SU1095519A1 - Spiral drill - Google Patents

Spiral drill

Info

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
Application number
SU3592002/08A
Other languages
Russian (ru)
Inventor
А.В. Зубков
В.А. Зубков
А.Е. Волков
В.П. Катусов
Original Assignee
А.В. Зубков
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by А.В. Зубков filed Critical А.В. Зубков
Priority to SU3592002/08A priority Critical patent/SU1095519A1/en
Application granted granted Critical
Publication of SU1095519A1 publication Critical patent/SU1095519A1/en

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.
SU3592002/08A 1983-05-27 1983-05-27 Spiral drill SU1095519A1 (en)

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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2576356C1 (en) * 2014-09-22 2016-02-27 Сергей Николаевич Низов Twist bit

Cited By (1)

* Cited by examiner, † Cited by third party
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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