Abstract: There are provided a self-lubricating composite material capable of obtaining a necessary strength at a mixing ratio of a solid lubricant such as molybdenum disulfide (MoS2) of 60 mass % or greater; and a rolling bearing, a linear motion device, a ball screw device, a linear motion guide device, and a transport device using the same. To that end, a self-lubricating composite material which is material used in a solid-lubricant spacer (6) of a rolling bearing (1) contains 60 mass % to 80 mass % of molybdenum disulfide (MoS2) and a balance containing iron (Fe).

Abstract: In a roller support device, an inner peripheral surface of a bearing box is covered with a material having a poor wettability with respect to a molten metal, such as tantalum, graphite, C/C composite, silicon carbide or the like. The molten metal does not adhere to the covered portion, or even if the molten metal adheres to and is solidified on the covered portion, the molten metal can be peeled off with a light force. Therefore, after a support roller is pulled up from the molten metal, the molten metal does not prevent a rolling bearing from shifting in the axial direction thereof so that the roller support device can prevent an excessive force from being applied to the rolling bearing when the support roller, after it is thermally expanded once, is contracted as the temperature falls.

Abstract: A rolling bearing to be used in molten metal provides inner and outer races, a plurality of rolling elements and a cage, in which a solid lubricant is exposed at least in contact surfaces between the cage and the plurality of rolling elements, and further in which the solid lubricant is exposed also in contact surfaces between the cage and the inner and outer races. The cage is formed of a material having specific gravity of 0.8 to 1.2 with respect to the molten metal. In the rolling bearing, the wear resistance of the inner and outer races, the rolling elements and the cage can be improved.