Cross roller between the roller bearing inner ring and the outer ring, arranged at regular intervals to cross each other at right angles. Cross roller bearing can withstand (e.g. axial, thrust or momentum load, etc.) load from all directions. Because the roller surface into line contact with the rail, and therefore, the load bearing elastically deformed by the possibility of very small. Crossed roller bearings are widely used in industrial automation, such as robots, machine tools and medical facilities, we require high rigidity, compact and high-speed still ensuring accuracy of occasions
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