| 摘要 |
The large-end-face roughness sigma1 of the tapered roller is set to be not less than 0.04 mumRa, consequently the assembling torque becomes generally constant and smaller in fluctuation over a range that the cone-back rib face roughness sigma2 is 0.03-0.23 mumRa. Also, the composite roughness sigma=(sigma12+sigma22)½ is set to be not more than 0.17 mumRa, consequently the preload retention rate on the regression curve can be made 90%. Further, the radius of curvature ratio R1/R2 resulting from dividing the convex radius of curvature R1 of the large end face of the tapered roller by the concave radius of curvature R2 of the cone-back rib face of the inner ring is set to be not more than 0.35, consequently the rotating torque becomes smaller in variation and also smaller in fluctuations over a range that the composite roughness sigma is 0.05-0.22 mumRa.
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