JPH0362715U - - Google Patents

Info

Publication number
JPH0362715U
JPH0362715U JP12371589U JP12371589U JPH0362715U JP H0362715 U JPH0362715 U JP H0362715U JP 12371589 U JP12371589 U JP 12371589U JP 12371589 U JP12371589 U JP 12371589U JP H0362715 U JPH0362715 U JP H0362715U
Authority
JP
Japan
Prior art keywords
drill
pair
groove bottom
twist
land portion
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
JP12371589U
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 JP12371589U priority Critical patent/JPH0362715U/ja
Publication of JPH0362715U publication Critical patent/JPH0362715U/ja
Pending legal-status Critical Current

Links

Description

【図面の簡単な説明】
図面は本考案の実施例と従来例を示すもので、
第1図は本考案のツイストドリルの正面図、第2
図はその側面図、第3,4図は切屑が分断される
状態を示す側面図、第5図は従来のツイストドリ
ルの正面図、第6図はその側面図である。 1……ドリル本体、2……切刃、3……ねじれ
溝、3a……ねじれ溝底、4……ランド部、5…
…ヒール部、6……凸弧面。

Claims (1)

    【実用新案登録請求の範囲】
  1. 一対の切刃2,2と一対のねじれ溝3,3及び
    ランド部4,4からなるツイストドリルにおいて
    、ねじれ溝底3aの曲率をドリル直径の略々1/10
    R程度とし、該溝底3aの円弧状部が平面視にお
    いて水平軸線Y−Yに接するように形成されると
    共にランド部4のヒール部5を凸弧面6に形成し
    たことを特徴とするツイストドリル。
JP12371589U 1989-10-23 1989-10-23 Pending JPH0362715U (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12371589U JPH0362715U (ja) 1989-10-23 1989-10-23

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12371589U JPH0362715U (ja) 1989-10-23 1989-10-23

Publications (1)

Publication Number Publication Date
JPH0362715U true JPH0362715U (ja) 1991-06-19

Family

ID=31671681

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12371589U Pending JPH0362715U (ja) 1989-10-23 1989-10-23

Country Status (1)

Country Link
JP (1) JPH0362715U (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7137462B2 (en) 2002-11-01 2006-11-21 Kabushiki Kaisha Miyanaga Drill bit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7137462B2 (en) 2002-11-01 2006-11-21 Kabushiki Kaisha Miyanaga Drill bit

Similar Documents

Publication Publication Date Title
JPS6446116U (ja)
JPH0362715U (ja)
JPH02114417U (ja)
JPH01138602U (ja)
JPH0259904U (ja)
JPH03100019U (ja)
JPS61141007U (ja)
JPS6299693U (ja)
JPS6347814U (ja)
JPS6285323U (ja)
JPH0331866U (ja)
JPS62155875U (ja)
JPH0263911U (ja)
JPH0223570U (ja)
JPH02139996U (ja)
JPH0368806U (ja)
JPS62148172U (ja)
JPH01145305U (ja)
JPH0251070U (ja)
JPS6420211U (ja)
JPS6410510U (ja)
JPH0379202U (ja)
JPS6389413U (ja)
JPH0184917U (ja)
JPH01114216U (ja)