Page 78 - Rollingbearings

B.2 Bearing type and arrangement
Adjusted bearing Floating bearing the shaft, e g a double helical gear Most
arrangements arrangements common bearings are:

• deep groove ball bearings (ig. 15)
In adjusted bearing arrangements, the shaft In loating bearing arrangements the shaft is • self­aligning ball bearings
is located axially in one direction by one cross­located, but is able to move axially a • spherical roller bearings (ig. 16)
bearing support and in the opposite direction certain distance between the two end posi­ • NJ design cylindrical roller bearings,
by the other (cross­located) Adjusted bearing tions, i e “loat” mirrored, with offset rings (ig. 17)
arrangements require proper adjustment of When determining the required “loat”
clearance or preload during mounting distance, consider thermal expansion of the
These bearing arrangements are gener­ shaft relative to the housing and tolerances
ally used for short shafts, where thermal of the components, which affect the distance
expansion has only a little effect The most between the two bearings
suitable bearings are: With this arrangement, the shaft can also
be axially located by other components on
• angular contact ball bearings (ig. 13)
• tapered roller bearings (ig. 14)

Fig. 13 Fig. 14
Adjusted bearing arrangement, angular contact ball bearings Adjusted bearing arrangement, tapered roller bearings arranged
arranged face-to-face back-to-back

Bearing type and arrangement

B.2

Fig. 15 Fig. 16
Floating bearing arrangement, deep groove ball bearings Floating bearing arrangement, spherical roller bearings

s/2 s/2 s/2 s/2

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