Ferramenta de corte rotativa, método de corte de tarugo para a fabricação de cano ou tubo sem emenda, e método de fabricação de cano ou tubo sem emenda

An object of the present invention is to provide a rotary cutting tool, a method of cutting a billet for manufacturing a seamless pipe, and a method of manufacturing the seamless pipe, which are capable of restraining the occurrence of an outer surface flaw on the seamless pipe. A rotary cutting tool 100 in accordance with the present invention has substantially circular shape and is provided with a plurality of blade parts 1 along the outer peripheral portion thereof. The end face 11 on the downstream side in the direction of rotation of the blade part 1 tilts at an angle ¸ not smaller than 1 degree and not larger than 10 degrees with respect to the thickness direction Y intersecting at right angles to the direction of rotation X.