Abstract: A centrifuge for separating out particulate matter from a fluid includes a rotor shell that is rotatably coupled to a shaft through a first bushing and a second bushing. The shaft includes a first shaft section that is detachably coupled to a second shaft section in order to make maintenance and assembly of the centrifuge easier by reducing the shaft clearance needed during disassembly and assembly of the centrifuge. The first shaft section includes a first bushing race around which the first bushing is rotatably received. The second shaft section includes an integrally formed bushing collar for supporting the second bushing and a second bushing race around which the second bushing is rotatably received. With such a construction, the size of the bushings in the centrifuge can be minimized, which in turn increases the operational speed of the centrifuge, thereby enhancing the particulate removal efficiency in the centrifuge.