| 摘要 |
A thread-cutting head for pipes, tubes, and the like, with cutting jaws arranged in a cutting-jaw holder. The cutting jaws are radially adjustable by a control disc which is displaceably supported on the cutting-jaw holder and is adjustable by a clamping screw. The control disc for the cutting position of the cutting jaws relative to the cutting jaw holder is adapted to be tensioned and arrested against the force of a spring. The thead-cutting head also has a clamping lever as well as an unlatching abutment projecting into the thread-cutting range. The clamping lever is pivotally journaled on an arresting piece arranged on the control disc about a pivot pin directed transverse to the thread-cutting axis. A catch member is arranged between the cutting-jaw holder and the arresting piece. The clamping lever has a release pin directed against the catch member, and is embodied as an unlatching abutment at that end thereof directed toward the cutting jaw side. The clamping lever may have an additional pivot pin bore, the distance of which to the unlatching abutment of the clamping lever is less than the distance between the pivot pin and the greatest possible thread-cutting diameter of the cutting jaw. |
