Bearing data


Metric bearingsInch bearings
Dimension
standards

Boundary dimensions:
ISO 355

Bearings with designation prefix J:
ANSI/ABMA Standard 19.1

Boundary dimensions:
AFBMA Standard 19
(ANSI B3.19)
ANSI/ABMA Standard 19.2 has replaced the above standard, but does not include dimensions.

Tolerances
For additional
information
Tolerances
  • Normal
  • tighter geometrical tolerances for bearings with designation suffix CL7C
Bearings with designation prefix J:
ANSI/ABMA Standard 19.1

Check availability of tighter width tolerance to 6 X tolerance class (designation suffix CLN) or P5
Values:
ISO 492 (table 1, table 2, table 3
Check availability of CL3, CL0 or tighter width tolerance
Values: ANSI/ABMA Standard 19.2 (table 4)

Deviating width tolerances for cups and cones are identified by a designation suffix (table 5).
The inner ring with roller and cage assembly (cone) and outer ring (cup) with the same basic designation are interchangeable. The tolerance for the total abutment width T of the bearing is not exceeded if the cones and cups are interchanged.
Internal clearance
For additional
information
Bearing internal clearance
Obtained after mounting, depending on adjustment against a second bearing.
Preload
For additional
information
Bearing preload
Obtained after mounting, depending on adjustment against a second bearing.
Permissible
misalignment

SKF Explorer bearings:
≈ 2 to 4 minutes of arc

Where misalignment cannot be avoided, SKF recommends not to use standard design bearings.


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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