Trepanning tool for use in drilling machine - consists of disc and ring with peripheral slots into which cutter bits are screwed and having central hole for guiding centre drill

摘要

The tool consists of a disc (1). It incorporates a strengthening rim (1a) and a central boss (2a) and a cutter support ring assembly. In the periphery of the disc and ring there are a number of vertical slots into which several cutter bits (5a,6a) can be screwed. In the central boss is a hole (3a) which can accommodate a centre drill which guides the tool. USE/ADVANTAGE - Simple trepanning tool for use in drilling machine.