SU1095519A1 - Spiral drill - Google Patents
Spiral drillInfo
- Publication number
- SU1095519A1 SU1095519A1 SU3592002/08A SU3592002A SU1095519A1 SU 1095519 A1 SU1095519 A1 SU 1095519A1 SU 3592002/08 A SU3592002/08 A SU 3592002/08A SU 3592002 A SU3592002 A SU 3592002A SU 1095519 A1 SU1095519 A1 SU 1095519A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- drill
- radius
- helical
- forming
- periphery
- Prior art date
Links
Abstract
FIELD: tooling. SUBSTANCE: spiral drill with helical chip-breaking flutes inclined to the drill axis at an acute angle, and back surface turning into a margin is featured by the fact that the helical flutes are made in the form of three conjugated circular helical surfaces; in the end section the front radial surface has radius R=(0.3 to 0.35)d, forming on the drill periphery a rake angle of 25 to 30 deg.; the back radial surface has radius R= (0.25 to 0.30)d, forming on the drill periphery a lip-relief angle of 8 to 12 deg.; the flute cavity has radius R=(1.0 to 1.5)d, and the drill core makes up 0,2d ≅ k < 0,3d, where d-drill diameter. EFFECT: enhanced durability, simplified manufacture of drill and enhanced quality of drilling.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU3592002/08A SU1095519A1 (en) | 1983-05-27 | 1983-05-27 | Spiral drill |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU3592002/08A SU1095519A1 (en) | 1983-05-27 | 1983-05-27 | Spiral drill |
Publications (1)
Publication Number | Publication Date |
---|---|
SU1095519A1 true SU1095519A1 (en) | 1996-12-20 |
Family
ID=60540855
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU3592002/08A SU1095519A1 (en) | 1983-05-27 | 1983-05-27 | Spiral drill |
Country Status (1)
Country | Link |
---|---|
SU (1) | SU1095519A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2576356C1 (en) * | 2014-09-22 | 2016-02-27 | Сергей Николаевич Низов | Twist bit |
-
1983
- 1983-05-27 SU SU3592002/08A patent/SU1095519A1/en active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2576356C1 (en) * | 2014-09-22 | 2016-02-27 | Сергей Николаевич Низов | Twist bit |
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