Page 250 - Y-bearing-units

SKF ConCentra ball bearings and units

SKF ConCentra ball bearings and units († fig. 1) Fig. 1
are part of SKF’s extensive line of ready-to-
install mounted products. SKF ConCentra ball
bearings and units, with true concentric location
on the shaft, are particularly well suited for
applications where there are relatively high
speeds and moderate loads and where vibra-
tion, low noise, and minimal maintenance are
key operational parameters. SKF ConCentra ball
bearings are available as single bearings or
assembled with plummer block or flanged
housings.
What sets the SKF ConCentra ball bearing
unit apart from any other Y-bearing unit is its
unique 360° locking mechanism. The locking
mechanism is based on two mating surfaces,
each with precision engineered inclined serra-
tions. One set of serrations is machined into the
bearing bore; the other set is machined into the Fig. 2
outside diameter of the shaft sleeve. The shaft
sleeve is also equipped with a mounting pres-
sure ring († fig. 2).
The 360° grip on the shaft virtually eliminates
the possibility of shaft damage and fretting
corrosion.
By tightening the grub (set) screws in the
mounting collar using the appropriate hexago-
nal key, the bearing inner ring is forced up the
inclined planes of the stepped sleeve, thus pro-
viding a true concentric tight fit on the shaft
(† fig. 3).
In order to assist the mounting of SKF
ConCentra ball bearing units, mounting kits are
available from SKF (designation 626830) which
include mounting instructions, hexagonal keys
and torque indicators. Typical applications of
SKF ConCentra ball bearings and units are Fig. 3
industrial fans, conveyor systems, textile
machines and agricultural machinery.

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