JPH01125111U - - Google Patents

Info

Publication number
JPH01125111U
JPH01125111U JP1987888U JP1987888U JPH01125111U JP H01125111 U JPH01125111 U JP H01125111U JP 1987888 U JP1987888 U JP 1987888U JP 1987888 U JP1987888 U JP 1987888U JP H01125111 U JPH01125111 U JP H01125111U
Authority
JP
Japan
Prior art keywords
cutting blades
pair
outer circumferential
cylindrical part
circumferential surface
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
JP1987888U
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 JP1987888U priority Critical patent/JPH01125111U/ja
Publication of JPH01125111U publication Critical patent/JPH01125111U/ja
Pending legal-status Critical Current

Links

Landscapes

  • Drilling Tools (AREA)

Description

【図面の簡単な説明】
第1図は本考案に係るドリルの一実施例を示す
斜視図、第2図は第1図の正面図、第3図及び第
4図はそれぞれ第2図のA―A線及びB―B線断
面図、第5図は本実施例のドリルにより加工され
るポーラス管を示す斜視図、第6図はポーラス管
の使用例を示す縦断面図である。 5……ドリル、6……第1の円柱部、6a……
端面、7……逃げ部、8……第2の円柱部、14
……第1の切削刃、15……第2の切削刃。

Claims (1)

    【実用新案登録請求の範囲】
  1. 先端に円錐状の端面を有する第1の円柱部の、
    該端面の直径方向及び外周面のほぼ軸方向に、そ
    れぞれ中心軸に対して対称的に延設して設けられ
    た1対の第1の切削刃と、該第1の円柱部より僅
    かに大きい直径の第2の円柱部の外周面に、前記
    1対の第1の切削刃の延長線上にそれぞれ設けら
    れた第2の切削刃とを具備したことを特徴とする
    ドリル。
JP1987888U 1988-02-19 1988-02-19 Pending JPH01125111U (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1987888U JPH01125111U (ja) 1988-02-19 1988-02-19

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1987888U JPH01125111U (ja) 1988-02-19 1988-02-19

Publications (1)

Publication Number Publication Date
JPH01125111U true JPH01125111U (ja) 1989-08-25

Family

ID=31235778

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1987888U Pending JPH01125111U (ja) 1988-02-19 1988-02-19

Country Status (1)

Country Link
JP (1) JPH01125111U (ja)

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