Bearing data

Dimension standardsBoundary dimensions: ISO 15:2011

For additional information (→ Tolerances)
When d ≤ 300 mm:
  • width tolerance at least 50% tighter than ISO standard (table 1)
  • P5 running accuracy

When d > 300 mm:
  • P5 running accuracy on request (designation suffix C08)

Values: ISO 492:2014 (table 2, table 3 and table 4)
Internal clearance

For additional information (→ Bearing internal clearance)
Check availability of C2, C3, C4 or C5 clearance classes
Values: ISO 5753-1:2009
Values are valid for unmounted bearings under zero measuring load, and with no axial displacement between the inner and outer rings.
Axial displacement of one bearing ring relative to the other gradually reduces the radial internal clearance.

A CARB bearing is often used together with a spherical roller bearing. The clearance in a CARB bearing prior to mounting is slightly greater than that in a corresponding spherical roller bearing in the same clearance class. An axial displacement of the inner ring relative to the outer ring of 6 to 8% of the bearing width reduces the operating clearance to approximately the same value as same-sized spherical roller bearings.
Misalignment (fig. 1)0,5°
For misalignment greater than 0,5°, contact the SKF application engineering service.
Misalignment greater than 0,5° increases friction and reduces bearing service life. The ability to accommodate misalignment when the bearing is stationary is also limited. For CARB bearings with a machined brass cage centred on the inner ring (designation suffix MB), misalignment should never exceed 0,5°.

Misalignment displaces the rollers axially, causing them to approach the side faces of the bearing rings. Therefore, possible axial displacement is reduced (→ Axial displacement).
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