Drilling device for making holes with undercuttings.

摘要

2.1 Such a device consists of an adaptor, accommodating the drilling tool and connected to a drilling machine in such a way as to transmit torque, and of a bearing bush which is fastened in a holder of a column and in which a guide sleeve firmly connected to the drilling machine is accommodated and mounted in such a way as to be rotatable and pivotable via a pivot bearing. …2.2 In order to prolong the service lives of the drilling tools used for the drilling and undercutting, the adaptor consists of the drive part connected to the drilling machine in such a way as to transmit torque and of the tool holder accommodating the drilling tool. The positions of both parts can be mutually rotated and secured in such a way as to transmit torque. Furthermore, the centre axis of the tool holder is angled relative to the drive-part centre axis in alignment with the drive axis of the drilling machine. … …