A CUTTING INSERT

摘要

The trailing mounting portion (4) has upper, lower and side walls (12, 13) extending from the front cutting portion (2) to a rear abutment wall (14) of the trailing mounting portion (4) oriented generally co-directionally with said operative front surface (3). The side walls (13) of the trailing mounting portion (4) meet with the rear abutment wall (14) at rear edges (15). The rear abutment wall (14) comprises two lateral surfaces (20) and a central surface (22) therebetween. The lateral surfaces (20) converge from the rear edges (15) in the direction towards the front cutting portion (2), and the central surface (22) protrudes, in the direction away from the front cutting portion (2), outwardly from adjacent portions of the lateral surfaces (20) and meeting therewith at merging edge regions (23).