Title:
【発明の名称】ツイストドリル
Document Type and Number:
Japanese Patent JP3071466
Kind Code:
B2
Abstract:
PCT No. PCT/DE94/00895 Sec. 371 Date Feb. 2, 1996 Sec. 102(e) Date Feb. 2, 1996 PCT Filed Aug. 2, 1994 PCT Pub. No. WO95/04624 PCT Pub. Date Feb. 16, 1995The invention relates to a twist drill, especially for metals. It has a substantially cylindrical basic component (1) divided into a shaft (2) and a cutting section (3), the central longitudinal axis (5) of which is the axis of rotation of the twist drill. Several swarf grooves (4, 4') are made in the cylindrical surface of the basic component (1) which extend spirally and continuously from the shaft (2) to the drill tip (6) and bound a swarf chamber (35). The feature of the twist drill is that its drill core diameter tapers continuously from the drill tip (6) to the shaft (2).
Inventors:
Just, Werner
Mühlfriedel, Dieter
Mühlfriedel, Dieter
Application Number:
JP50615194A
Publication Date:
July 31, 2000
Filing Date:
August 02, 1994
Export Citation:
Assignee:
Kennametal Hertel Akchen Gesellschaft Werkzweigend Hartstoffe
International Classes:
B23B51/02; B23B51/00; (IPC1-7): B23B51/00
Domestic Patent References:
| JP5277819A | ||||
| JP6384807A |
Attorney, Agent or Firm:
Toshio Yano (3 outside)