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Ball bearing

  • US 20020118900A1
  • Filed: 10/16/2001
  • Published: 08/29/2002
  • Est. Priority Date: 10/16/2000
  • Status: Active Grant
First Claim
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1. A ball bearing, comprising:

  • an inner race including on the outer peripheral surface thereof an inner race raceway having an arc-shaped section;

    an outer race including on the inner peripheral surface thereof an outer race raceway having an arc-shaped section;

    a plurality of balls rollably interposed between said inner race raceway and said outer race raceway; and

    , a retainer for rotatably holding said balls;

    wherein the ratio ri/D8 of the radius of curvature ri of said inner race raceway to the outside diameter D8 of said balls is set in the range from 0.51 to 0.54, the ratio re/D8 of the radius of curvature re of said outer race raceway to the outside diameter D8 of said balls is set in the range from 0.54 to 0.56, and an interior geometric clearance c is set at 13 μ

    m or less, said interior geometric clearance c being a value satisfying an equation of;

    c=D6

    D4

    2D8, where D4 is the diameter of the inner race raceway, D8 is the outside diameter of the balls, and D6 is the diameter of the outer race raceway.

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