GB471709A - Improvements in and relating to twist drills - Google Patents

Improvements in and relating to twist drills

Info

Publication number
GB471709A
GB471709A GB3217736A GB3217736A GB471709A GB 471709 A GB471709 A GB 471709A GB 3217736 A GB3217736 A GB 3217736A GB 3217736 A GB3217736 A GB 3217736A GB 471709 A GB471709 A GB 471709A
Authority
GB
United Kingdom
Prior art keywords
grooves
flute
relating
twist drills
sides
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
GB3217736A
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
Priority to BE424785D priority Critical patent/BE424785A/xx
Application filed by Individual filed Critical Individual
Priority to GB3217736A priority patent/GB471709A/en
Publication of GB471709A publication Critical patent/GB471709A/en
Priority to FR829126D priority patent/FR829126A/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
    • B23B51/02—Twist drills
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2251/00—Details of tools for drilling machines
    • B23B2251/08—Side or plan views of cutting edges
    • B23B2251/087—Cutting edges with a wave form
    • 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
    • B23B2251/40—Flutes, i.e. chip conveying grooves
    • B23B2251/406—Flutes, i.e. chip conveying grooves of special form not otherwise provided for
    • 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

Landscapes

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

Abstract

471,709. Twist drills. SHINER, A. E. Nov. 24, 1936, No. 32177. [Class 83 (iii)] In a twist drill of the kind having auxiliary grooves in the main flutes 1 which intersect the straight cutting lips 3 to make them discontinuous, the auxiliary grooves 2 are of dihedral form and increase in depth towards the axis of the drill, the sides 4 being tangentially arranged and the sides 5 at an acute angle thereto. One or more grooves 2 may be provided in each flute 1, and the highest points 6 between the grooves lie in the general surface of the flute.
GB3217736A 1936-11-24 1936-11-24 Improvements in and relating to twist drills Expired GB471709A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
BE424785D BE424785A (en) 1936-11-24
GB3217736A GB471709A (en) 1936-11-24 1936-11-24 Improvements in and relating to twist drills
FR829126D FR829126A (en) 1936-11-24 1937-11-16 Twist drill

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3217736A GB471709A (en) 1936-11-24 1936-11-24 Improvements in and relating to twist drills

Publications (1)

Publication Number Publication Date
GB471709A true GB471709A (en) 1937-09-09

Family

ID=10334487

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3217736A Expired GB471709A (en) 1936-11-24 1936-11-24 Improvements in and relating to twist drills

Country Status (3)

Country Link
BE (1) BE424785A (en)
FR (1) FR829126A (en)
GB (1) GB471709A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2201910A (en) * 1987-02-23 1988-09-14 Joseph Spencer Drilling bit
DE3730378A1 (en) * 1987-09-10 1989-03-23 Micro Crystal Ag CUTTING TOOL, ESPECIALLY DRILLING AND / OR MILLING
CN101856737A (en) * 2009-04-07 2010-10-13 山特维克知识产权股份有限公司 Solid step drill

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2201910A (en) * 1987-02-23 1988-09-14 Joseph Spencer Drilling bit
DE3730378A1 (en) * 1987-09-10 1989-03-23 Micro Crystal Ag CUTTING TOOL, ESPECIALLY DRILLING AND / OR MILLING
CN101856737A (en) * 2009-04-07 2010-10-13 山特维克知识产权股份有限公司 Solid step drill

Also Published As

Publication number Publication date
BE424785A (en)
FR829126A (en) 1938-06-13

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