发明授权
- 专利标题: Rolling bearings and greases for the same
- 专利标题(中): 滚动轴承和润滑脂相同
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申请号: US09429163申请日: 1999-10-28
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公开(公告)号: US06417143B1公开(公告)日: 2002-07-09
- 发明人: Hidenobu Mikami , Koya Ohira , Yoshinobu Akamatsu , Masaki Egami , Takashi Yasunishi
- 申请人: Hidenobu Mikami , Koya Ohira , Yoshinobu Akamatsu , Masaki Egami , Takashi Yasunishi
- 优先权: JP10-310806 19981030; JP10-322477 19981112
- 主分类号: C10M11704
- IPC分类号: C10M11704
摘要:
Rolling bearings are proposed in which acoustic deterioration is suppressed which maintaining low dust, low torque and long life. Also, a grease for rolling bearings is proposed which is less likely to scatter under centrifugal force at high speed rotation, whereby preventing malfunction and noise of electronic information devices. A lubricating oil film of an ester-series oil having a dynamic viscosity at 40° C. of 35 mm2/s or over is formed on the friction surface of a rolling bearing. There is also provided a high-speed rolling bearing in which a lubricating grease having its worked penetration (JIS K2220) adjusted to 175-250 is retained therein. The grease is preferably prepared by adding a thickening agent containing 50 wt % or more of an aliphatic lithium salt 12-24 in carbon number to a base oil comprising 30 wt % or more of an ester oil having a dynamic viscosity at 40° C. of 10 mm2/s or over, and having its worked penetration (JIS K2220) adjusted to 175-250.