| 摘要 |
PROBLEM TO BE SOLVED: To provide a direct acting bearing device capable of applying to a use required for a cleaning property and oil free and capable of enhancing durability. SOLUTION: In this direct acting bearing device, a PTFE (polytetrafluoroethylene)-based solid lubricant having superior load resistance is applied to a ball 15 made of ceramics. Meanwhile, a solid lubricant consisting of molybdenum disulfide having superior heat resistance is applied to the groove 5 of a track rail 1, a groove 10 constituting a loop raceway 13, a hole 11, and a turn hole. The use, of the ball 15 made of ceramics as a rolling element enhances durability compared with the case of employing a ball made of stainless steel. Metallic contact between the ball 15 and the rail 1 is avoided even if the coatings of the solid lubricants are peeled by the sliding of the ball 15, preventing seizure and unusual wear.
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