JPS57163006A - Core drill - Google Patents

Core drill

Info

Publication number
JPS57163006A
JPS57163006A JP4703281A JP4703281A JPS57163006A JP S57163006 A JPS57163006 A JP S57163006A JP 4703281 A JP4703281 A JP 4703281A JP 4703281 A JP4703281 A JP 4703281A JP S57163006 A JPS57163006 A JP S57163006A
Authority
JP
Japan
Prior art keywords
shank
screwed
screw portion
drill
center drill
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
JP4703281A
Other languages
Japanese (ja)
Inventor
Yoshinori Yasumi
Morimasa Okada
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.)
Unika Co Ltd
Original Assignee
Unika 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 Unika Co Ltd filed Critical Unika Co Ltd
Priority to JP4703281A priority Critical patent/JPS57163006A/en
Publication of JPS57163006A publication Critical patent/JPS57163006A/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
    • B23B51/04—Drills for trepanning
    • B23B51/0426—Drills for trepanning with centering devices

Landscapes

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

Abstract

PURPOSE:To facilitate the processes of connecting together a shank and a center drill in a core drill and automatically centering the center drill, by connecting the shank and the center dril by screws. CONSTITUTION:A male screw portion 45 on which a cylindrical cutting tool is screwed in is formed on the periphery of a shank 30 in such a way as the cutting tool may be tightened more as the received cutting force increases, and a female screw portion 42 and an inner bottom portion 44 are formed on the inner periphery of the shank 30. A male screw portion 40 which is to be screwed in the female screw portion of the shank 30, a portion 38 not threaded and a tapered portion 36 are formed on the base end portion of a center drill 32. When the center drill 32 is screwed in the shank 30, the tapered portion 36 is positioned in the inner bottom portion 44, and its centering is achieved automatically.
JP4703281A 1981-03-30 1981-03-30 Core drill Pending JPS57163006A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4703281A JPS57163006A (en) 1981-03-30 1981-03-30 Core drill

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4703281A JPS57163006A (en) 1981-03-30 1981-03-30 Core drill

Publications (1)

Publication Number Publication Date
JPS57163006A true JPS57163006A (en) 1982-10-07

Family

ID=12763830

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4703281A Pending JPS57163006A (en) 1981-03-30 1981-03-30 Core drill

Country Status (1)

Country Link
JP (1) JPS57163006A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4777725A (en) * 1985-06-05 1988-10-18 Noga Engineering Ltd. Blade holder capable of holding two different deburring blades and a deburring tool utilizing same
US4968189A (en) * 1989-10-20 1990-11-06 Pidgeon Joseph A Hole saw driver-extruder and hole enlarger
US7001116B2 (en) * 2003-03-29 2006-02-21 Eazypower Corporation Workpiece removal device for a hole saw
US7766583B2 (en) 2003-03-29 2010-08-03 Eazypower Corporation Workpiece removal device for a hole saw and plug cutter

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4777725A (en) * 1985-06-05 1988-10-18 Noga Engineering Ltd. Blade holder capable of holding two different deburring blades and a deburring tool utilizing same
US4968189A (en) * 1989-10-20 1990-11-06 Pidgeon Joseph A Hole saw driver-extruder and hole enlarger
US7001116B2 (en) * 2003-03-29 2006-02-21 Eazypower Corporation Workpiece removal device for a hole saw
US7766583B2 (en) 2003-03-29 2010-08-03 Eazypower Corporation Workpiece removal device for a hole saw and plug cutter

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