JPH02114411U - - Google Patents

Info

Publication number
JPH02114411U
JPH02114411U JP2250189U JP2250189U JPH02114411U JP H02114411 U JPH02114411 U JP H02114411U JP 2250189 U JP2250189 U JP 2250189U JP 2250189 U JP2250189 U JP 2250189U JP H02114411 U JPH02114411 U JP H02114411U
Authority
JP
Japan
Prior art keywords
tool body
groove
wall surface
tip flank
protruding
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
JP2250189U
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 JP2250189U priority Critical patent/JPH02114411U/ja
Publication of JPH02114411U publication Critical patent/JPH02114411U/ja
Pending legal-status Critical Current

Links

Landscapes

  • Drilling Tools (AREA)

Description

【図面の簡単な説明】
第１図及び第２図は本考案の一実施例を示すも
ので、第１図は正面図、第２図は先端部の側面図
、第３図及び第４図は従来例を示す図で、第３図
は正面図、第４図は先端部の側面図、第５図及び
第６図は切屑排出性の改善を図つた従来例を示す
図で、第５図は正面図、第６図は先端部の側面図
である。 ２０……工具本体、２２……先端逃げ面、２３
……溝部、２４……溝部の壁面、２５……外切刃
、２６……内切刃、２８……突出壁、Ｐ０……工
具の回転中心。

Claims (1)

  1. 【実用新案登録請求の範囲】 工具本体の外周面に、該工具本体の先端逃げ面
    に開口する溝部が形成され、この溝部の回転方向
    を向く壁面と上記先端逃げ面との稜線部に切刃が
    形成されてなるガンドリルにおいて、 上記溝部壁面に、回転中心に向かうに従つて順
    次回転方向側に突出しかつ上記工具本体の半径方
    向に向かつて一直線状に延びる一以上の突出壁を
    形成したことを特徴とするガンドリル。
JP2250189U 1989-02-28 1989-02-28 Pending JPH02114411U (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2250189U JPH02114411U (ja) 1989-02-28 1989-02-28

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2250189U JPH02114411U (ja) 1989-02-28 1989-02-28

Publications (1)

Publication Number Publication Date
JPH02114411U true JPH02114411U (ja) 1990-09-13

Family

ID=31240677

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2250189U Pending JPH02114411U (ja) 1989-02-28 1989-02-28

Country Status (1)

Country Link
JP (1) JPH02114411U (ja)

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