Gewindeschneidende Schraube

摘要

The screw core (1) has a screw-in longitudinal direction (23) and a screw-in rotary direction. The thread (6) is integral with the core and an insertion end (2), with a cutting section (16) situated near the insertion end which contains cutting-notches defining cutting-teeth opening towards the outer periphery of the thread. The cutting notches, in relation to the screw-in longitudinal direction and turning direction, each form a thread-like duct with pitch of between 60 - 80 degrees .