Insert holder having transversely oriented insert receiving pocket with resilient upper jaw having outer flexibility groove and cutting tool

An elongated insert holder (24), having a holder longitudinal axis (B) defining opposite forward to rearward directions (DF, DR), the insert holder (24) comprising:

• a holder peripheral surface (26) extending circumferentially about the holder longitudinal axis (B), the holder peripheral surface (26) intersecting, and forming a boundary of, a holder end surface (28) at a forward end of the insert holder (24);
• a shank portion (30) and an insert mounting portion (32) located at a forward end thereof, the insert mounting portion (32) comprising:
• upper and lower jaws (34, 36) which are spaced apart by a clamping recess (38), the clamping recess (38) being recessed in the holder end surface (28) and opening out to the holder peripheral surface (26) at first and second recess side openings (40a, 40b), the upper jaw (34) being resiliently movable with respect to the lower jaw (36) by rotating around a pivot axis (P);
• and
• a transversely oriented insert receiving pocket (46) configured to receive a cutting insert therein, the insert receiving pocket (46) being formed in the clamping recess (38) and defined, at least partially, by pocket upper and lower surfaces (48, 50) formed on the upper and lower jaws (34, 36), respectively, and extending longitudinally along a pocket longitudinal axis (L) to the first recess side opening (40a) to define a pocket front opening (52a);
• wherein:
• a pocket longitudinal plane (LP) located between the pocket upper and lower surfaces (48, 50) contains the pocket longitudinal axis (L);
• the pocket lower surface (50) comprises a pocket lower clamping surface (54);
• the pocket upper surface (48) comprises a pocket upper clamping surface (60) which faces mutually towards the pocket lower clamping surface (54);
• the insert receiving pocket (46) comprises a pocket stopper surface (68) formed at one of the pocket upper and lower surfaces (48, 50), facing generally towards the pocket front opening (52a);
• and
• the upper jaw (34) comprises an outer flexibility groove (82) recessed in the holder peripheral surface (26), and is configured to resiliently clamp a cutting insert in the insert receiving pocket (46) without the use of an additional, separate clamping device.