A cartridge for a cutting insert has a carrier, a rocker, which is attached to the carrier so as to be pivotable and has a seat for a cutting insert, and an adjusting element for adjusting the rocker relative to the carrier.

A holder for a cutting tool for processing of workpieces has a first part for holding a cutting tool (150), a second part (120) to which the first part is fastened, and a fastening element (140). An adjustment element adjusts the position of the first part in relation to the second part. The first and second parts have a first bore and a second bore for receiving the fastening element and a recess (118, 128) for receiving the adjustment element. The first part has an abutment surface (115) placed onto a contact surface (122) of the second part, such that the central axes (A-A) for the first and second bores become parallel. The abutment surface of the first part and the contact surface of the second part are inclined in relation to the feeding axis (G-G) of the work piece towards the cutting tool (150).

The present invention provides a rigid cartridge for multiple and universal application of all machining processes. The rigid cartridge includes a cylindrical body, a guiding and locating body connected to bottom side of cylindrical body, and a combination screw having a left hand [LH] thread and a right hand [RH] thread, wherein the cylindrical body includes a flat for locking the cartridge with the cutter body using locking screws, wherein the combination screw is connected to the bottom end of said guiding and locating body. The LH thread can be provided in cartridge side and RH thread can be provided in cutter body side or vice versa. In the cutter body or boring bar, a slot and/or approach hole can be provided in the cutter body for enabling to rotate the combination screw in clockwise or anti-clockwise direction to move the cartridge in forward and backward direction with respect to the cutter body.