Patent ID: 8449228

Claim:
A cutting tool comprising a cutting insert and a holder, the holder having a longitudinal holder axis H and comprising: a holder shank and a clamping portion, the clamping portion comprising a clamping sleeve and a cage located within the clamping sleeve, the clamping sleeve having a longitudinal sleeve axis (S) defining a releasing direction (D), the cage comprising at least one load member housing having a load member accommodated therein, the cage having inner and outer cage surfaces, the inner cage surface comprising a major abutment wall connected to a minor abutment wall, the major abutment wall forming an angle α≦90° with a plane (T) tangent to the minor abutment wall; and a stopper wall perpendicular to the minor and major abutment walls, the minor and major abutment walls being parallel to the holder axis (H); the clamping sleeve having inner and outer sleeve surfaces, the inner sleeve surface comprising first and second inner sections 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 into first and second portions; the cutting insert having an insert axis (B) and comprising an insert shank and a cutting portion, the insert shank having a peripheral surface comprising a cylindrical portion and a non-cylindrical portion, the cutting portion having a cutting tip which includes at least one cutting edge; wherein, the clamping sleeve is rotatable between a secured and a released position of the cutting tool; in the released position the load member is positioned between the second portion and the holder axis (H); in the secured position, the load member is positioned between the first portion and the holder axis (H), the non-cylindrical portion abuts the major abutment wall, the cylindrical portion abuts both the minor abutment wall and the load member, and the load member abuts the first portion.