PURPOSE: A method for manufacturing a separating disc for a separating disc type centrifugal separator is provided to rapidly and conveniently perform the insertion of a protrusion portion into a fitting hole without any error. CONSTITUTION: A position fitting conic plane(50) is used in a process in which a band-shaped separation barrier is a certain position of a conic plane(21) of a separation plate. A position fitting hole(51) is installed at a position corresponding to the certain potion of the conic plane and has an identical shape to that of a protrusion portion.
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