JPS6061110U - Drill structure - Google Patents

Drill structure

Info

Publication number
JPS6061110U
JPS6061110U JP15161483U JP15161483U JPS6061110U JP S6061110 U JPS6061110 U JP S6061110U JP 15161483 U JP15161483 U JP 15161483U JP 15161483 U JP15161483 U JP 15161483U JP S6061110 U JPS6061110 U JP S6061110U
Authority
JP
Japan
Prior art keywords
drill
drill structure
helix angle
tip
utility
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP15161483U
Other languages
Japanese (ja)
Inventor
二葉　邦彦
Original Assignee
シチズン時計株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by シチズン時計株式会社 filed Critical シチズン時計株式会社
Priority to JP15161483U priority Critical patent/JPS6061110U/en
Publication of JPS6061110U publication Critical patent/JPS6061110U/en
Pending legal-status Critical Current

Links

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は従来方式のドリルを示した平面図であり、第２
図は本考案である、ねじれ角が一定でないドリルの一実
施例を示した平面図である。 θ１・・・従来方式ドリルの先端部のねじれ角、θ２・
・・従来方式ドリルの溝切り終り部のねじれ角、Ａ・・
・従来方式ドリルの溝切り終り部、θ３・・・本実施例
によるドリルの先端部のねじれ角、θ、・・・本実施例
によるドリルの溝切り終り部のねじれ角、−Ｂ・・・本
実施例によるドリルの溝切り終り部、１，２・・・ドリ
ル。Figure 1 is a plan view showing a conventional drill;
The figure is a plan view showing an embodiment of the drill of the present invention, which has a non-uniform helix angle. θ1... Helix angle of the tip of the conventional drill, θ2.
・・Helix angle at the end of groove cutting of conventional drill, A...
・The groove cutting end of the conventional drill, θ3...The helix angle of the tip of the drill according to this embodiment, θ,...The helix angle of the groove cutting end of the drill according to this embodiment, -B... Grooving end portions of the drill according to this embodiment, 1, 2...Drill.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] ドリルの溝のねじれ角が、ドリルの先端から、ドリル保
持部にいくに従い、小さくなるように構成したことを特
徴とするドリル構造。A drill structure characterized in that the helix angle of the drill groove becomes smaller from the tip of the drill toward the drill holding part.
JP15161483U 1983-09-29 1983-09-29 Drill structure Pending JPS6061110U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15161483U JPS6061110U (en) 1983-09-29 1983-09-29 Drill structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15161483U JPS6061110U (en) 1983-09-29 1983-09-29 Drill structure

Publications (1)

Publication Number Publication Date
JPS6061110U true JPS6061110U (en) 1985-04-27

Family

ID=30335927

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15161483U Pending JPS6061110U (en) 1983-09-29 1983-09-29 Drill structure

Country Status (1)

Country Link
JP (1) JPS6061110U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03245908A (en) * 1990-02-20 1991-11-01 Hitachi Seiko Ltd Twist drill and manufacture thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03245908A (en) * 1990-02-20 1991-11-01 Hitachi Seiko Ltd Twist drill and manufacture thereof

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