SKF - Rolling Bearings

Designs and variants
Bearings for vibratory applications
For vibratory applications, SKF supplies
spherical roller bearings with a cylindrical or
tapered bore and surface-hardened stamped
steel cages (series designations 223../VA405).
These bearings have the same dimensions and
performance characteristics as basic design
bearings, but have C4 radial internal clearance
as standard.
Bearings for vibratory applications are also
available with a PTFE coated cylindrical bore
(designation suffix VA406). These bearings are
manufactured to VA405 specifications, with
the exception of the bore. VA406 bearings are
intended for the non-locating bearing position
in vibratory applications with outer ring rotation.
The PTFE coating prevents fretting corrosion
between the shaft and the bearing
bore. Therefore, shafts do not require special
heat treatments or coatings.
All bearings are equipped with an annular
groove and three lubrication holes in the outer
ring.
Depending on their size, SKF spherical roller
bearings for vibratory applications are manufactured
to one of following designs († fig. 9):
• E/VA405 spherical roller bearings have two
surface-hardened stamped window-type
steel cages, an inner ring without flanges
and a guide ring centred on the inner ring or
on the cages.
• EJA/VA405 and CCJA/W33VA405 spherical
roller bearings have two surface-hardened
stamped window-type steel cages, an inner
ring without flanges and a guide ring centred
on the outer ring raceway.
Warning
PTFE coatings exposed to an open flame
or temperatures above 300 °C (570 °F)
are a health and environmental hazard!
They remain dangerous even after they
have cooled.
Read and follow the safety precautions
under Seal materials († page 155).
8
Fig. 9
E/VA405 design EJA/VA405 design CCJA/W33VA405 design
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