Patent ID: 7837416

Claim:
An indexable cutting insert ( 1 ) comprising a body ( 8 ), a base layer ( 12 ) formed on the body ( 8 ), and a use-state indicating layer ( 13 ) formed on the base layer ( 12 ); wherein the body ( 8 ) has at least one face ( 2 ), at least two flanks ( 3 ), at least one edge line ( 4 ), and at least one corner ( 9 ); each of the flanks ( 3 ) and the face ( 2 ) are connected to each other with the edge line ( 4 ) provided therebetween; the corner ( 9 ) is a point of intersection of the two flanks ( 3 ) and the face ( 2 ); the base layer ( 12 ) has a color different from the use-state indicating layer ( 13 ); and the use-state indicating layer ( 13 ) is formed on at least one of the flanks ( 3 ) so that the use-state indicating layer ( 13 ) is formed on the base layer ( 12 ) over the entire surface or a part of a region A 2 excluding at least one region A 1 of at least 2 mm 2 containing at least one corner ( 9 ).