A machine tool assembly comprising: a basic body having a clamping axis (A C ) and an actuator movement axis (A M ), and comprising an insert holding arrangement , the actuator movement axis defining a forward engagement direction (D E ) and a rearward disengagement direction (D D ); a clamp mounted to the basic body, configured to move along the clamping axis relative to the basic body, and comprising a clamp ramping surface and a clamping surface ; and an actuator component mounted to the basic body and configured to move along the actuator movement axis; the actuator component comprising a rear first portion and a front second portion ; the front second portion being closer than the rear first portion to the clamp ramping surface and comprising: an actuator relief surface which is outwardly slanted relative to the rearward disengagement direction to thereby form an acute internal relief angle α with the actuator movement axis; and an actuator ramping surface connected at a discontinuity to the actuator relief surface and outwardly slanted relative to the rearward disengagement direction to thereby form an acute internal ramping angle β with the actuator movement axis, the ramping angle β being smaller than the relief angle α; wherein the machine tool assembly is adjustable between: an engagement position in which the actuator ramping surface abuts the clamp ramping surface, thereby biasing the clamp's clamping surface towards the insert holding arrangement; and a disengagement position in which the actuator relief surface is located closer than the actuator ramping surface to the clamp ramping surface. a basic body having a clamping axis (A C ) and an actuator movement axis (A M ), and comprising an insert holding arrangement , the actuator movement axis defining a forward engagement direction (D E ) and a rearward disengagement direction (D D ); a clamp mounted to the basic body, configured to move along the clamping axis relative to the basic body, and comprising a clamp ramping surface and a clamping surface ; and an actuator component mounted to the basic body and configured to move along the actuator movement axis; the actuator component comprising a rear first portion and a front second portion ; the front second portion being closer than the rear first portion to the clamp ramping surface and comprising: an actuator relief surface which is outwardly slanted relative to the rearward disengagement direction to thereby form an acute internal relief angle α with the actuator movement axis; and an actuator ramping surface connected at a discontinuity to the actuator relief surface and outwardly slanted relative to the rearward disengagement direction to thereby form an acute internal ramping angle β with the actuator movement axis, the ramping angle β being smaller than the relief angle α; wherein the machine tool assembly is adjustable between: an engagement position in which the actuator ramping surface abuts the clamp ramping surface, thereby biasing the clamp's clamping surface towards the insert holding arrangement; and a disengagement position in which the actuator relief surface is located closer than the actuator ramping surface to the clamp ramping surface. an engagement position in which the actuator ramping surface abuts the clamp ramping surface, thereby biasing the clamp's clamping surface towards the insert holding arrangement; and a disengagement position in which the actuator relief surface is located closer than the actuator ramping surface to the clamp ramping surface. <EOS>