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Designs and variants

Single row cam rollers
  • are based on deep groove ball bearings in the 62 series (fig. 1)
  • have a thick-walled outer ring with its running surface crowned
  • are capped with a sheet steel reinforced NBR contact seal on both sides
  • are greased for the life of the bearing and cannot be relubricated (table 1)
When capped bearings must operate under certain conditions, such as very high speeds or high temperatures, some grease may leak. For bearing arrangements where this would be detrimental, appropriate actions should be taken.
Double row cam rollers
  • are based on double row angular contact ball bearings in the 32 dimension series (fig. 2)
  • have a thick-walled outer ring with its running surface available in two designs:
    • crowned as standard (series designation 3058.. C)
    • cylindrical (flat) (series designation 3057.. C)
  • have a 30° contact angle, enabling, together with the two ball sets, tilting moments to be accommodated
  • are supplied capped in two variants:
    • with a sheet steel shield on both sides that extends into a recess on the inner ring (designation suffix -2Z)
    • with an RS contact seal on both sides (designation suffix -2RS1)
  • are greased for the life of the bearing under normal operating conditions (table 1)
  • should be relubricated, if:
    • subjected to moisture or solid contaminants
    • they run for long periods at temperatures above 70 °C (160 °F)
  • have a lubrication hole in the inner ring
    • Where suitable ducts are provided in the pin, the bearings are easy to relubricate.
    • The grease should be applied slowly to avoid damaging the shields or seals.
When capped bearings must operate under certain conditions, such as very high speeds or high temperatures, grease may appear between the inner ring and capping device. For bearing arrangements where this would be detrimental, appropriate actions could be taken.
Cages

SKF cam rollers are fitted with one of the cages shown in table 2. Double row cam rollers are equipped with two cages.

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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