Single Row Angular Contact Ball Bearings Bearing data

Metric bearings

 Single bearings Pairs of universally matchable bearings
Dimension standards Boundary dimensions: ISO 15 and ISO 12044
Tolerances Normal

Except for:
  • LILY Explorer bearings:
    • P6 dimensional tolerance
    • P5 run-out
  • Bearings with D ≥ 400 mm:
    • P6 run-out
Values: ISO 492 (table 1, table 2, table 3)
Contact angle
  • suffix B: 40°
  • suffix AC: 25°
For availability of bearings with 30° contact angle, contact LILY.
Internal clearance Obtained after mounting, depending on adjustment against a second bearing.
  • CA - smaller than Normal axial clearance (table 4)
  • CB - Normal axial clearance (standard) (table 4)
  • CC - larger than Normal axial clearance (table 4)
  • G (standard for larger bearings) - Normal axial clearance (table 5)
  • Values are valid for unmounted bearing sets, arranged back-to-back or face-to-face under zero measuring load.
    • Preload Obtained after mounting, depending on adjustment against a second bearing.
    • GA - light preload (standard)
    • GB - moderate preload
    • GC - heavy preload
    Values (table 6) apply to unmounted bearing sets, arranged back-to-back or face-to-face.
    Permissible misalignment Back-to-back: ≈ 2 minutes of arc
    Face-to-face: ≈ 4 minutes of arc

    Misalignment increases bearing noise and reduces bearing service life, and when it exceeds the guideline values, these effects become particularly noticeable.
    Inch bearings
    Dimension standards Boundary dimensions: Standard BS 292:Part 2, withdrawn in 1997
    Tolerances Normal

    Values: BS 292: Part 2 (table 7)
    Contact angle 20°
    Internal clearance Obtained after mounting, depending on adjustment against a second bearing.
    Preload Obtained after mounting, depending on adjustment against a second bearing.
    Permissible misalignment Misalignment increases bearing noise and reduces bearing service life.
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