JPS61164387U - - Google Patents

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Publication number
JPS61164387U
JPS61164387U JP4693885U JP4693885U JPS61164387U JP S61164387 U JPS61164387 U JP S61164387U JP 4693885 U JP4693885 U JP 4693885U JP 4693885 U JP4693885 U JP 4693885U JP S61164387 U JPS61164387 U JP S61164387U
Authority
JP
Japan
Prior art keywords
bit body
pilot part
bit
button
tip
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.)
Granted
Application number
JP4693885U
Other languages
English (en)
Other versions
JPH0242792Y2 (ja
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 JP1985046938U priority Critical patent/JPH0242792Y2/ja
Publication of JPS61164387U publication Critical patent/JPS61164387U/ja
Application granted granted Critical
Publication of JPH0242792Y2 publication Critical patent/JPH0242792Y2/ja
Expired legal-status Critical Current

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  • Earth Drilling (AREA)

Description

【図面の簡単な説明】
第１図〜第４図は、この考案の各実施例を示す
正面図である。 １，１１，２１，３１……ビツト本体、１ｃ…
…刃体、２，１２，２２，３２……パイロツト部
。

Claims (1)

    【実用新案登録請求の範囲】
  1. ボタン型の刃体を植設したビツト本体と、この
    ビツト本体の先端に延出させたパイロツト部とを
    一体に形成し、前記パイロツト部の軸方向の長さ
    を、ビツト本体の直径の約０．１５倍以上に設定
    してなることを特徴とするビツト。
JP1985046938U 1985-03-30 1985-03-30 Expired JPH0242792Y2 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1985046938U JPH0242792Y2 (ja) 1985-03-30 1985-03-30

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1985046938U JPH0242792Y2 (ja) 1985-03-30 1985-03-30

Publications (2)

Publication Number Publication Date
JPS61164387U true JPS61164387U (ja) 1986-10-11
JPH0242792Y2 JPH0242792Y2 (ja) 1990-11-14

Family

ID=30561801

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1985046938U Expired JPH0242792Y2 (ja) 1985-03-30 1985-03-30

Country Status (1)

Country Link
JP (1) JPH0242792Y2 (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009019463A (ja) * 2007-07-13 2009-01-29 Okumura Corp ガイドロッド付き穿孔装置

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58151407A (ja) * 1982-03-03 1983-09-08 Kawasaki Steel Corp 高炉出銑口座ぐり用ビツト

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58151407A (ja) * 1982-03-03 1983-09-08 Kawasaki Steel Corp 高炉出銑口座ぐり用ビツト

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009019463A (ja) * 2007-07-13 2009-01-29 Okumura Corp ガイドロッド付き穿孔装置

Also Published As

Publication number Publication date
JPH0242792Y2 (ja) 1990-11-14

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