GB252618A - Screw thread cutting tool - Google Patents

Screw thread cutting tool

Info

Publication number
GB252618A
GB252618A GB2785625A GB2785625A GB252618A GB 252618 A GB252618 A GB 252618A GB 2785625 A GB2785625 A GB 2785625A GB 2785625 A GB2785625 A GB 2785625A GB 252618 A GB252618 A GB 252618A
Authority
GB
United Kingdom
Prior art keywords
teeth
cutting
edges
thread
series
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
GB2785625A
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 GB2785625A priority Critical patent/GB252618A/en
Publication of GB252618A publication Critical patent/GB252618A/en
Expired legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23GTHREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH
    • B23G5/00Thread-cutting tools; Die-heads

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gear Processing (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
  • Milling, Broaching, Filing, Reaming, And Others (AREA)

Abstract

252,618. Baumann, E., and Strasmann, A. Nov. 5,1925. Screwing-dies; ta;ps.-In screw-cutting tools of the kind having longitudinal series of teeth provided with lateral and transverse cutting-edges, the edges of the teeth in relatively adjacent series being oppositely located, the lateral edges conform in shape to the flanks of the thread to be cut and the transverse edges form an acute angle with the axis of the tool. As applied to taps, the teeth which perform the preliminary cutting of the thread are formed with oblique transverse cutting-edges 1a, Fig. 1, the direction of obliquity being opposite in succeeding teeth. The opposite lateral edges may be removed alternately in succeeding teeth as at 3. so that each tooth removes a rough cutting a, Fig. 5, and also a fine cutting b. Alternatively, one cutting-edge may coincide with the flank of the thread itself as in Fig. 15. In the case of taps the lowest points 33 of the cutting-edges lie within the core diameter of the thread and in cutters for external threads they lie outside the largest diameter of the thread so as to true the work to the correct size for the shaping-cutters. For cutting square or trapezoidal threads the taps are constructed as shown in Figs. 7 and 11 respectively, the lateral edges 37, 38 being left full and removed slightly in alternate series of teeth so as to produce rough and fine cutting as shown in Figs. 10 and 14. The cuttings 28, 28<1>, Fig. 10, are produced by each of the teeth 34, Fig. 7, while the cuttings 27, 27<1> are produced by each of the teeth in the succeeding series. Similarly, the teeth 40, Fig. 11, produce cuttings 30, 30<1>, Fig. 14, while the teeth in the succeeding series produce cuttings 29, 29'. In a modification the lateral cutting-edges are not removed in alternate teeth.
GB2785625A 1925-11-05 1925-11-05 Screw thread cutting tool Expired GB252618A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2785625A GB252618A (en) 1925-11-05 1925-11-05 Screw thread cutting tool

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2785625A GB252618A (en) 1925-11-05 1925-11-05 Screw thread cutting tool

Publications (1)

Publication Number Publication Date
GB252618A true GB252618A (en) 1926-06-03

Family

ID=10266428

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2785625A Expired GB252618A (en) 1925-11-05 1925-11-05 Screw thread cutting tool

Country Status (1)

Country Link
GB (1) GB252618A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3176331A (en) * 1962-11-01 1965-04-06 Pipe Machinery Company High speed carbide chaser set
US3177508A (en) * 1962-11-01 1965-04-13 Pipe Machinery Company Set of high speed carbide chasers
CN102756185A (en) * 2012-07-10 2012-10-31 天津钢管集团股份有限公司 Thread chaser for cutting double-line pipe threads
CN103889629A (en) * 2011-10-19 2014-06-25 住友电工硬质合金株式会社 Cutting tool for screw thread cutting

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3176331A (en) * 1962-11-01 1965-04-06 Pipe Machinery Company High speed carbide chaser set
US3177508A (en) * 1962-11-01 1965-04-13 Pipe Machinery Company Set of high speed carbide chasers
CN103889629A (en) * 2011-10-19 2014-06-25 住友电工硬质合金株式会社 Cutting tool for screw thread cutting
EP2769795A4 (en) * 2011-10-19 2015-10-21 Sumitomo Elec Hardmetal Corp Cutting tool for screw thread cutting
CN103889629B (en) * 2011-10-19 2016-01-27 住友电工硬质合金株式会社 Threading tool
CN102756185A (en) * 2012-07-10 2012-10-31 天津钢管集团股份有限公司 Thread chaser for cutting double-line pipe threads

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