Search International and National Patent Collections

1. (WO2017034032) THREE-BLADE DRILL

Pub. No.:    WO/2017/034032    International Application No.:    PCT/JP2016/075086
Publication Date: Fri Mar 03 00:59:59 CET 2017 International Filing Date: Sat Aug 27 01:59:59 CEST 2016
IPC: B23B 51/00
B23B 51/02
Applicants: BIC TOOL CO., LTD.
株式会社ビック・ツール
Inventors: ARAI Koichi
新井 高一
ARAI Giichi
新井 義一
KIMURA Katsuyo
木村 勝世
TESHIMA Satoshi
手嶋 智
Title: THREE-BLADE DRILL
Abstract:
[Problem] To provide a three-blade drill having cutting edges which do not slip easily and have small cutting resistance. [Solution] Provided is a three-blade drill having three thinning cutting edges, the three-blade drill being characterized in that one or two of the thinning cutting edges pass through a rotational center C of the tip of the cutting edges of the three-blade drill, and the remaining one or two thinning cutting edges do not cover the rotational center C.