DRILLING TOOL

A drilling tool is provided to make the shape simple, to make manufacturing and inspection easy, to bore a minute diameter hole and to prevent the breakage. A drilling tool comprises a first spiral fragment exhaust groove(1) and a second spiral fragment exhaust groove(2), land portion(3,4) installed...

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Hauptverfasser:	YAMAGA TAKUMA, KAZAMA YUSAKU, OUCHI KIYOAKI
Format:	Patent
Sprache:	eng
Schlagworte:	BORING MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR PERFORMING OPERATIONS TRANSPORTING TURNING
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creator	YAMAGA TAKUMA KAZAMA YUSAKU OUCHI KIYOAKI
description	A drilling tool is provided to make the shape simple, to make manufacturing and inspection easy, to bore a minute diameter hole and to prevent the breakage. A drilling tool comprises a first spiral fragment exhaust groove(1) and a second spiral fragment exhaust groove(2), land portion(3,4) installed between the spiral fragments exhaust grooves, an even front end surface(5) without the ridge intersecting with the tool central axis, crossing ridge parts(6, 7) with the spiral fragments exhaust groove(1) and the most protrusive part of the front end surface(5).
format	Patent
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subjects	BORING MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR PERFORMING OPERATIONS TRANSPORTING TURNING
title	DRILLING TOOL
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