Cutting blade having a clamping bore with a coolant inlet, blade holder and cutting tool

A cutting blade (20) having a blade width W and comprising:

• opposite first and second blade side surfaces (22, 24);
• a peripheral blade surface (30) connecting the first and second blade side surfaces (22, 24);
• a first insert seat (50) located at an intersection of the first blade side surface (22), the second blade side surface (24) and the peripheral blade surface (30);
• a first blade inlet (80a);
• a first blade outlet (82a) opening out towards the first insert seat (50) and in fluid connection with the first blade inlet (80a);
• and
• a first blade bore (60) opening out to the first and second blade side surfaces (22, 24), the first blade bore (60) having a first blade bore axis (B) defining an outward-radial direction (Ro) and an inward-radial direction (Ri) opposite to the outward-radial direction (Ro);
• the first blade bore (60) comprising:
• a first bore edge (62a) formed at an intersection of the first blade side surface (22) and the first blade bore (60);
• a second bore edge (62b) formed at an intersection of the second blade side surface (24) and the first blade bore (60);
• and
• a first bore peripheral surface (64) connecting the first and second bore edges (62a, 62b), and comprising:
• a first bore abutment sub-surface (66a) which conically tapers inwardly towards the first blade bore axis (B) from the first blade side surface (22);
• and
• an entry recess (68) in fluid connection with the first blade inlet (80a), the entry recess (68) being spaced apart from the first bore edge (62a) and recessed further than the first bore abutment sub-surface (66a) from the first blade bore axis (B);
• wherein:
• the entry recess (68) circumferentially extends only part-way along the first bore peripheral surface (64);
• the first bore abutment sub-surface (66a) comprises a first entry abutment sub-surface (70a) defined between the entry recess (68) and the first bore edge (62a), the first entry abutment sub-surface (70a) also conically tapering inwardly towards the first blade bore axis (B) from the first blade side surface (22);
• and
• in the outward-radial direction (Ro), a width of the first entry abutment sub-surface (70a) is smaller than a width of the first bore abutment sub-surface (66a) outside of the first entry abutment sub-surface (70a).