JPS6144194B2 - - Google Patents

Info

Publication number
JPS6144194B2
JPS6144194B2 JP55057753A JP5775380A JPS6144194B2 JP S6144194 B2 JPS6144194 B2 JP S6144194B2 JP 55057753 A JP55057753 A JP 55057753A JP 5775380 A JP5775380 A JP 5775380A JP S6144194 B2 JPS6144194 B2 JP S6144194B2
Authority
JP
Japan
Prior art keywords
cutter
main
auxiliary
carbide tip
cutting edge
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.)
Expired
Application number
JP55057753A
Other languages
English (en)
Japanese (ja)
Other versions
JPS56156384A (en
Inventor
Yasuaki Ishikawa
Shuichi Ajiro
Masami Wada
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Construction Machinery Co Ltd
Original Assignee
Hitachi Construction Machinery Co Ltd
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 by Hitachi Construction Machinery Co Ltd filed Critical Hitachi Construction Machinery Co Ltd
Priority to JP5775380A priority Critical patent/JPS56156384A/ja
Publication of JPS56156384A publication Critical patent/JPS56156384A/ja
Publication of JPS6144194B2 publication Critical patent/JPS6144194B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Earth Drilling (AREA)
JP5775380A 1980-05-02 1980-05-02 Bit for vertical hole excavation Granted JPS56156384A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5775380A JPS56156384A (en) 1980-05-02 1980-05-02 Bit for vertical hole excavation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5775380A JPS56156384A (en) 1980-05-02 1980-05-02 Bit for vertical hole excavation

Publications (2)

Publication Number Publication Date
JPS56156384A JPS56156384A (en) 1981-12-03
JPS6144194B2 true JPS6144194B2 (enEXAMPLES) 1986-10-01

Family

ID=13064636

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5775380A Granted JPS56156384A (en) 1980-05-02 1980-05-02 Bit for vertical hole excavation

Country Status (1)

Country Link
JP (1) JPS56156384A (enEXAMPLES)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6216161B2 (ja) * 2013-06-07 2017-10-18 東日本旅客鉄道株式会社 ビット装置

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5317601U (enEXAMPLES) * 1976-07-26 1978-02-15
JPS54130705U (enEXAMPLES) * 1978-03-03 1979-09-11

Also Published As

Publication number Publication date
JPS56156384A (en) 1981-12-03

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