| 摘要 |
PROBLEM TO BE SOLVED: To provide a rolling bearing of roll neck type for use in a steel strip mill capable of securing a good lubricating performance for an inner ring inside surface stably for a long period of time. SOLUTION: The inner ring of this rolling bearing has an inside surface portion Mb positioned between a major diametric portion 13 for supplying a lubricant and making guidance at the time of inserting a shaft and circumferential grooves 12 for storing the lubricant adjoining one another over the two ends in axial direction of the inner ring inside surface Ma, and a cylindrical lubricant passage 15a is formed to put the major diametric portion 13 and the grooves 12 in communication over the whole circumference of the inner ring inside surface, or otherwise a groove-shaped lubricant passage 15b is formed in one part of the inner ring inside surface portion Mb so that the major diametric portion 13 and the grooves 12 are put in communication partially. The lubricant in the major diametric portion 13 is fed to the grooves 12 through the lubricant passage 15 using a pumping action etc., and the lubricant is fed from the grooves 12 to spiral grooves 11 so as to lubricate the inner ring inside surface Ma. COPYRIGHT: (C)2005,JPO&NCIPI
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