REPLACEABLE-BLADE-EDGE CUTTING TOOL AND CUTTING INSERT

摘要

An indexable cutting tool of a lever-lock type applies a clamping force. At a bottom of an insert fixing portion, there is formed a pillar-shaped lever in a state in which one end protrudes from a placement surface of the insert fixing portion. A screw applies a pressing force to the lever between the one end and a portion such that the lever is pressed and inclined with the portion s a fulcrum in the middle of the lever so that the one end applies a clamping force to the cutting insert.

主权项

1. A cutting insert used for an indexable cutting tool, the cutting insert comprising:
a through hole (26) formed between a first surface (22) and a second surface (25) that are opposite to each other, the through hole (26) having: a first portion defining a first space adjacent to the first surface (22); a second portion adjacent to the second surface (25) and defining a second space that is larger than the first space; and a constricted portion (26c) formed between the first portion and the second portion so as to connect the first space to the second space.