Abstract: The invention relates to a device (10) for cutting a workpiece (38), mounted onto an elongate rod (36), into a spiral formation. The device includes a frame (12) defining a workspace (14), and locating means (34) for locating the rod longitudinally along the workspace. A chuck (40), rotatable about an axis of rotation, is located in the workspace for holding and rotating the work piece about an axis co-axial with the axis of the rod. A carriage (44) which is transportable longitudinally along the workspace releasably mounts a cutting tool (46) extending transversely to the workspace. The device includes also transport means (48) for transporting the carriage longitudinally along the workspace and displacement means (34) for displacing the locating means, and hence in use the rod, longitudinally along the workspace. The device further includes drive means (52) for driving the transport means, the displacement means and rotatingly driving the chuck.