Drill shape for chamfer

The utility model provides a chamfering cutter structure of a drill bit. The bottom end of the chamfering cutter part forms a tip shape, a fried dough twist-shaped hinge ring surface with a uniform external diameter is formed along the length shaping surface of the chamfering cutter part, one side e...

Ausführliche Beschreibung

Bibliographische Detailangaben

1. Verfasser:	LESHAN CHEN
Format:	Patent
Sprache:	eng
Schlagworte:	BORING MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR PERFORMING OPERATIONS TRANSPORTING TURNING
Online-Zugang:	Volltext bestellen
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