GB137686A - A combination centre-drill - Google Patents

A combination centre-drill

Info

Publication number
GB137686A
GB137686A GB750919A GB750919A GB137686A GB 137686 A GB137686 A GB 137686A GB 750919 A GB750919 A GB 750919A GB 750919 A GB750919 A GB 750919A GB 137686 A GB137686 A GB 137686A
Authority
GB
United Kingdom
Prior art keywords
drill
cutter
holder
combination centre
combination
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
GB750919A
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.)
GEORGE PETLEY
Original Assignee
GEORGE PETLEY
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 GEORGE PETLEY filed Critical GEORGE PETLEY
Priority to GB750919A priority Critical patent/GB137686A/en
Publication of GB137686A publication Critical patent/GB137686A/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
    • B23B51/10—Bits for countersinking
    • B23B51/108—Bits for countersinking having a centering drill

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)

Abstract

137,686. Petley, G. March 26, 1919. No Patent granted (Sealing fee not paid). Drills.- Combination centre drills comprise a holder A drilled to suit a twist drill B and slotted to receive a countersinking - cutter C clamped in place by a nut D screwing on the holder and bored eccentrically at E to engage the cutter.
GB750919A 1919-03-26 1919-03-26 A combination centre-drill Expired GB137686A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB750919A GB137686A (en) 1919-03-26 1919-03-26 A combination centre-drill

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB750919A GB137686A (en) 1919-03-26 1919-03-26 A combination centre-drill

Publications (1)

Publication Number Publication Date
GB137686A true GB137686A (en) 1920-01-22

Family

ID=9834472

Family Applications (1)

Application Number Title Priority Date Filing Date
GB750919A Expired GB137686A (en) 1919-03-26 1919-03-26 A combination centre-drill

Country Status (1)

Country Link
GB (1) GB137686A (en)

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