Modular cutting tool having integral central pin and torque transfer mechanism

An elongated tool body (10) having a longitudinal body axis(S) defining opposite forward and rearward body directions (Bf, Br), the tool body (10) comprising:

• a body peripheral surface (22) extending about the longitudinal body axis(S);
• a rearwardly disposed rear body surface (34) circumferentially bounded by the body peripheral surface (22);
• a central body recess (36) recessed in the rear body surface (34), and comprising:
• an inner recess surface (38) located forwardly of the rear body surface (34);
• a body recess peripheral surface (42) extending between the inner recess surface (38) and the rear body surface (34);
• and
• a recess depth (Rd) measured along the longitudinal body axis(S) from the rear body surface (34) to the inner recess surface (38);
• and
• an integral central pin (50) monolithically formed with the rear body surface (34) and the central body recess (36), the integral central pin (50) comprising:
• a rear pin surface (52) located rearwardly of the inner recess surface (38) and delimiting the integral central pin (50) in the rearward body direction (Br);
• a peripheral pin surface (54) located between the inner recess surface (38) and the rear pin surface (52);
• and
• an integral pin length (Pi) measured along the longitudinal body axis(S) from the inner recess surface (38) to the rear pin surface (52);
• wherein:
• in a circumferential direction about the longitudinal body axis(S), the body recess peripheral surface (42) alternatingly increases and decreases in distance from the longitudinal body axis(S), thereby forming a plurality of angularly spaced apart longitudinal axis crests (46);
• and
• a minimal recess width (W) is measured as the minimal distance between the peripheral pin surface (54) and the plurality of longitudinal axis crests (46).