Nidec Corporation

Cosmo Oil Lubricants Co., Ltd.

Ryuji Terauchi

Yuji Hagiwara

A conductive lubricating oil composition including at least one lubricating base oil selected from the group consisting of compounds represented by the following General Formula (1) and compounds represented by the following General Formula (2), and at least one conductivity imparting agent selected from the group consisting of potassium trifluoromethanesulfonate, lithium trifluoromethanesulfonate, lithium nonafluorobutanesulfonate, lithium bis(trifluoromethanesulfonyl)imide, potassium bis(trifluoromethanesulfonyl)imide, and lithium tris(trifluoromethanesulfonyl)methide, in an amount of from 0.01% by mass to 1% by mass, and having a rate of change in conductivity after storage at 120&#xb0; C. for 200 hours of 10% or less. The definitions of R, R, m and n in the formulae are as indicated in the specification. Cases of m&#x2212;n=2 are excluded. 

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Saitama, Japan

Ryuji Terauchi