GB519475A - Improvements in and relating to drilling tools - Google Patents

Improvements in and relating to drilling tools

Info

Publication number
GB519475A
GB519475A GB30102/38A GB3010238A GB519475A GB 519475 A GB519475 A GB 519475A GB 30102/38 A GB30102/38 A GB 30102/38A GB 3010238 A GB3010238 A GB 3010238A GB 519475 A GB519475 A GB 519475A
Authority
GB
United Kingdom
Prior art keywords
drill
faces
sides
grooved
shank
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
GB30102/38A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB30102/38A priority Critical patent/GB519475A/en
Publication of GB519475A publication Critical patent/GB519475A/en
Expired 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B51/00—Tools for drilling machines
    • B23B51/009—Stepped drills
    • 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
    • B23B51/108—Bits for countersinking having a centering drill
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/26—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/62—Drill bits characterised by parts, e.g. cutting elements, which are detachable or adjustable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2251/00—Details of tools for drilling machines
    • B23B2251/48—Chip breakers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2251/00—Details of tools for drilling machines
    • B23B2251/50—Drilling tools comprising cutting inserts

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)

Abstract

519,475. Drills. FORSYTH, T. A. Oct. 18, 1938, No. 30102. [Class 83 (iii)] In a drill, particularly for drilling long holes, of the kind haying a stepped side or sides which are grooved to form cutting edges, the stepped faces 10 are cambered as at 11, towards their outer ends. The faces 4 of the steps are undercut and the leading edges 5, Fig. 4, are on a larger diameter than the trailing edges 6. The angle at the apex of the drill may be almost 50 degrees and the sides are grooved at 7 to provide cutting edges. The steps 10 &c. which are not symmetrical on opposite sides of the drill, slope downwardly and outwardly towards the base of the drill and the end faces may have unsymmetrical grooves 13. The side faces are parallel except near the apex where they converge as shown in Fig. 4. A drill 1 may be secured in a shank 14, as shown in Fig. 1, or additional side cutters 16, 17 may be attached by screws 18 as shown in Fig. 4, and in each case guides 15 are attached to the shank to engage the drilled hole. Specification 133,494, [Class 80 (iii)], is referred to.
GB30102/38A 1938-10-18 1938-10-18 Improvements in and relating to drilling tools Expired GB519475A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB30102/38A GB519475A (en) 1938-10-18 1938-10-18 Improvements in and relating to drilling tools

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB30102/38A GB519475A (en) 1938-10-18 1938-10-18 Improvements in and relating to drilling tools

Publications (1)

Publication Number Publication Date
GB519475A true GB519475A (en) 1940-03-28

Family

ID=10302300

Family Applications (1)

Application Number Title Priority Date Filing Date
GB30102/38A Expired GB519475A (en) 1938-10-18 1938-10-18 Improvements in and relating to drilling tools

Country Status (1)

Country Link
GB (1) GB519475A (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2504978A (en) * 1946-02-11 1950-04-25 Frederick E Henning Earth auger
JPS4820096U (en) * 1971-07-14 1973-03-07
US4189266A (en) * 1975-08-01 1980-02-19 George Koslow Rotary drill bit for hand-held power drills
GB2195564A (en) * 1986-10-11 1988-04-13 George Waddell Piloted drill tip
US5338135A (en) * 1991-04-11 1994-08-16 Sumitomo Electric Industries, Ltd. Drill and lock screw employed for fastening the same
US5918105A (en) 1994-12-12 1999-06-29 Black & Decker Inc. Cutting tools for drilling concrete, aggregate, masonry or the like materials
US6113321A (en) * 1995-07-29 2000-09-05 Black & Decker Inc. Roll-forged drill bit
US6174111B1 (en) 1994-12-12 2001-01-16 Black & Decker Inc. Cutting tools for drilling concrete, aggregate, masonry or the like materials
US6402448B1 (en) * 1997-04-15 2002-06-11 A-Z Ausrüstung und Zubehör GmbH & Co. Self-drilling and self-tapping screw
US20110116884A1 (en) * 2008-03-19 2011-05-19 Shiqing Li Helical bit tool

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2504978A (en) * 1946-02-11 1950-04-25 Frederick E Henning Earth auger
JPS4820096U (en) * 1971-07-14 1973-03-07
US4189266A (en) * 1975-08-01 1980-02-19 George Koslow Rotary drill bit for hand-held power drills
GB2195564A (en) * 1986-10-11 1988-04-13 George Waddell Piloted drill tip
GB2195564B (en) * 1986-10-11 1991-03-27 George Waddell Piloted drill bit.
US5338135A (en) * 1991-04-11 1994-08-16 Sumitomo Electric Industries, Ltd. Drill and lock screw employed for fastening the same
US5918105A (en) 1994-12-12 1999-06-29 Black & Decker Inc. Cutting tools for drilling concrete, aggregate, masonry or the like materials
US6174111B1 (en) 1994-12-12 2001-01-16 Black & Decker Inc. Cutting tools for drilling concrete, aggregate, masonry or the like materials
US6113321A (en) * 1995-07-29 2000-09-05 Black & Decker Inc. Roll-forged drill bit
US6402448B1 (en) * 1997-04-15 2002-06-11 A-Z Ausrüstung und Zubehör GmbH & Co. Self-drilling and self-tapping screw
US20110116884A1 (en) * 2008-03-19 2011-05-19 Shiqing Li Helical bit tool

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