Title:
グリース組成物及びグリース封入転がり軸受
Document Type and Number:
Japanese Patent JP5727276
Kind Code:
B2
Abstract:
A grease composition for a rolling bearing for a motor to support a rotor of the motor, containing a pentaerythritol ester base oil with a kinematic viscosity at 40° C. of 20 to 55 mm2/s; 7 to 13 mass % of a diurea thickener represented by formula (A) where each R group is defined; and a rust inhibitor mixture selected from the group consisting of polyol ester type rust inhibitors and organic sulfonate type rust inhibitors. The grease composition can prevent a peculiar noise from being produced at low temperatures, satisfy the low torque performance over a wide temperature range, extend the bearing lubrication life even under the circumstances of high temperature, and exhibit excellent rust inhibiting effect on varnish.
Inventors:
Ryo Aida
Yu Imai
Kenta Sakaguchi
Yu Imai
Kenta Sakaguchi
Application Number:
JP2011082624A
Publication Date:
June 03, 2015
Filing Date:
April 04, 2011
Export Citation:
Assignee:
Kyodo Yushi Co., Ltd.
ntn corporation
ntn corporation
International Classes:
C10M169/02; C10M105/38; C10M115/08; C10M129/76; C10M135/10; F16C19/02; F16C19/22; F16C33/38; F16C33/46; F16C33/66; F16C33/78
Domestic Patent References:
| JP3079698A | ||||
| JP2004270929A | ||||
| JP2004116661A | ||||
| JP2006124429A | ||||
| JP2005232470A | ||||
| JP11279578A | ||||
| JP2010106952A |
Foreign References:
| WO2008050834A1 |
Attorney, Agent or Firm:
Koichi Tsujii
Sadao Kumakura
Atsushi Hakoda
Kenji Asai
Kazuo Yamazaki
Satsuki Ichikawa
Matsuda Nanae
Sadao Kumakura
Atsushi Hakoda
Kenji Asai
Kazuo Yamazaki
Satsuki Ichikawa
Matsuda Nanae