Patent ID: 8678989

Claim:
A separating disk adapted to be included in a disk package of a centrifuge rotor of a centrifugal separator, comprising: the separating disk having a tapering shape and extending around an axis (x) of rotation and along a tapering rotary symmetric surface (y) along the axis (x) of rotation, wherein the separating disk has an inner surface and an outer surface, wherein the separating disk is manufactured of a material, wherein the separating disk is configured in such a way that it creates an interspace between the separating disk and an adjacent separating disk in the disk package and thus comprises first protrusions extending outwardly from the tapering rotary symmetric surface (y) and second protrusions extending inwardly from the tapering rotary symmetric surface (y), wherein each first and second protrusion defines a contact zone adapted to abut an adjacent separating disk in the disk package, wherein the contact zones of the first protrusions are displaced in relation to the contact zones of the second protrusions seen in a normal direction with regard to the outer surface, wherein the first and second protrusions are provided after each other in a peripheral direction of the centrifugal separator; and wherein the tapering shape and the protrusions of the separating disk have been provided through pressing of a blank of said material against a tool part which has a shape corresponding to the tapering shape with the protrusions of the presses separating disk; and each contact zone has a continuously convex shape seen in a cross-section.