GB434703A - Improvements in or relating to twist drills and the like - Google Patents

Improvements in or relating to twist drills and the like

Info

Publication number
GB434703A
GB434703A GB1278035A GB1278035A GB434703A GB 434703 A GB434703 A GB 434703A GB 1278035 A GB1278035 A GB 1278035A GB 1278035 A GB1278035 A GB 1278035A GB 434703 A GB434703 A GB 434703A
Authority
GB
United Kingdom
Prior art keywords
drill
cutting edges
hollow
spring
van
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
GB1278035A
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.)
WILHELM JOHAN VAN VOSSEN
Original Assignee
WILHELM JOHAN VAN VOSSEN
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 BE409121D priority Critical patent/BE409121A/xx
Priority to FR789315D priority patent/FR789315A/en
Application filed by WILHELM JOHAN VAN VOSSEN filed Critical WILHELM JOHAN VAN VOSSEN
Priority to GB1278035A priority patent/GB434703A/en
Publication of GB434703A publication Critical patent/GB434703A/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
    • B23B51/04—Drills for trepanning
    • B23B51/0426—Drills for trepanning with centering devices
    • 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
    • B23B2251/20—Number of cutting edges
    • B23B2251/204—Four cutting edges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2251/00—Details of tools for drilling machines
    • B23B2251/60—Drills with pilots
    • B23B2251/603—Detachable pilots, e.g. in the form of a drill
    • B23B2251/606—Detachable pilots, e.g. in the form of a drill being a twist drill

Landscapes

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

Abstract

434,703. Hollow drills. VOSSEN, W. J. VAN, and ROBERTSON, C., 52, Laan van Heldenburg, Voorburg, Holland. April 29, 1935, No. 12780. [Class 83 (iii)] A hollow twist drill with a spring-controlled centre point is characterized in that the central bore of the drill is slightly tapered, the smaller diameter being at the cutting edges of the drill. The shank 3 provided with an oil conduit 19, is separate from and connected to the hollow drill 1 by interengaging teeth 4 and a screwed sleeve 2, the latter may be provided with a cup at its upper edge as an alternative means for supplying lubricant to the tool. The bore of the drill, which is slightly tapered, houses a spring-pressed centre 11 with an expansible sleeve support 13 having oil grooves, and adjustable axially to allow for grinding the cutting edges 5. The cutting edges may be inclined outwardly or inwardly, the former construction, Fig. 5, being particularly suitable for cutting holes in sheet material and in tubes.
GB1278035A 1935-04-29 1935-04-29 Improvements in or relating to twist drills and the like Expired GB434703A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
BE409121D BE409121A (en) 1935-04-29 1935-04-23
FR789315D FR789315A (en) 1935-04-29 1935-04-27 Spring center drill
GB1278035A GB434703A (en) 1935-04-29 1935-04-29 Improvements in or relating to twist drills and the like

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1278035A GB434703A (en) 1935-04-29 1935-04-29 Improvements in or relating to twist drills and the like

Publications (1)

Publication Number Publication Date
GB434703A true GB434703A (en) 1935-09-06

Family

ID=10010977

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1278035A Expired GB434703A (en) 1935-04-29 1935-04-29 Improvements in or relating to twist drills and the like

Country Status (3)

Country Link
BE (1) BE409121A (en)
FR (1) FR789315A (en)
GB (1) GB434703A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4113405A (en) * 1977-08-08 1978-09-12 Dillinger Lester L Apparatus for drilling or reaming
US4273117A (en) * 1978-09-02 1981-06-16 Neuhaeuser Hans G Apparatus for drilling bone

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4129400A (en) * 1975-11-26 1978-12-12 Wozar Tiberius Trepanning tool
DE4101678A1 (en) * 1991-01-22 1992-07-23 Manfred Rosenkranz Combined boring and centering tool - has one-piece shaft and flange whose shoulders act as frictional faces against chuck face and prevent tool slippage
DE9110056U1 (en) * 1991-08-14 1991-11-07 W + E Mueller Gmbh, 8531 Ipsheim, De

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4113405A (en) * 1977-08-08 1978-09-12 Dillinger Lester L Apparatus for drilling or reaming
US4273117A (en) * 1978-09-02 1981-06-16 Neuhaeuser Hans G Apparatus for drilling bone

Also Published As

Publication number Publication date
BE409121A (en) 1935-05-31
FR789315A (en) 1935-10-26

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