IE41050L - Twist drill. - Google Patents
Twist drill.Info
- Publication number
- IE41050L IE41050L IE751033A IE103375A IE41050L IE 41050 L IE41050 L IE 41050L IE 751033 A IE751033 A IE 751033A IE 103375 A IE103375 A IE 103375A IE 41050 L IE41050 L IE 41050L
- Authority
- IE
- Ireland
- Prior art keywords
- drill
- radius
- cutting edges
- angle
- faces
- Prior art date
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
- B23B2251/04—Angles, e.g. cutting angles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2251/00—Details of tools for drilling machines
- B23B2251/04—Angles, e.g. cutting angles
- B23B2251/043—Helix angles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2251/00—Details of tools for drilling machines
- B23B2251/24—Overall form of drilling tools
- B23B2251/241—Cross sections of the diameter of the drill
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Drilling Tools (AREA)
Abstract
A twist drill having a cross sectional shape such that the curvatures of the surfaces of the drill faces, defined by the flute leading faces in planes transverse to the drill axes are convex, the convexity being of such an extent that it conforms substantially to a radius of between 0.9 and 1.2 of the drill radius, and having a conventional helix angle, that is to say between 25degrees and 45degrees and a conventional point angle, that is to say between 90degrees and 150degrees so that the cutting edges are curved but lie on the surface of an imaginary cone having the same axis as the drill can be sharpened on a conventional drill grinding machine and the lip rake angle is substantially constant along the cutting edges radially outwards of a core portion of the drill. [IN144887A1]
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB22130/74A GB1509912A (en) | 1974-05-17 | 1974-05-17 | Twist drills |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| IE41050L true IE41050L (en) | 1975-11-17 |
| IE41050B1 IE41050B1 (en) | 1979-10-10 |
Family
ID=10174379
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IE1033/75A IE41050B1 (en) | 1974-05-17 | 1975-05-08 | An improvement in or relating to twist drills |
Country Status (15)
| Country | Link |
|---|---|
| JP (1) | JPS50156790A (en) |
| AU (1) | AU500271B2 (en) |
| BR (1) | BR7503011A (en) |
| CA (1) | CA1022775A (en) |
| DE (1) | DE2521938C3 (en) |
| ES (1) | ES437919A1 (en) |
| FR (1) | FR2270978A1 (en) |
| GB (1) | GB1509912A (en) |
| IE (1) | IE41050B1 (en) |
| IL (1) | IL47302A (en) |
| IN (1) | IN144887B (en) |
| IT (1) | IT1038197B (en) |
| NL (1) | NL7505612A (en) |
| SE (1) | SE7505581L (en) |
| ZA (1) | ZA753040B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5331286A (en) * | 1976-09-02 | 1978-03-24 | Riyousuke Hosoi | Ball end mill |
| SE8300910L (en) * | 1983-02-18 | 1984-08-19 | Santrade Ltd | COMPOSITION BODY CONSISTS OF A SUBSTRATE COATED WITH HEART, Wear-resistant finish |
| GB2184046B (en) * | 1985-12-13 | 1990-01-24 | Skf & Dormer Tools | Twist drill |
| JPS634211U (en) * | 1986-06-23 | 1988-01-12 | ||
| DE3891420T1 (en) * | 1988-10-21 | 1990-11-22 | Aleksej Vladimirovic Cubkov | SPIRAL DRILL |
| EP2366478B1 (en) * | 2001-07-10 | 2020-04-15 | Mitsubishi Materials Corporation | Drill |
| JP2006055965A (en) * | 2004-08-23 | 2006-03-02 | Osg Corp | Cemented carbide drill causing low work hardening |
| JP5301647B2 (en) * | 2009-02-20 | 2013-09-25 | オーエスジー株式会社 | Drill tap and internal thread processing method |
-
1974
- 1974-05-17 GB GB22130/74A patent/GB1509912A/en not_active Expired
-
1975
- 1975-05-08 IE IE1033/75A patent/IE41050B1/en unknown
- 1975-05-09 CA CA226,654A patent/CA1022775A/en not_active Expired
- 1975-05-12 ZA ZA00753040A patent/ZA753040B/en unknown
- 1975-05-13 NL NL7505612A patent/NL7505612A/en not_active Application Discontinuation
- 1975-05-14 IN IN971/CAL/1975A patent/IN144887B/en unknown
- 1975-05-14 IL IL47302A patent/IL47302A/en unknown
- 1975-05-15 FR FR7515147A patent/FR2270978A1/fr not_active Withdrawn
- 1975-05-15 BR BR3840/75D patent/BR7503011A/en unknown
- 1975-05-15 SE SE7505581A patent/SE7505581L/en unknown
- 1975-05-16 JP JP50058458A patent/JPS50156790A/ja active Pending
- 1975-05-16 IT IT23421/75A patent/IT1038197B/en active
- 1975-05-16 ES ES437919A patent/ES437919A1/en not_active Expired
- 1975-05-16 DE DE2521938A patent/DE2521938C3/en not_active Expired
- 1975-05-19 AU AU81256/75A patent/AU500271B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| IL47302A (en) | 1978-03-10 |
| BR7503011A (en) | 1976-04-20 |
| IT1038197B (en) | 1979-11-20 |
| IN144887B (en) | 1978-07-22 |
| DE2521938A1 (en) | 1975-11-27 |
| DE2521938B2 (en) | 1979-07-05 |
| AU500271B2 (en) | 1979-05-17 |
| ZA753040B (en) | 1976-04-28 |
| DE2521938C3 (en) | 1980-03-06 |
| ES437919A1 (en) | 1977-01-01 |
| CA1022775A (en) | 1977-12-20 |
| IE41050B1 (en) | 1979-10-10 |
| IL47302A0 (en) | 1975-07-28 |
| SE7505581L (en) | 1975-11-18 |
| JPS50156790A (en) | 1975-12-18 |
| AU8125675A (en) | 1976-11-25 |
| FR2270978A1 (en) | 1975-12-12 |
| NL7505612A (en) | 1975-11-19 |
| GB1509912A (en) | 1978-05-04 |
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