Abstract: There is provided a rotation part of a rotary machine, the rotation part including: a base unit including a surface constituting fluid channels; a plurality of blade units protruding from the base unit; a plurality of shroud segment support units connected to the plurality of blade units and extending in a parallel direction to the surface of the base unit; a shroud segment disposed between and bonded to adjacent shroud segment support units of the plurality of shroud segment support units; and a first reinforcing unit provided on an intersection portion between a blade unit of the plurality of blade units and a shroud segment support unit of the plurality of shroud segment support units, wherein a distance from a protruding direction center line of the blade unit to an end portion of the shroud segment support unit is greater than a maximum distance from the protruding direction center line of the blade unit to an end portion of the first reinforcing unit.

Abstract: A cutting tool includes a holder and at lest two first cutting inserts. The holder has a number of insert pockets in order to receive those cutting inserts. The cutting inserts are mounted in the holder such that their radially outermost portions lie substantially in an imaginary circle. The circle constitutes an effective diameter of the cutting tool. The cutting tool, in addition, includes at least one second cutting insert provided for a machining operation different from that of the first cutting inserts. The second cutting insert is spaced radially inwardly from the circle.