High Precision Ball Bearings - Kraftmek

Bearing arrangements
With the bearing arrangements listed below a large
number of applications can be realised.
DB arrangement
The contact lines diverge towards the bearing center
line:
• Large spread H and thus a high rigidity to resist tilting
moments
• Takes up axial loads in both directions
H
DF arrangement
The contact lines converge towards the bearing center
line:
• The spread H and the rigidity to resist tilting moments
are smaller
• This arrangement is less sensitive to angular
misalignment
As far as sustaining of loads and bearing deflection are
concerned, the DF arrangement behaves like the DB
arrangement.
H
DT arrangement
Two matched bearings are arranged in parallel in the
direction of the load:
• Can be subjected to larger axial loads in one direction
than a single bearing
• Both bearings must have the same contact angle and
be adjusted against a third bearing
The preload is generally obtained by the use of springs.
Note: Symbol in the diagram = face of the outer ring
and indicates the bearing arrangement
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