A drive device includes a slide bearing; a shaft that passes through the slide bearing; a gear that is fixed to the shaft; and a grease composition that is held in a clearance between the slide bearing and the shaft. At least one of the slide bearing and the shaft is made of a resin. The clearance is in a range of 10 to 110 μm. The grease composition contains a hydrocarbon base oil and lithium soap serving as a thickener. A weight ratio of the hydrocarbon base oil to the lithium soap is in a range of 94.5:5.5 to 96.0:4.0. A consistency of the grease composition is in a range of 360 to 400.

Provided is a lubricant composition having small shear rate dependence of its apparent viscosity. The lubricant composition includes a perfluoropolyether as a base oil, and fluorine resin particles as a thickener. The lubricant composition further includes a fluorine-containing polymer having a tetrafluoroethylene structure under a state in which the polymer is dissolved in the perfluoropolyether.

Provided is a lubricant composition having small shear rate dependence of its apparent viscosity. The lubricant composition includes a perfluoropolyether as a base oil, and fluorine resin particles as a thickener. The lubricant composition further includes a fluorine-containing polymer having a tetrafluoroethylene structure under a state in which the polymer is dissolved in the perfluoropolyether.

A solid lubricant to be applied onto an image carrier of an image forming apparatus of an electrophotographic system, includes a metal soap and resin particles, and the resin particles have a particle main body constituted by a rigid resin other than fluorine-based resins, and fluorine atoms carried on the surface of the particle main body.

A compound of the present invention is represented by the general formula (1) and has a 40 C. kinetic viscosity (v) that satisfies 4 mm.sup.2/sv30 mm.sup.2/s,
C.sub.nH.sub.2n+1(OCH.sub.2CH.sub.2).sub.pO(CH.sub.2).sub.3(CO)OC.sub.mH.sub.2m+1(1) (where O represents an oxygen atom, C represents a carbon atom, H represents a hydrogen atom, m is an integer of 1 to 18, n is an integer of 1 to 12, p is an integer of 1 to 3, and 2n+m30 is satisfied). The present invention provides (i) a lubricant excellent in energy-saving, heat resistance, and low-temperature fluidity and (ii) use of the lubricant.

A drive device includes a plurality of gears; and a grease composition that is held on a tooth flank of at least one gear of the gears. The at least one gear is made of a resin. The grease composition contains a hydrocarbon base oil, lithium soap serving as a thickener, and olefin resin powder. A weight ratio between the hydrocarbon base oil and the lithium soap in the grease composition is in a range of 94.5:5.5 to 96.0:4.0. A consistency of the grease composition is in a range of 360 to 400.

A solid lubricant to be applied onto an image carrier of an image forming apparatus of an electrophotographic system, includes a metal soap and resin particles, and the resin particles have a particle main body constituted by a rigid resin other than fluorine-based resins, and fluorine atoms carried on the surface of the particle main body.

A drive device includes a plurality of gears; and a grease composition that is held on a tooth flank of at least one gear of the gears. The at least one gear is made of a resin. The grease composition contains a hydrocarbon base oil, lithium soap serving as a thickener, and olefin resin powder. A weight ratio between the hydrocarbon base oil and the lithium soap in the grease composition is in a range of 94.5:5.5 to 96.0:4.0. A consistency of the grease composition is in a range of 360 to 400.

A drive device includes a gear having a hole; a shaft that passes through the hole; and a grease composition that is held in a clearance between the shaft and an inner peripheral surface of the hole. The gear rotates on a peripheral surface of the shaft. At least one of the gear and the shaft is made of a resin. The clearance is in a range of 10 to 110 m. The grease composition contains a hydrocarbon base oil and lithium soap serving as a thickener. A weight ratio of the hydrocarbon base oil to the lithium soap is in a range of 94.5:5.5 to 96.0:4.0. A consistency of the grease composition is in a range of 360 to 400.

A sliding member having a sliding surface configured to include a heat-resistant thermoplastic resin other than a fluororesin, and resin particles having a siloxane group other than the heat-resistant thermoplastic resin, in which an average particle diameter of the resin particles is 0.1 m or more and 10 m or less, a surface roughness Rsk of the sliding surface is 1.0 or less, and a surface exposure rate of the resin particles on the sliding surface is 2% or more.