Abstract: This invention relates to a shell-type milling cutter and a method for attaching the same wherein an area for allowing a shell-type milling cutter (1) to be in closely contact with a cutter arbour (3) is increased, whereby it makes possible a heavy-duty cutting work at a high speed which is close to that of an integral structure type milling cutter (1), besides attachment and exchange for the shell-type milling cutter can be very easily carried out.The shell-type milling cutter and the method for attaching the same according to the present invention are attained by such a manner that a fitting hole (1a) of the milling cutter (1) is formed as a tapered hole, a projection (2c) of a bush (2) is engaged with a concave groove of a clamping bolt (4), and the bush (4) is forcibly inserted into the fitting hole to secure the milling cutter (1) to the cutter arbour (3).

Abstract: The present invention relates to a method for attaching a shell-type milling cutter wherein an area for fastening the shell-type milling cutter to its cutter arbor is increased to raise rigidity and attachment strength thereby making high-speed and heavy-duty cutting possible, so that the cutting efficiency thereof becomes substantially identical to that of an integral structure type milling cutter, besides exchange of the milling cutter can very simply be attained.The method for attaching a shell-type milling cutter according to the present invention is conducted by such a manner that the inside diameter portion of a shell-type milling cutter is formed into a tapered hole, and a bush is forcibly inserted in a gap defined between the tapered hole and a fitting shaft of a cutter arbor, whereby the milling cutter is fixed to the cutter arbor.