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Title:
SPIRAL TAP
Document Type and Number:
WIPO Patent Application WO/2010/049989
Kind Code:
A1
Abstract:
A spiral tap (10) in which the external thread at a chamfer (16b) has such a profile as the outer circumferential side portion of a thread having the same dimension as that of a complete thread (16a) is cut linearly on the cross-section including the central axis (O), and the inclination angle θ against that line, i.e. the central axis (O) of the outer circumferential surface (26), is within the range of -15°≤θ≤30'. Since the curling state of chips is stabilized, the chips are discharged well from the spiral flute (20) to the outside and durability is enhanced because chipping of the cutting tooth caused by biting of chips is constrained.

Inventors:
NORIMATSU, Kentarou (Miyamae Ichinomiya-cho,,Toyokawa-sh, Aichi 00, 44200, JP)
乗松 顕太朗 (〒00 愛知県豊川市一宮町宮前149 オーエスジー株式会社内 Aichi, 44200, JP)
Application Number:
JP2008/069477
Publication Date:
May 06, 2010
Filing Date:
October 27, 2008
Export Citation:
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Assignee:
OSG CORPORATION (22 Honnogahara 3-chome, Toyokawa-shi Aichi, 05, 44200, JP)
オーエスジー株式会社 (〒05 愛知県豊川市本野ヶ原三丁目22番地 Aichi, 44200, JP)
NORIMATSU, Kentarou (Miyamae Ichinomiya-cho,,Toyokawa-sh, Aichi 00, 44200, JP)
International Classes:
B23G5/06
Foreign References:
JPS59196120A
JP2002292521A
JPH0720222U
JP2005069265A
Attorney, Agent or Firm:
IKEDA, Haruyuki (Ikeda Patent Office, Nagoya-Dia. Bldg. No.215-1 Meieki 3-chome,Nakamura-ku, Nagoya-shi, Aichi, 450-0002, JP)
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