GB380391A - Improvements in or relating to screw taps - Google Patents
Improvements in or relating to screw tapsInfo
- Publication number
- GB380391A GB380391A GB11141/32A GB1114132A GB380391A GB 380391 A GB380391 A GB 380391A GB 11141/32 A GB11141/32 A GB 11141/32A GB 1114132 A GB1114132 A GB 1114132A GB 380391 A GB380391 A GB 380391A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tapered
- cutting
- april
- class
- iii
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23G—THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH
- B23G5/00—Thread-cutting tools; Die-heads
- B23G5/02—Thread-cutting tools; Die-heads without means for adjustment
- B23G5/06—Taps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23G—THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH
- B23G1/00—Thread cutting; Automatic machines specially designed therefor
- B23G1/16—Thread cutting; Automatic machines specially designed therefor in holes of workpieces by taps
- B23G1/18—Machines with one working spindle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23G—THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH
- B23G2200/00—Details of threading tools
- B23G2200/32—Tools having a decreasing diameter in the direction of the shank from the tip
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
Abstract
380,391. Taps. BALZ, 0., 20, Schelztor. strasse, Esslingenon - Neckar, Germany. April 19, 1932, No. 11141. Convention date, April 20, 1931. Addition to 291,356, [Class 83 (iii), Metals, Cutting]. [Class 83 (iii).] The feed portion of the tap described in the parent Specification is conically tapered, decreasing in thread diameter towards the shank. The cutting and feeding portions a, b, respectively, merge into the correct external diameter to be cut about midway of the tap, the thread being tapered conically fom the front end throughout its whole length whilst the cutting portion is oppositely externnally tapered only.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE380391X | 1931-04-20 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB380391A true GB380391A (en) | 1932-09-15 |
Family
ID=6346986
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB11141/32A Expired GB380391A (en) | 1931-04-20 | 1932-04-19 | Improvements in or relating to screw taps |
Country Status (2)
Country | Link |
---|---|
FR (2) | FR654532A (en) |
GB (1) | GB380391A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2627408A1 (en) * | 1988-02-23 | 1989-08-25 | Sadex Outillages | Tap for threading hole - has height of teeth progressively reduced as they taper away from free end NoAbstract |
DE10326073B4 (en) * | 2002-06-13 | 2009-04-09 | Kennametal Inc. | thread milling |
CN109108400A (en) * | 2018-09-06 | 2019-01-01 | 基准精密工业(惠州)有限公司 | Screw tap |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3651678A (en) * | 1968-11-06 | 1972-03-28 | Reed Rolled Thread Die Co | Truncated through feeding thread rolling die |
-
1928
- 1928-05-22 FR FR654532D patent/FR654532A/en not_active Expired
-
1932
- 1932-03-25 FR FR41593D patent/FR41593E/en not_active Expired
- 1932-04-19 GB GB11141/32A patent/GB380391A/en not_active Expired
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2627408A1 (en) * | 1988-02-23 | 1989-08-25 | Sadex Outillages | Tap for threading hole - has height of teeth progressively reduced as they taper away from free end NoAbstract |
DE10326073B4 (en) * | 2002-06-13 | 2009-04-09 | Kennametal Inc. | thread milling |
US7959381B2 (en) | 2002-06-13 | 2011-06-14 | Kennametal Inc. | Thread milling tool |
CN109108400A (en) * | 2018-09-06 | 2019-01-01 | 基准精密工业(惠州)有限公司 | Screw tap |
CN109108400B (en) * | 2018-09-06 | 2023-08-15 | 基准精密工业(惠州)有限公司 | Screw tap |
Also Published As
Publication number | Publication date |
---|---|
FR41593E (en) | 1933-02-07 |
FR654532A (en) | 1929-04-05 |
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