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SKF CARB Bearings

SKF CARB toroidal roller bearings are uniquely designed to accommodate misalignment and axial displacement in a single bearing, while carrying very high radial loads. They combine features of spherical and cylindrical roller bearings, making them ideal as non‑locating bearings in demanding industrial applications.

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What is an SKF CARB bearing?

SKF CARB toroidal roller bearing

Before the introduction of the SKF CARB Bearing, or toroidal roller bearing, almost every bearing arrangement was a compromise, due to ever present misalignment and axial displacement. Combining the self-aligning properties of the spherical roller bearing with the ability to accommodate axial displacement like a cylindrical or needle roller bearing, the SKF CARB toroidal roller bearing is now a proven and effective bearing solution for non-locating bearing positions.

CARB bearings can also have a compact cross section in conjunction with the high load carrying capacity normally associated with needle roller bearings.

The CARB bearing has the following benefits:

  • Reduced maintenance
  • High operation reliability
  • Long service life
  • High load carrying capacity
  • Lower operating costs
  • Compact design
  • Enhanced performance
  • High power density

Typical industrial fan reference stories

  • Every year a critical fan showed extremely high vibration levels due to bearing failures in the drive side of the blower. The CARB/spherical roller bearing self-aligning solution delivered real benefits, increasing MTBF from 1 to 5 years.
  • A malting plant experienced imbalance problems and repeated failures of the locating bearing in a fan with a vertical shaft. The non-locating position was upgraded to CARB with exceptional results.
  • A global producer of large electric motors used CARB on a multi splined shaft. Due to temperature gradients, significant sliding occurred between the non-locating spherical roller bearing and the housing. The introduction of CARB eliminated this issue.

SKF CARB Bearings FAQs

What is a CARB bearing and how is it different from a spherical roller bearing?

A CARB bearing is a toroidal roller bearing that can accommodate axial displacement and misalignment in one bearing. A spherical roller bearing can accommodate misalignment, but not significant axial displacement within the bearing – axial movement must occur between the bearing and housing. CARB bearings are therefore ideal as non‑locating bearings in combination with a locating bearing.

What information do I need to specify a CARB bearing correctly?

Helpful information includes:

  • Shaft diameter and housing dimensions
  • Radial load (and any axial load to be carried by the locating bearing)
  • Expected shaft expansion/axial movement
  • Required speed and operating temperature range
  • Existing bearing types and arrangement (if upgrading)

With this data, we can recommend the correct SKF CARB bearing and suitable locating bearing partner.

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