公开(公告)号：US20180010642A1

公开(公告)日：2018-01-11

申请号：US15640955

申请日：2017-07-03

Applicant: SEIKO INSTRUMENTS INC.

Inventor： Akihiro IINO ,  Takayuki KOSAKA ,  Misato HANAOKA ,  Hisaya NAKAMURA ,  Koji ISHII

IPC: F16C33/66 ,  C10M115/08 ,  C10M101/02 ,  F16C19/54 ,  F16C33/41 ,  C10M105/04 ,  G11B5/48

CPC classification number: F16C33/6633 ,  C10M101/02 ,  C10M105/04 ,  C10M115/08 ,  C10M169/02 ,  C10M2203/024 ,  C10M2203/1006 ,  C10M2203/1025 ,  C10M2205/0285 ,  C10M2215/1026 ,  C10N2220/022 ,  C10N2230/02 ,  C10N2230/06 ,  C10N2240/02 ,  C10N2250/10 ,  F16C19/546 ,  F16C33/416 ,  F16C33/418 ,  F16C33/6614 ,  F16C33/6688 ,  F16C2210/04 ,  F16C2370/12 ,  G11B5/4813

Abstract: The invention has an object of providing grease reduced in an amount of the flying grease and an amount of the outgas, and superior in low-temperature characteristic, an antifriction bearing using the grease, an antifriction bearing device, and an information recording/reproducing device. A grease includes a base oil, and a thickener, the base oil includes mineral oil and poly-α-olefin, the poly-α-olefin is higher in mass than the mineral oil, the poly-α-olefin includes poly-α-olefin higher in kinetic viscosity than the mineral oil, the kinetic viscosity of the base oil at 40° C. is in a range of 40 through 90 mm2/s, and worked penetration is in a range of 200 through 250. Further, an antifriction bearing, an antifriction bearing device, and an information recording/reproducing device use the grease.