matters on a shelf stack that turns on a single center point. The aluminum construction also stays consistent in temperature cycling, so it does not stiffen up in a cabinet that gets warm near an oven wall.
Cabinet shops building corner units with full circle shelf sets will find this bearing useful as a standard stock component for the assembly line. Designers specifying a shelf replacement or a new lazy susan build in a smaller corner cabinet can call it out directly by the 7-inch diameter and the no-stop configuration. Homeowners replacing a worn or failed bearing in an existing full circle susan should confirm the center bearing diameter matches before ordering, since this part is sized for 7-inch applications and does not interchange with the 10-inch version in the same line. If the existing installation uses a stop to hold the shelf in a parked position, the 4BS series with stop is the correct alternative.
The 4B series, including this bearing, is designed for full circle shelves without a stop, so the shelf rotates freely in any direction. The 4BS series adds a stop that holds the shelf at a set position. Choose based on whether your application calls for free rotation or a parked shelf position.
No. This bearing is for full circle shelves only. Kidney and D-shaped shelves use the 4BS series, which includes a stop to prevent the shelf from rotating into the cabinet frame.
This bearing is 7 inches in diameter. If your current center bearing or the opening in your shelf hub is sized differently, check the 10-inch version in the 4B line. Matching the bearing diameter to the existing hardware is the key fit spec.
For a lazy susan bearing, aluminum is lighter and resists corrosion better than uncoated steel, which is an advantage in a kitchen. If load capacity or a heavier shelf stack is a concern, compare the aluminum and steel versions in the same diameter to choose the right one for your build.
Specify this 7-inch aluminum bearing when the build calls for a full circle shelf that spins without restriction, and the center point needs to be compact, light, and corrosion-resistant.
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