Multiple-blade system as a turning tool for the cutting machining of workpieces

A turning tool for the cutting machining of workpieces and of the type to be mounted in a tool holder, comprising:

• a hollow sleeve of substantially rectangular cross-section and having oppositely disposed walls and opposite end portions;
• a clamping jaw releasably fitted in at least one of said end portions of said sleeve;
• a first cutting blade clamped between said releasably fitted jaw and one of said opposite walls;
• adjustable clamping screw means, threaded in threaded bores in the other of said opposite walls, for engaging said clamping jaw and causing the jaw to press said blade against said one wall;
• and
• at least a second cutting blade, which forms with said first blade a plurality of blades forming the actual tool, the cutting edges of said blades being displaced relative to each other by a predetermined amount so that the more forwardly projecting blade serves as a parting blade and the more inwardly disposed blade serves as a chamfering blade;
• the blades being of approximately trapezoidal cross-section so that the contact surface of one of the blades lies against the clamping jaw parallel to the longitudinal axis of the sleeve;
• the cross-section of the chamfering blade being narrower at the cutting side than at the opposite side and extending parallel thereto.