ATE48773T1 - SELF DRILLING SCREW. - Google Patents
SELF DRILLING SCREW.Info
- Publication number
- ATE48773T1 ATE48773T1 AT84306722T AT84306722T ATE48773T1 AT E48773 T1 ATE48773 T1 AT E48773T1 AT 84306722 T AT84306722 T AT 84306722T AT 84306722 T AT84306722 T AT 84306722T AT E48773 T1 ATE48773 T1 AT E48773T1
- Authority
- AT
- Austria
- Prior art keywords
- drilling
- screw
- tip end
- flute
- axis
- Prior art date
Links
Abstract
SELF-DRILLING SCREW AND METHOD AND MEANS FOR MANUFACTURING SAME A self-drilling screw having a head at one end and a forged drilling end configuration at the other. The drilling end configuration comprises a pair of longitudinally extending flutes which are separated by land portions and which extend through a tapered tip end to form two cutting edges. The forging operation is performed in such a way as to promote complete formation of the tip end and that may be achieved by inhibiting material flow away from that tip end or by promoting extrusion of material towards the tip end. The drilling end portion of the screw is of elliptical cross section having a minor axis in the region of 60 to 80% of the major axis, and a fillet is formed in the base of each flute at the tip end portion of the flute. Each fillet has a flat surface arranged generally parallel to the screw axis and angularly relative to the adjacent cutting edge of the tip end. At least one interruption, which may be a depression of a projection is formed on each of a plurality of side surfaces of the drilling end portion. Also, each flute may comprise two end to end portions which extend at different angles to the longitudinal axis of the screw.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AUPG169083 | 1983-10-04 | ||
| EP84306722A EP0136912B1 (en) | 1983-10-04 | 1984-10-02 | Self-drilling screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ATE48773T1 true ATE48773T1 (en) | 1990-01-15 |
Family
ID=3770340
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AT84306722T ATE48773T1 (en) | 1983-10-04 | 1984-10-02 | SELF DRILLING SCREW. |
Country Status (9)
| Country | Link |
|---|---|
| JP (1) | JPS60121031A (en) |
| AT (1) | ATE48773T1 (en) |
| CA (1) | CA1249141A (en) |
| DE (1) | DE3480766D1 (en) |
| FI (1) | FI843882L (en) |
| NO (1) | NO165084C (en) |
| NZ (1) | NZ209761A (en) |
| SG (1) | SG108491G (en) |
| ZA (1) | ZA847745B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6420515U (en) * | 1987-07-28 | 1989-02-01 | ||
| TW201350690A (en) * | 2012-06-12 | 2013-12-16 | Yuan-Qi Li | Screw drill tail structure |
| KR102108041B1 (en) * | 2020-02-12 | 2020-05-07 | 김상운 | A long bolt manufacturing method using heading machine |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50773U (en) * | 1973-05-01 | 1975-01-07 |
-
1984
- 1984-10-02 ZA ZA847745A patent/ZA847745B/en unknown
- 1984-10-02 DE DE8484306722T patent/DE3480766D1/en not_active Expired - Lifetime
- 1984-10-02 AT AT84306722T patent/ATE48773T1/en not_active IP Right Cessation
- 1984-10-03 NO NO843980A patent/NO165084C/en unknown
- 1984-10-03 NZ NZ209761A patent/NZ209761A/en unknown
- 1984-10-03 FI FI843882A patent/FI843882L/en not_active Application Discontinuation
- 1984-10-04 CA CA000464756A patent/CA1249141A/en not_active Expired
- 1984-10-04 JP JP59207227A patent/JPS60121031A/en active Granted
-
1991
- 1991-12-24 SG SG1084/91A patent/SG108491G/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| NO165084B (en) | 1990-09-10 |
| NZ209761A (en) | 1987-04-30 |
| DE3480766D1 (en) | 1990-01-25 |
| FI843882L (en) | 1985-04-05 |
| CA1249141A (en) | 1989-01-24 |
| NO843980L (en) | 1985-04-09 |
| FI843882A0 (en) | 1984-10-03 |
| JPS60121031A (en) | 1985-06-28 |
| ZA847745B (en) | 1985-05-29 |
| JPH039323B2 (en) | 1991-02-08 |
| SG108491G (en) | 1992-02-14 |
| NO165084C (en) | 1990-12-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101426605B (en) | Cutting insert, in particular tip for a drill | |
| US3374815A (en) | Woodcutting saw blade | |
| US4781506A (en) | Self-drilling screw | |
| KR850001854A (en) | Drill bit | |
| KR950013670A (en) | Stone drills with hard metal punching heads | |
| US4846609A (en) | Polygonal cutting insert | |
| KR870006964A (en) | Spade bit | |
| SE8400950D0 (en) | IMPROVED PDC CUTTER AND BIT | |
| DE69013828D1 (en) | Cutting tool. | |
| JPH01256693A (en) | Drill bit blade | |
| ATE185503T1 (en) | DRILLING TOOL WITH CUTTING INSERTS | |
| CA2204990A1 (en) | Boring tool | |
| US3751782A (en) | Throw away tips for metal cutting tools | |
| US4583898A (en) | Drill screw and cutters for making same | |
| US2424473A (en) | Cutting-off blade | |
| ATE48773T1 (en) | SELF DRILLING SCREW. | |
| US4793756A (en) | Tapping screw | |
| KR840007081A (en) | Cutting tool insert | |
| US4456411A (en) | Twist drill | |
| KR960040525A (en) | Reamer for precision machining of hole surface | |
| ATE201347T1 (en) | THREAD CUTTING PLATE | |
| EP0151537A3 (en) | Improved drill bit and cutter therefor | |
| KR850001045A (en) | Twist Drill | |
| EP0136912B1 (en) | Self-drilling screw | |
| ES240111U (en) | Method of producing drill screws |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| UEP | Publication of translation of european patent specification | ||
| REN | Ceased due to non-payment of the annual fee |