KR900009190A - Twist drill - Google Patents

Twist drill

Info

Publication number
KR900009190A
KR900009190A KR1019880016976A KR880016976A KR900009190A KR 900009190 A KR900009190 A KR 900009190A KR 1019880016976 A KR1019880016976 A KR 1019880016976A KR 880016976 A KR880016976 A KR 880016976A KR 900009190 A KR900009190 A KR 900009190A
Authority
KR
South Korea
Prior art keywords
twist drill
twist
drill
Prior art date
Application number
KR1019880016976A
Other languages
Korean (ko)
Other versions
KR940011216B1 (en
Inventor
고오지로오 이마나가
신이찌 나카무라
히데지 호소노
요시유끼 야나세
Original Assignee
미쓰비시 마테리알 가부시기가이샤
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
Priority claimed from JP20585988A external-priority patent/JP2674124B2/en
Application filed by 미쓰비시 마테리알 가부시기가이샤 filed Critical 미쓰비시 마테리알 가부시기가이샤
Publication of KR900009190A publication Critical patent/KR900009190A/en
Application granted granted Critical
Publication of KR940011216B1 publication Critical patent/KR940011216B1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B51/00—Tools for drilling machines
    • B23B51/02—Twist drills
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2228/00—Properties of materials of tools or workpieces, materials of tools or workpieces applied in a specific manner
    • B23B2228/10—Coatings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2251/00—Details of tools for drilling machines
    • B23B2251/04—Angles, e.g. cutting angles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2251/00—Details of tools for drilling machines
    • B23B2251/18—Configuration of the drill point
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2251/00—Details of tools for drilling machines
    • B23B2251/24—Overall form of drilling tools
    • B23B2251/241—Cross sections of the diameter of the drill

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Drilling Tools (AREA)
KR1019880016976A 1988-08-19 1988-12-19 Twist drill KR940011216B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20585988A JP2674124B2 (en) 1987-12-14 1988-08-19 Twist drill

Publications (2)

Publication Number Publication Date
KR900009190A true KR900009190A (en) 1990-07-02
KR940011216B1 KR940011216B1 (en) 1994-11-29

Family

ID=16513897

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019880016976A KR940011216B1 (en) 1988-08-19 1988-12-19 Twist drill

Country Status (1)

Country Link
KR (1) KR940011216B1 (en)

Also Published As

Publication number Publication date
KR940011216B1 (en) 1994-11-29

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Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
G160 Decision to publish patent application
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 20081027

Year of fee payment: 15

EXPY Expiration of term