| abstract |
(57) [Abstract] [Problem] It has excellent performance balance of low dust generation, low rolling property, and fretting resistance, can extend the lubrication period and can reduce maintenance cost, Provided is a low-dust-generating grease composition suitable for use in a clean environment. Further, the present invention provides a bearing device with a low dust generation amount, which is filled with such a low dust generation grease composition and is suitable for use in a clean environment such as a semiconductor manufacturing apparatus, a liquid crystal manufacturing apparatus, and an electronic computer. A mineral oil and / or a synthetic lubricating base oil are provided. (A) As a thickener, lithium stearate soap and (B) one or more compounds selected from the group consisting of paraffin oxide and diphenyl hydrogen phosphite are contained in specific amounts, respectively. A grease composition having a degree in the range of 270 to 350. Further, the present invention is a bearing device such as a linear guide, a ball screw, a rolling bearing, or the like in which such a grease composition is sealed. |