JPS5237283A - Chamfering drill - Google Patents

Chamfering drill

Info

Publication number
JPS5237283A
JPS5237283A JP11391975A JP11391975A JPS5237283A JP S5237283 A JPS5237283 A JP S5237283A JP 11391975 A JP11391975 A JP 11391975A JP 11391975 A JP11391975 A JP 11391975A JP S5237283 A JPS5237283 A JP S5237283A
Authority
JP
Japan
Prior art keywords
chamfering drill
chamfering
drill
craze
utilizing
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
JP11391975A
Other languages
Japanese (ja)
Inventor
Tsutomu Naito
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.)
NAITO KOKI SEISAKUSHO KK
NAITO KOUKI SEISAKUSHIYO KK
NAITOU KOUKI SEISAKUSHIYO KK
Original Assignee
NAITO KOKI SEISAKUSHO KK
NAITO KOUKI SEISAKUSHIYO KK
NAITOU KOUKI SEISAKUSHIYO 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 NAITO KOKI SEISAKUSHO KK, NAITO KOUKI SEISAKUSHIYO KK, NAITOU KOUKI SEISAKUSHIYO KK filed Critical NAITO KOKI SEISAKUSHO KK
Priority to JP11391975A priority Critical patent/JPS5237283A/en
Publication of JPS5237283A publication Critical patent/JPS5237283A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B51/00—Tools for drilling machines
    • B23B51/10—Bits for countersinking

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Drilling Tools (AREA)

Abstract

PURPOSE:To prevent the development of craze by utilizing a conical guide surface.
JP11391975A 1975-09-18 1975-09-18 Chamfering drill Pending JPS5237283A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11391975A JPS5237283A (en) 1975-09-18 1975-09-18 Chamfering drill

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11391975A JPS5237283A (en) 1975-09-18 1975-09-18 Chamfering drill

Publications (1)

Publication Number Publication Date
JPS5237283A true JPS5237283A (en) 1977-03-23

Family

ID=14624466

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11391975A Pending JPS5237283A (en) 1975-09-18 1975-09-18 Chamfering drill

Country Status (1)

Country Link
JP (1) JPS5237283A (en)

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