Patent ID: 8647028

Claim:
An indexable double-ended cutting insert ( 16 ) having an insert symmetry axis (V), about which the cutting insert ( 16 ) has 180° rotational symmetry, the insert symmetry axis (V) defining an upward to downward direction, the cutting insert ( 16 ) comprising: an insert upper surface ( 24 ), an opposing insert lower surface ( 26 ), two opposing insert side surfaces ( 28 ) extending therebetween, and opposing end surfaces ( 30 ) extending between the insert upper and lower surfaces ( 24 , 26 ) and between the insert side surfaces ( 28 ); a longitudinally extending body portion ( 20 ) having a central portion ( 32 ) and two insert cutting portions ( 34 ) located at opposite ends of the body portion ( 20 ) and formed integrally with the central portion ( 32 ); and an insert clamping portion ( 22 ) extending downwardly from the central portion ( 32 ) in a direction away from the insert upper surface ( 24 ); each insert cutting portion ( 34 ) has a rake surface ( 36 ) formed in the insert upper surface ( 24 ) and a relief surface ( 38 ) adjacent the rake surface ( 36 ), the rake and relief surfaces ( 36 , 38 ) meeting at an edge, at least a portion of the edge forming a front cutting edge ( 40 ); the insert lower surface ( 26 ) comprising a bottom surface ( 44 ) located on the insert clamping portion ( 22 ) and facing in a direction away from the insert upper surface ( 24 ), two insert abutment surfaces ( 50 ), two first locating surfaces ( 46 ) and two second locating surfaces ( 48 ); the two first locating surfaces ( 46 ) and two insert abutment surfaces ( 50 ) being located on the insert clamping portion ( 22 ), each first locating surface ( 46 ) and each insert abutment surface ( 50 ) extending from the bottom surface ( 44 ) towards a respective adjacent second locating surface ( 48 ), each second locating surface ( 48 ) being located on a respective insert cutting portion ( 34 ); each first locating surface ( 46 ) defining an insert locating axis (A); wherein, in an end view of the cutting insert ( 16 ): the insert locating axes (A) of the first locating surfaces ( 46 ) form an acute angle α therebetween, and each insert locating axis (A), associated with a front cutting edge ( 40 ) on one half of the cutting insert ( 16 ), is perpendicular to a front cutting edge ( 40 ) located on a second half of the cutting insert ( 16 ).