JPH0379212U - - Google Patents

Info

Publication number
JPH0379212U
JPH0379212U JP13876389U JP13876389U JPH0379212U JP H0379212 U JPH0379212 U JP H0379212U JP 13876389 U JP13876389 U JP 13876389U JP 13876389 U JP13876389 U JP 13876389U JP H0379212 U JPH0379212 U JP H0379212U
Authority
JP
Japan
Prior art keywords
drill
grooves
torsion
depth
pair
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
JP13876389U
Other languages
English (en)
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 filed Critical
Priority to JP13876389U priority Critical patent/JPH0379212U/ja
Publication of JPH0379212U publication Critical patent/JPH0379212U/ja
Pending legal-status Critical Current

Links

Landscapes

  • Drilling Tools (AREA)

Description

【図面の簡単な説明】
第1図および第2図は、本考案ドリルの研削状
態の一実施例をそれぞれ示す説明図、第3図およ
び第4図は、ドリルの先端部および後端部におけ
る横断面の変化をそれぞれ示す一部拡大断面図で
ある。 1……ドリル、2……捩れ溝、3……砥石。

Claims (1)

    【実用新案登録請求の範囲】
  1. 1対の捩れ溝2,2を有するドリルにおいて、
    前記捩れ溝2,2は、一定のピツチおよび深さを
    有するとともに、その捩れ角および溝幅が先端部
    分からシヤンク側の後端部分に向つて順次大きく
    なるように変化していることを特徴とするドリル
JP13876389U 1989-11-30 1989-11-30 Pending JPH0379212U (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13876389U JPH0379212U (ja) 1989-11-30 1989-11-30

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13876389U JPH0379212U (ja) 1989-11-30 1989-11-30

Publications (1)

Publication Number Publication Date
JPH0379212U true JPH0379212U (ja) 1991-08-13

Family

ID=31685843

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13876389U Pending JPH0379212U (ja) 1989-11-30 1989-11-30

Country Status (1)

Country Link
JP (1) JPH0379212U (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020062735A (ja) * 2018-10-19 2020-04-23 松本 武雄 穴開け工具

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6135715B2 (ja) * 1977-02-02 1986-08-14 Hitachi Ltd
JPS62188614A (ja) * 1986-02-12 1987-08-18 Mitsubishi Metal Corp ドリル

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6135715B2 (ja) * 1977-02-02 1986-08-14 Hitachi Ltd
JPS62188614A (ja) * 1986-02-12 1987-08-18 Mitsubishi Metal Corp ドリル

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020062735A (ja) * 2018-10-19 2020-04-23 松本 武雄 穴開け工具

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