- 专利标题： Grease, antifriction bearing, antifriction bearing device, and information recording/reproducing device
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申请号： US15640955申请日： 2017-07-03
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公开(公告)号： US10968954B2公开(公告)日： 2021-04-06
- 发明人: Akihiro Iino , Takayuki Kosaka , Misato Hanaoka , Hisaya Nakamura , Koji Ishii
- 申请人： SEIKO INSTRUMENTS INC.
- 申请人地址： JP Chiba
- 专利权人： SEIKO INSTRUMENTS INC.
- 当前专利权人： SEIKO INSTRUMENTS INC.
- 当前专利权人地址： JP Chiba
- 代理机构： Adams & Wilks
- 优先权： JPJP2016-137028 20160711
- 主分类号： F16C33/66
- IPC分类号： F16C33/66 ; C10M169/02 ; F16C33/41 ; C10M101/02 ; C10M105/04 ; F16C19/54 ; C10N20/02 ; C10N30/02 ; C10N30/06 ; C10N40/02 ; C10N50/10 ; C10M115/08 ; G11B5/48
摘要：
A bearing grease includes a base oil and a thickener, and the base oil includes mineral oil and poly-α-olefin. The poly-α-olefin may be a blend of poly-α-olefin having a kinetic viscosity higher than that of the mineral oil and poly-α-olefin having a kinetic viscosity equal to or lower than that of the mineral oil, and the kinetic viscosity of the base oil at 40° C. is in a range of 40 through 90 mm2/s. The amount of the poly-α-olefin by mass in the base oil is greater than the amount of the mineral oil by mass in the base oil. The worked penetration of the grease is in a range of 200 through 250. The grease reduces flying grease and outgas and has superior low-temperature characteristics.