Title:
A tap for screw cutting
Document Type and Number:
Japanese Patent JP6028098
Kind Code:
B2
Abstract:
Provided is a thread-cutting tap, which limits chipping that occurs during tapping and with which female thread precision is also stabilized. Chipping is limited by forming a protruding circular shape (32) on the cutting face (30) of a cutting edge (28). Moreover, the thrust load (Fs), which acts on the negative side when the spiral tap (10) bites into the material that is being cut, is reduced and excessive advancement of the spiral tap (10) is also eliminated. Consequently, because spiral tap (10) cutting conditions are favorable, female thread precision is also stabilized.
Inventors:
Fumiya Koide
Kawada Katsuto
Takayuki Nakajima
Kawada Katsuto
Takayuki Nakajima
Application Number:
JP2015518036A
Publication Date:
November 16, 2016
Filing Date:
May 24, 2013
Export Citation:
Assignee:
OSG Co., Ltd.
International Classes:
B23G5/06; B24C1/00; B24C11/00
Domestic Patent References:
| JP2010506747A | 2010-03-04 | |||
| JPS49130576A | 1974-12-13 |
Foreign References:
| WO2008075402A1 | 2008-06-26 | |||
| US20050042049A1 | 2005-02-24 | |||
| WO2011086675A1 | 2011-07-21 |
Attorney, Agent or Firm:
Haruyuki Ikeda
Kojiro Ikeda
Kojiro Ikeda