Page 700 - SKF-bearing-housings

Inch roller bearing units SYE, SYR, FYE and FYR series

SKF ConCentra locking method Fig. 3
The SKF ConCentra locking concept is based
on two sets of inclined planes (serrations): one
set in the bearing bore, the other on the
stepped sleeve. When the set (grub) screws in Set screw for mounting Set screw for dismounting
the mounting collar are tightened, the bearing
is displaced axially, forcing the inner ring to
expand. This does two things: it sets the cor-
rect internal clearance within the bearing and
it exerts pressure on the stepped sleeve, forc-
ing it to contract around the circumference of
the shaft for a true concentric, tight fit
(† fig. 3). On the opposite side are set (grub)
screws for dismounting. An engraving marked
“MOUNT.SIDE/DISMOUNT.SIDE” shows the
mounting and dismounting sides of the unit.
Locking collar method
The locking collar method uses a collar Fig. 4
mounted on the extended inner ring of the
bearing († fig. 4). The extended inner ring
has two holes, 62° apart. The collar has two
matching tapped holes, each containing a set
(grub) screw. When the set (grub) screws are
fully tightened, the shaft is held firmly against
the inner ring of the bearing.

Features and benefits
SKF roller bearing units share some of the fol-
lowing features and benefits:
Ready-to-mount
SKF roller bearing units are assembled,
greased and ready-to-mount, saving time and
reducing the risk of contaminating or damag-
ing the bearing during installation. Fig. 5
Simple mounting
The bearing units can be used with commer-
cial grade shafts and are located easily on the
shaft by tightening the set (grub) screws in the
mounting collar or locking collar.
Stiff housing
The housing base is reinforced with ribs and
the area around the attachment bolt holes is
strengthened to minimize the risk of cracking
caused by over-tightening the attachment
bolts († fig.5).

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