Bearing data

Metric bearings
Dimension
standards
Boundary dimensions: ISO 15:2011
Snap rings and grooves: ISO 464:1995
Tolerances

For additional
information
(→ Tolerances)
Normal
P6 or P5 on request

Except for:
  • SKF Explorer and SKF E2 bearings:
    • Dimensional accuracy to P6 and reduced width tolerance:
      D ≤ 110 mm → 0/ –60 μm
      D > 110 mm → 0/ –100 μm
    • Running accuracy
      D ≤ 52 mm → P5
      52 mm < D ≤ 110 mm → P6
      D > 110 mm → Normal tolerances

Values: ISO 492:2014 (table 1, table 2, table 3)
Internal
clearance


For additional
information
(→ Bearing internal clearance)
Single bearings
Normal
Check availability of C2, C3, C4, C5, reduced ranges of standard clearance classes or partitions of adjacent classes.

Except for:
  • SKF E2 bearings:
    C3
    Check availability of other clearance classes

Values: ISO 5753-1:2009 (table 4)
Values are valid for unmounted bearings under zero measuring load.

Matched bearing pairs
Supplied either with clearance or preload:
  • CA – small axial internal clearance
  • GA – light preload
Values: (table 5)
Values are valid for unmounted bearing sets under zero measuring load.
MisalignmentSingle bearings
≈ 2 to 10 minutes of arc

The permissible angular misalignment between the inner and outer rings depends on the size and internal design of the bearing, the radial internal clearance in operation and the forces and moments acting on the bearing. As a result, only approximate values are listed here. Any misalignment increases bearing noise and reduces bearing service life.

Matched bearing pairs
The permissible angular misalignment between the inner and outer rings depends on the size and internal design of the matched set, the radial/axial internal clearance or preload in operation and the forces and moments acting on the set.  Any misalignment increases bearing noise and reduces bearing service life. For additional information, contact the SKF application engineering service.
Inch bearings
Dimension
standards
BS 292-2:1982, withdrawn in 1997
Tolerances

For additional
information
(→ Tolerances)
Normal
Values: BS 292-2:1982, withdrawn in 1997, (table 6)
Internal
clearance


For additional
information
(→ Bearing internal clearance)
Normal
Values: ISO 5753-1:2009, (table 4)
Values are valid for unmounted bearings under zero measuring load.
Misalignment≈ 2 to 10 minutes of arc

The permissible angular misalignment between the inner and outer rings depends on the size and internal design of the bearing, the radial internal clearance in operation and the forces and moments acting on the bearing. As a result, only approximate values are listed here. Any misalignment increases bearing noise and reduces bearing service life.
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