JPH0133631B2 - - Google Patents

Info

Publication number
JPH0133631B2
JPH0133631B2 JP59257975A JP25797584A JPH0133631B2 JP H0133631 B2 JPH0133631 B2 JP H0133631B2 JP 59257975 A JP59257975 A JP 59257975A JP 25797584 A JP25797584 A JP 25797584A JP H0133631 B2 JPH0133631 B2 JP H0133631B2
Authority
JP
Japan
Prior art keywords
main body
hole
cutting blade
center
wedge
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
JP59257975A
Other languages
English (en)
Japanese (ja)
Other versions
JPS61134490A (ja
Inventor
Masaaki Myanaga
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.)
Myanaga KK
Original Assignee
Myanaga KK
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 Myanaga KK filed Critical Myanaga KK
Priority to JP25797584A priority Critical patent/JPS61134490A/ja
Publication of JPS61134490A publication Critical patent/JPS61134490A/ja
Publication of JPH0133631B2 publication Critical patent/JPH0133631B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Earth Drilling (AREA)
JP25797584A 1984-12-05 1984-12-05 拡径孔部削成装置 Granted JPS61134490A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP25797584A JPS61134490A (ja) 1984-12-05 1984-12-05 拡径孔部削成装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP25797584A JPS61134490A (ja) 1984-12-05 1984-12-05 拡径孔部削成装置

Publications (2)

Publication Number Publication Date
JPS61134490A JPS61134490A (ja) 1986-06-21
JPH0133631B2 true JPH0133631B2 (enrdf_load_stackoverflow) 1989-07-14

Family

ID=17313802

Family Applications (1)

Application Number Title Priority Date Filing Date
JP25797584A Granted JPS61134490A (ja) 1984-12-05 1984-12-05 拡径孔部削成装置

Country Status (1)

Country Link
JP (1) JPS61134490A (enrdf_load_stackoverflow)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014129119A1 (ja) * 2013-02-19 2014-08-28 Ｆｓテクニカル株式会社 拡径用ドリルビット

Also Published As

Publication number Publication date
JPS61134490A (ja) 1986-06-21

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Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees