Abstract: A cutting tool comprising a tool holder (2) with a pocket (22) and a cutting insert (3) in the shape of a polygon having at least three side surfaces (33, 34, 35). The pocket (22) is provided with a base support surface (24) and at least two lateral support surfaces (25, 26). The cutting insert (3) is releaseably securable in the pocket (22) with two side surfaces of the insert (34, 35) abutting the two lateral support surfaces (25, 26) of the pocket (22). At least one of the side surfaces (33, 34, 35) and at least one of the lateral support surfaces (25, 26) are provided with a notch (37) and a complimentary rib element (28) extending in an axial direction of the insert and interacting for providing an end stop of the cutting insert (3) in the pocket (22).

Abstract: A cutting tool for grooving and parting operations, comprising a tool holder provided at one of its side faces with a pocket in the shape of a polygon confined by a base support surface and at least a first and second side support surfaces projecting from the base support surface. A cutting insert is releasably securable in said pocket, said cutting insert being formed with a blade part and a base part with lateral surfaces protruding from the blade part. The base part is received in said pocket, such that a first and a second lateral surface of the base part contact the first side support surface and the second side support surface of the pocket, respectively. The first lateral surface is provided with a recess to the inside of the cutting insert, and the first side support surface is provided with a complementary projection to the inside of the cutting insert.