| 摘要 |
PROBLEM TO BE SOLVED: To provide a four-row tapered roller bearing for work rolls of a steel rolling mill, having outer ring raceway surfaces of higher strength, with excellent durability and causing no misalignment when installing to a housing. SOLUTION: In the four-row tapered roller bearing 1 for the work rolls of the steel rolling mill, outer rings 10 each formed with the single row of outer ring raceway surface 10a on the inner peripheral face and inner rings 11 each formed with two rows of inner ring raceway surfaces on the outer peripheral face are arranged oppositely so that the outer rings 10 form four rows and the inner rings 11 form two rows, and a plurality of tapered rollers 12 are held for rolling between the outer ring raceway surfaces 10a and the inner ring raceway surfaces. An angleθformed in the cross section in the axial direction of the outer ring 10 between a tangential line drawn from an intersecting point of the outer ring raceway surface 10a with the small diameter side end face of the tapered roller 12 to a metal flow on the side closest to the surface of the outer ring raceway surface 10a and a tangential line of the outer ring raceway surface 10a is not smaller than 0°and not larger than 60°. COPYRIGHT: (C)2011,JPO&INPIT
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