Cutting tool having a tool coupling with offset peripheral and central coupling threads and method of assembly thereof

A cutting tool (20), having a cutting portion (26), comprising:

• a first component (22) having a first component axis (A) and comprising:
• first peripheral and central coupling threads (32, 34), each extending in a helical direction about the first component axis (A), the first peripheral and central coupling threads (32, 34) being axially offset with respect to each other;
• and
• a first radial stop surface (40) located at the first peripheral coupling thread (32);
• and
• a second component (24) having a second component axis (B) and comprising:
• second peripheral and central coupling threads (36, 38), each extending in a helical direction about the second component axis (B), the second peripheral and central coupling threads (36, 38) being axially offset with respect to each other;
• and
• a second radial stop surface (42) located at the second peripheral coupling thread (36);
• wherein:
• the first and second peripheral coupling threads (32, 36) have a peripheral coupling thread pitch (PP);
• the first and second central coupling threads (34, 38) have a central coupling thread pitch (PC);
• the peripheral coupling thread pitch (Pp) is less than the central coupling thread pitch (PC);
• and
• the cutting tool (20) is adjustable between:
• an unassembled position in which:
• the first and second components are separated from one another, and
• an assembled position in which:
• the first and second radial stop surfaces (40, 42) abut each other;
• and
• the first peripheral and central coupling threads (32,34) threadingly engage the second peripheral and central coupling threads (36, 38), respectively.

A cutting tool (20), having a cutting portion (26), comprising:

• a first component (22) having a first component axis (A) and comprising:
• first peripheral and central coupling threads (32, 34), each extending in a helical direction about the first component axis (A), the first peripheral and central coupling threads (32, 34) being axially offset with respect to each other, the first central coupling thread (34) being a non-continuous thread formed on a female member (46);
• and
• a first radial stop surface (40) located at the first peripheral coupling thread (32);
• and
• a second component (24) having a second component axis (B) and comprising:
• second peripheral and central coupling threads (36, 38), each extending in a helical direction about the second component axis (B), the second peripheral and central coupling threads (36, 38) being axially offset with respect to each other, the second central coupling thread (38) being a non-continuous thread formed on a male member (58);
• and
• a second radial stop surface (42) located at the second peripheral coupling thread (36);
• wherein the first and second components (22, 24) are configured to permit insertion of the male member (58) into the female member (46), followed by a rotation of the first and second components (22, 24) relative to one another by no more than a total of 90° to have the first and second radial stop surfaces (40, 42) abut each other, during which rotation the first and second central coupling threads (34, 38) engage one another and, simultaneously, the first and second peripheral coupling threads (32, 36) engage one another.