Abstract: A rotary shelf storage unit for mounting in a corner cabinet includes an upper pivot mounting and a lower pivot mounting. The lower pivot mounting includes an adjustable hub mounted on a plate attached to the floor of the corner cabinet. A hub receptacle projects downwardly from the bottom shelf and engages the hub for support of the shelf unit. The hub includes rollers which are biased outwardly for engagement with appropriately positioned detents of the hub assembly. By adjusting the position of the hub relative to its mounting plate, it is possible to control the detent position of the rotary shelf unit. Wheels attached to the bottom shelf ride on the mounting plate to support the shelf unit.