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Designs and variants

SKF supplies cylindrical roller thrust bearings in different series:

  • 811 and 812 series bearings (fig. 1) with one row of rollers
    They are mainly used in applications where thrust ball bearings do not have sufficient load carrying capacity.
  • 893 and 894 series bearings (fig. 2) with two rows of rollers
Single direction bearings

As standard, cylindrical roller thrust bearings are available as single direction bearings (fig. 1 and fig. 2) and can accommodate axial loads in one direction only.

Double direction bearings
  • can accommodate axial loads in both directions
  • can be created by combining two cylindrical roller and cage thrust assemblies and two bearing washers with an intermediate washer
    Depending on the design, an intermediate washer can be shaft or housing centred (fig. 3 and fig. 4).

Intermediate washers must have the same surface finish and hardness as bearing washers. SKF does not supply intermediate washers, but provides material specifications and dimensional data on request.

For additional information, refer to Design considerations.

Cylindrical roller and cage thrust assemblies

(prefix K, fig. 5)

  • can accommodate axial loads in one direction only
  • can be combined with washers in the WS, GS and LS series (→ Bearing washers
  • can be used without washers in applications where:
    • adjacent components can serve as raceways
    • bearing arrangements with a low axial section height are required
Bearing washers

SKF can supply the components of cylindrical roller thrust bearings also separately. Additional to cylindrical roller and cage thrust assemblies the included bearing washers are listed in the product tables:

Shaft washers (prefix WS, fig. 6)

  • are made of hardened carbon chromium bearing steel
  • raceway surfaces are precision ground
  • have a ground bore

Housing washers (prefix GS, fig. 7)

  • are made of hardened carbon chromium bearing steel
  • raceway surfaces are precision ground
  • have a ground outside surface

SKF recommends using both of these washers in high-speed applications where accurate centring of the bearing washers is required.

LS series universal washers

  • can be used as both shaft or housing washers for bearings in the 811 series
  • are used for applications where accurate centring of the bearing washers is not necessary
  • are used where low speeds are involved

For additional information about LS series washers, refer to Needle roller thrust bearings.

Cages

SKF cylindrical roller thrust bearings are fitted with one of the cages shown in table 1.

When used at high temperatures, some lubricants can have a detrimental effect on polyamide cages. For additional information about the suitability of cages, refer to Cages and Cage materials.

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