Page 251 - Rollingbearings

Designs and variants
Cages Matched bearings Back-to-back arrangement (designation 1
sufix DB)

Depending on their design, series and size, • are used where the load carrying capacity • has load lines that diverge towards the
SKF deep groove ball bearings are itted with of a single bearing is inadequate bearing axis
one of the cages shown in table 5 Double • are used where the shaft has to be located • provides a relatively stiff bearing
row bearings are equipped with two cages axially in both directions with a speciic arrangement
The standard stamped steel cage is not axial clearance • can accommodate tilting moments
identiied in the bearing designation If • where mounted immediately adjacent to • can accommodate axial loads in both
non­standard cages are required, check each other, distribute the load between directions, but only by one bearing in each
availability prior to ordering the bearings without having to use shims direction
When used at high temperatures, some or similar devices
lubricants can have a detrimental effect on Face-to-face arrangement (designation
polyamide cages For additional information A ‘V­shaped’ marking on the outside surface sufix DF)
about the suitability of cages, refer to Cages, of the outer rings of matched bearings • has load lines that converge towards the
page 187. (ig. 15) indicates how the pair should be bearing axis
mounted The bearing pairs are supplied as • is less sensitive to misalignment but not as
a packaged unit stiff as a back­to­back arrangement
Matched pairs can be supplied in three • can accommodate axial loads in both
different arrangements (ig. 16): directions, but only by one bearing in each
direction
Tandem arrangement (designation
sufix DT)
• is used where the load carrying capacity of
a single bearing is inadequate
• has parallel load lines and therefore
shares the radial and axial loads equally
• can accommodate axial loads in both
directions

Fig. 15 Fig. 16
‘V-shaped’ marking on matched bearings Matched bearings in different arrangements

DT DB DF

249