Replaceable cutting head, tool holder and morse taper rotary cutting tool having fastening member

A replaceable cutting head (22), for rotary cutting operations, having a head longitudinal axis (A), defining opposite forward and rearward directions (DF, DR), and opposite rotationally forward and rearward directions (RF, RR) with the rotationally forward direction (RF) being the cutting direction, the replaceable cutting head (22) comprising:

• a forward portion forming a cutting portion (26) and a rearward portion forming a mounting portion (28);
• and
• opposite head forward and rearward surfaces (56, 58) and a head peripheral surface (60) extending therebetween, the head forward surface (56) being located at the cutting portion (26) and the head rear surface (58) being located at the mounting portion (28);
• a head through hole (42) comprising a through hole peripheral surface (44) which extends about a through hole central axis (E), and intersects the head forward and rearward surfaces (56, 58);
• wherein:
• the mounting portion (28) comprises a male coupling member (38) protruding rearwardly from a head base surface (40), the head base surface (40) extending transversely with respect to the head longitudinal axis (A), and defining a boundary between the cutting portion (26) and the mounting portion (28);
• and
• the male coupling member (38) comprises a conically shaped head abutment surface (54), the head abutment surface (54) tapering inwardly in the rearward direction (DR) at a head cone angle (2α) in the range of 2.8°≤2α≤3.16°, the head abutment surface (54) having a head cone height (H1) measured in a direction along the head longitudinal axis (A) and a maximum head cone diameter (Dmax), the head cone height (H1) greater than the maximum head cone diameter (Dmax), the male coupling member (38) configured for a Morse taper coupling mechanism.