Page 388 - Rollingbearings

3 Angular contact ball bearings
Paired mounting Bearings with 25° contact SKF standard assortment
Paired mounting can be done in three ways angle (AC series) • bearings in the 32 A and 33 A series
(ig. 5): • bearings with a two-piece inner ring
• have a raceway geometry optimized for • capped bearings
high speeds • open bearings (that are also available
• Tandem arrangement • have reduced sensitivity to axial loading capped) that may have recesses in the ring
– is used where the load carrying capacity and misalignment, including the ability to side faces
of a single bearing is inadequate accommodate two times higher impact
– shares the radial and axial loads equally loads before edge stresses can occur Bearings in the 52 and 53 series are no
3 – has parallel load lines • are equipped with an optimized machined longer available and have been replaced with
– can accommodate axial loads in one
32 A and 33 A series bearings, which are
brass cage as standard
direction only dimensionally interchangeable Only size
If axial loads act in both directions, a Compared with bearings with 40° contact 3200 A is different, and has a width of
third bearing, adjusted against the angle, beneits include: 14 mm instead of 14,3 mm
tandem pair, must be added
• 20% higher limiting speeds
• Back-to-back arrangement • higher radial load carrying capacity (by Basic design bearings
– provides a relatively stiff bearing trading off lower axial load carrying
arrangement capacity) • have different tolerances and performance
– can accommodate tilting moments • increased robustness when used as the capabilities compared with SKF Explorer
– has load lines that diverge from the backup bearing in sets that are predom- bearings
bearing axis inantly loaded in one direction
– can accommodate axial loads in both
directions, but only by one bearing in Bearings with a two-piece
each direction inner ring
Double row angular
• Face-to-face arrangement contact ball bearings • incorporate a larger number of balls, and
– is less sensitive to misalignment but not have a larger contact angle, giving the
as stiff as a back-to-back arrangement bearing its high load carrying capacity,
– has load lines that converge towards the The design of SKF double row angular con- especially in the axial direction
bearing axis tact ball bearings (ig. 3, page 385) corres- • are separable in the 33 D series (ig. 6),
– can accommodate axial loads in both ponds to two single row angular contact ball i e the outer ring with ball and cage
directions, but only by one bearing in bearings arranged back-to-back, but takes assemblies can be mounted independently
each direction up less axial space They can accommodate of the inner ring halves
radial loads, axial loads in either direction • are non-separable in the 33 DNRCBM
and tilting moments Double row angular series (ig. 6)
contact ball bearings provide stiff bearing – have a snap ring groove with a snap ring
arrangements in the outer ring, enabling simple and
space-saving axial location in the
housing
Fig. 5 – have been designed speciically for cen-
Paired mounting trifugal pumps, but can also be used in
other applications

Fig. 6
Double row bearings with a two-piece
inner ring

Tandem Back-to-back Face-to-face
arrangement arrangement arrangement
33 D 33 DNRCBM

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