Abstract: The chair base of the present invention has a dual-tapered locking hub. A first tapered portion is provided for a major portion of the internal core, and a second tapered portion is provided in the remainder of the internal core. The taper angle of the second portion is greater than the taper angle of the first portion. The first tapered portion prevents wobbling of the central column within the chair base after extensive use, whereas the second tapered portion prevents creeping of the central column through the chair base and locks in the central column.