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AssigneeNsk Ltd.
InventorsKatsuaki Denpo, Atsushi Yokouchi, Koichi Hachiya, Michiharu Naka, Tooru Shouda, Hideki Koizumi
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This invention is to provide a conductive grease which is less to decrease conductivity as a time passes. The conductive grease comprises a base oil, a thickener, a conductive solid powder, and at least one kind of a wear inhibitor, an extreme pressure agent and an oiliness agent, wherein an amount of the conductive solid powder added is 0.1 to 10 wt %, and an amount of the at least one kind of a wear inhibitor, an extreme pressure agent and an oiliness agent added is 0.1 to 10 wt %. Further, the conductive grease comprises the base oil and at least one of conductive additives, and the conductive additives are fibrous carbon, metallic particle, metallic compound particle and carbon nano-tube. The conductive grease to be packed into the rolling bearing comprises conductive fine particles such as carbon black and has an oil separation degree of 2% or lower. A ball bearing to be favorably used at high temperature comprises an inner race and an outer race, and a plurality of balls freely rotating between both races, and the conductive grease packed into a space defined between both races and holding the plural balls therein, and the conductive grease comprises the base oil, a thickener comprising fluorine compound or silicone compound and 0.2 to 10 wt % of the carbon black.
An office machine comprising a rolling bearing comprising an outer member, an inner member and a plurality of rolling elements rotatably arranged between the outer and inner members, and being packed with a conductive grease applied between the inner and outer members and the rolling elements, said conductive grease comprising a base oil and a conductive solid powder, wherein the base oil is selected from the group consisting of poly-α-olefin oil (PAO), fluorine oil and silicone oil, and wherein the conductive solid powder comprises carbon black.
A sensitive drum fixing part of a copier or laser beam printer comprising a rolling bearing comprising an outer member, an inner member and a plurality of rolling elements rotatably arranged between the outer and inner members, and being packed with a conductive grease applied between the inner and outer members and the rolling elements, said conductive grease comprising a base oil and a conductive solid powder, wherein the base oil is selected from the group consisting of poly-α-olefin oil (PAO), fluorine oil and silicone oil, and wherein the conductive solid powder comprises carbon black.
A heat roller supporter for use in a copier or laser beam printer comprising a rolling beating comprising an outer member, an inner member and a plurality of rolling elements rotatably arranged between the outer and inner members, and being packed with a conductive grease applied between the inner and outer members and the rolling elements, said conductive grease comprising a base oil and a conductive solid powder, wherein the base oil is selected from the group consisting of poly-α-olefin oil (PAO), fluorine oil and silicone oil, and wherein the conductive solid powder comprises carbon black.
An information equipment comprising a wiling bearing comprising an outer member, an inner member and a plurality of wiling elements rotatably arranged between the outer and inner members, and being packed with a conductive grease applied between the inner and outer members and the rolling elements, said conductive grease comprising a base oil and a conductive solid powder, wherein the base oil is selected from the group consisting of poly-α-olefin oil (PAO), fluorine oil and silicone oil, and wherein the conductive solid powder comprises carbon black.
A hard disk drive comprising the rolling bearing comprising an outer member, an inner member and a plurality of rolling elements rotatably arranged between the outer and inner members, and being packed with a conductive grease applied between the inner and outer members and the rolling elements, said conductive grease comprising a base oil and a conductive solid powder, wherein the base oil is selected from the group consisting of poly-α-olefin oil (PAO), fluorine oil and silicone oil, and wherein the conductive solid powder comprises carbon black.
Dependencies are inferred from the claim text.