The clearance surfaces (13) are convexly shaped and function as a protection for the adjacent main cutting edge of the cutting insert (10) against impacts during machining of a work piece.

• 这些余隙面(13)形状为凸形，并且用于保护切削嵌入件(10)的相邻主切削刃在对工件进行机加工期间不会受到冲击。