A guide bush adjusting device includes a drawbar (a mobile body) displaceable relative to a guide bush sleeve (cylindrical body). The drawbar is formed from a screw connection member (a connection member) which is connected to a guide bush housed in the guide bush sleeve (a cylindrical body), and an operation member configured to displace the screw connection member. The guide bush adjusting device adjusts an inner diameter of the guide bush by releasing the operation member from its fixation, displacing the drawbar, moving the guide bush with respect to the guide bush sleeve via the drawbar to thereby position the guide bush, and fixing the operation member of the drawbar (mobile body) at a predetermined position.

A curtain assembly comprises a rotatable drive element wherein at least one helical guide structure is formed on, or into, the outer surface of the drive element. A drive attachment element having a structure that communicates with the helical guide structure to move the drive attachment element axially along the drive element when the drive element is rotated. Specific embodiments incorporate either a manual or motor-driven rotation assembly for rotating the drive element. Further specific embodiments involve a helical guide structure that comprises a helical groove and a structure that comprises a tooth that engages with the helical groove.

A curtain assembly comprises a rotatable drive element wherein at least one helical guide structure is formed on, or into, the outer surface of the drive element. A drive attachment element having a structure that communicates with the helical guide structure to move the drive attachment element axially along the drive element when the drive element is rotated. Specific embodiments incorporate either a manual or motor-driven rotation assembly for rotating the drive element. Further specific embodiments involve a helical guide structure that comprises a helical groove and a structure that comprises a tooth that engages with the helical groove.

A method for producing a metal cutting tool component and a metal cutting tool component. The method includes the step of producing a front module having a main body and a front module interface at a rear end thereof, providing an intermediate element and building, using an additive manufacturing process, the main body on the build surface of the intermediate element. Further, a rear module including a coupling part at a rear end thereof and a rear module interface at a front end thereof is provided, and mounting the front module on the rear module by immovably connecting the front module and rear module interfaces, after the front module has been mounted on the rear module, machining at least one surface of the main body, and heat treating the intermediate element with the built main body, wherein at least the main body is hardened.

A method for producing a metal cutting tool component and a metal cutting tool component. The method includes the step of producing a front module having a main body and a front module interface at a rear end thereof, providing an intermediate element and building, using an additive manufacturing process, the main body on the build surface of the intermediate element. Further, a rear module including a coupling part at a rear end thereof and a rear module interface at a front end thereof is provided, and mounting the front module on the rear module by immovably connecting the front module and rear module interfaces, after the front module has been mounted on the rear module, machining at least one surface of the main body, and heat treating the intermediate element with the built main body, wherein at least the main body is hardened.