JPS5676313A - Twist drill - Google Patents
Twist drillInfo
- Publication number
- JPS5676313A JPS5676313A JP14923979A JP14923979A JPS5676313A JP S5676313 A JPS5676313 A JP S5676313A JP 14923979 A JP14923979 A JP 14923979A JP 14923979 A JP14923979 A JP 14923979A JP S5676313 A JPS5676313 A JP S5676313A
- Authority
- JP
- Japan
- Prior art keywords
- drill
- twist drill
- thickness
- chisel edge
- center thickness
- 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.)
- Granted
Links
Landscapes
- Drilling Tools (AREA)
Abstract
PURPOSE: To provide the twist drill with an excellent cutting capacity by a method wherein the twist drill of a cemented carbide is provided with rigidity by thickening the center thickness thereof while strength and sharpness thereof are guaranteed at the same time by reducing a thickness of the chisel edge thereof.
CONSTITUTION: A pair of parallel cutting edges 5, 5 are formed at tip ends of cutters of the twist drill. Rands 6, 6 having widthes of 3mm or less and inclined angles of about 1°W5° are provided in contacting with the cutting edges 5, 5 thereby forming the chisel edge 7. The rigidity of the drill is increased by thickening the center thickness thereof while strength and sharpness of the drill are guaranteed by reducing the thickness of the chisel edge. The above-described center thickness may be thickened by forming surfaces 10, 10 in contacting with rands 6, 6 and making the third hand angle thereof into 5°W30°.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14923979A JPS5676313A (en) | 1979-11-17 | 1979-11-17 | Twist drill |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14923979A JPS5676313A (en) | 1979-11-17 | 1979-11-17 | Twist drill |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5676313A true JPS5676313A (en) | 1981-06-23 |
JPS626929B2 JPS626929B2 (en) | 1987-02-14 |
Family
ID=15470917
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14923979A Granted JPS5676313A (en) | 1979-11-17 | 1979-11-17 | Twist drill |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5676313A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5688083A (en) * | 1993-05-20 | 1997-11-18 | Iscar Ltd. | Drilling tool and an indexing cutting insert for use therein |
JP2010173007A (en) * | 2009-01-29 | 2010-08-12 | Kyocera Corp | Drill and cutting method using the same |
US20130136552A1 (en) * | 2011-11-30 | 2013-05-30 | Kyocera Corporation | Drill and method of manufacturing machined product |
CN104936730A (en) * | 2013-01-23 | 2015-09-23 | 钴碳化钨硬质合金公司 | Drill bit |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6441097A (en) * | 1987-08-06 | 1989-02-13 | Fuji Electric Co Ltd | Vending machine for card goods |
JP4834183B1 (en) * | 2011-03-03 | 2011-12-14 | 株式会社ビック・ツール | Drill |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS541101U (en) * | 1977-06-06 | 1979-01-06 | ||
JPS5414089A (en) * | 1977-07-05 | 1979-02-01 | Caterpillar Mitsubishi Ltd | Drill with chip breaker for high hardness |
-
1979
- 1979-11-17 JP JP14923979A patent/JPS5676313A/en active Granted
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS541101U (en) * | 1977-06-06 | 1979-01-06 | ||
JPS5414089A (en) * | 1977-07-05 | 1979-02-01 | Caterpillar Mitsubishi Ltd | Drill with chip breaker for high hardness |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5688083A (en) * | 1993-05-20 | 1997-11-18 | Iscar Ltd. | Drilling tool and an indexing cutting insert for use therein |
JP2010173007A (en) * | 2009-01-29 | 2010-08-12 | Kyocera Corp | Drill and cutting method using the same |
US20120087753A1 (en) * | 2009-01-29 | 2012-04-12 | Kyocera Corporation | Drill and cutting method using same |
US20130136552A1 (en) * | 2011-11-30 | 2013-05-30 | Kyocera Corporation | Drill and method of manufacturing machined product |
US9623488B2 (en) * | 2011-11-30 | 2017-04-18 | Kyocera Corporation | Drill and method of manufacturing machined product |
CN104936730A (en) * | 2013-01-23 | 2015-09-23 | 钴碳化钨硬质合金公司 | Drill bit |
US9662719B2 (en) | 2013-01-23 | 2017-05-30 | Kennametal, Inc. | Drill bit |
Also Published As
Publication number | Publication date |
---|---|
JPS626929B2 (en) | 1987-02-14 |
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