A cutting tool, having a cutting portion, comprising: a first component having a first component axis and comprising: a helical first coupling end surface and a first central coupling thread extending in a helical direction about the first component axis, the first coupling end surface and first central coupling thread being axially offset with respect to each other; and a first radial stop surface located at the first coupling end surface; and a second component having a second component axis and comprising: a helical second coupling end surface and a second central coupling thread extending in a helical direction about the second component axis, the second coupling end surface and second central coupling thread being axially offset with respect to each other; and a second radial stop surface located at the second coupling end surface; wherein the first and second coupling end surfaces (28, 52) have a peripheral coupling thread pitch (P P); and the first and second central coupling threads (34, 38) have a central coupling thread pitch (P C); the peripheral coupling thread pitch (P P) being less than the central coupling thread pitch (P C); characterized in that the cutting tool 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; wherein the first coupling end surface abuts the second coupling end surface; and the first central coupling thread threadingly engages the second central coupling thread so that a differential tool coupling is formed between the first and second components (22, 24). a helical first coupling end surface and a first central coupling thread extending in a helical direction about the first component axis, the first coupling end surface and first central coupling thread being axially offset with respect to each other; and a first radial stop surface located at the first coupling end surface; and a second component having a second component axis and comprising: a helical second coupling end surface and a second central coupling thread extending in a helical direction about the second component axis, the second coupling end surface and second central coupling thread being axially offset with respect to each other; and a second radial stop surface located at the second coupling end surface; wherein the first and second coupling end surfaces (28, 52) have a peripheral coupling thread pitch (P P); and the first and second central coupling threads (34, 38) have a central coupling thread pitch (P C); the peripheral coupling thread pitch (P P) being less than the central coupling thread pitch (P C); characterized in that the cutting tool 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; wherein the first coupling end surface abuts the second coupling end surface; and the first central coupling thread threadingly engages the second central coupling thread so that a differential tool coupling is formed between the first and second components (22, 24). a helical second coupling end surface and a second central coupling thread extending in a helical direction about the second component axis, the second coupling end surface and second central coupling thread being axially offset with respect to each other; and a second radial stop surface located at the second coupling end surface; wherein the first and second coupling end surfaces (28, 52) have a peripheral coupling thread pitch (P P); and the first and second central coupling threads (34, 38) have a central coupling thread pitch (P C); the peripheral coupling thread pitch (P P) being less than the central coupling thread pitch (P C); characterized in that the cutting tool 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; wherein the first coupling end surface abuts the second coupling end surface; and the first central coupling thread threadingly engages the second central coupling thread so that a differential tool coupling is formed between the first and second components (22, 24). the first and second radial stop surfaces (40, 42) abut each other; wherein the first coupling end surface abuts the second coupling end surface; and the first central coupling thread threadingly engages the second central coupling thread so that a differential tool coupling is formed between the first and second components (22, 24).