Patent ID: 8668411

Claim:
A cutting tool ( 10 ) comprising a cutting insert ( 14 ) and a holder ( 12 ), the holder ( 12 ) having a longitudinal holder axis (H) and comprising: a holder shank ( 34 ) and a clamping portion ( 32 ), the clamping portion ( 32 ) comprising a clamping sleeve ( 42 ) and a cage ( 40 ) located within the clamping sleeve ( 42 ), the clamping sleeve ( 42 ) having a longitudinal sleeve axis (S) defining a releasing direction (D), the cage ( 40 ) comprising at least one load member housing ( 48 ) having a load member ( 62 ) accommodated therein, inner and outer cage surfaces ( 44 ), ( 46 ), the inner cage surface ( 44 ) comprising a stopper wall ( 59 ) transverse to the holder axis H, and adjacent minor and major abutment walls ( 58 , 60 ), each extending along the holder axis (H); the clamping sleeve ( 42 ) having inner and outer sleeve surfaces ( 68 , 70 ), the inner sleeve surface ( 68 ) comprising first and second inner sections ( 74 , 76 ) extending over a given length parallel to the sleeve axis (S) and defined by points P 1 and P 2 in a cross section taken perpendicular to the sleeve axis (S); a point P 3 further from the sleeve axis (S) than the points P 1 and P 2 divides the second inner section ( 76 ) into first and second portions ( 78 , 80 ); the cutting insert ( 14 ) having an insert axis B and comprising an insert shank ( 18 ) and a cutting portion ( 16 ), the insert shank ( 18 ) having a peripheral surface ( 26 ) comprising a cylindrical portion ( 28 ) and a non-cylindrical portion ( 30 ), the cutting portion ( 16 ) having a cutting tip ( 20 ) which includes at least one cutting edge ( 22 ); characterized in that, the clamping sleeve ( 42 ) is rotatable between a secured and a released position of the cutting tool ( 10 ); in the released position the load member ( 62 ) is positioned between the second portion ( 80 ) and the holder axis (H); in the secured position, the load member ( 62 ) is positioned between the first portion ( 78 ) and the holder axis (H), the non-cylindrical portion ( 30 ) abuts the major abutment wall ( 60 ), the cylindrical portion ( 28 ) abuts both the minor abutment wall ( 58 ) and the load member ( 62 ), and the load member ( 62 ) abuts the first portion ( 78 ).