Abstract: An apparatus for cutting residual cakes within a bottom-unloading centrifuge so that the residual cake can be discharged without putting the operator in jeopardy. The apparatus comprises first and second cutting members that are vertically spaced from each other and an elongated support member secured to the cutting members. The cutting members and the elongated support member are rotatably and vertically moveable within the centrifuge. The apparatus also includes a locking system for securing and maintaining the cutting members in a first, cutting position and a second, rest position.