Method and tools for manufacturing a bladed disk

A method of manufacturing a bladed disc (blisk) is disclosed, together with a milling tool 201 for performing the method. The blank is securely mounted, and a milling tool 201 is mounted to a machining device proximate the blank. The milling tool 201 comprises at least one cutting tooth 204 having at least one axial radius of curvature 207, the tool itself being a separate aspect of the invention. The blank is milled into a semi-finished blisk with a succession of passes, for instance following a trochoidal path. The at least one axial radius of curvature 207 of the tool allows milling closer to the tolerances of the finished blisk in fewer passes. The tool may have a ball end or a flat end 301, teeth may be provided on the flat end. The teeth may include sinusoid crenulations for chip breaking.