CYLINDRICAL
ROLLER BEARINGS
Linear contact
exists between the roller of the cylindrical roller bearing and the
tray with big radical load capacity . So it is suitable for high speed
rotating from the view of it structure. This kind of bearings include
all types of bearing, rollers guided by the inner or outer rings. |
|
|
Structure |
NU |
Shifting
bearings |
NJ |
Singledirectionalpositioned bearings |
NUP |
Positioned bearing |
N |
Shifting bearings |
NF |
Singledirectionalpositioned bearings |
SL0450...X |
Cylindrical roller bearings with stopping rings |
SL0450...PX |
Cylindrical roller bearings with stopping rings ,single face sealed |
SL0450...PPX |
Cylindrical roller bearings with stopping rings, double face sealed |
SL04...X |
Cylindrical roller bearings with stopping rings |
SL04...PX |
Cylindrical roller bearings with stopping rings, single face sealed |
SL04...PPX |
Cylindrical roller bearings with stopping rings , double face sealed |
The cylindrical roller bearings
of various structures are divided as per the different retaining edges. NU
type cylindrical roller bearings have two retaining edges on the outer ring
with non-retained inner ring. N type cylindrical roller bearings have two
retained inner rings with non-retained outer ring. Both NU and N types cylindrical
roller bearings are shifting bearings with separable inner and outer rings
for easy dismounting. NJ type bearings have double retained outer rings with
single retained inner ring. NF type bearings have double retained inner rings
with single retained outer rings. They can bear the single directional axle
force . NUP type cylindrical roller bearing is used as fixed bearing which
can bear the alternative directional axial force. Bearings of this type have
double retained outer ring with one retaining ring.
Re-enforced cylindrical roller bearing |
To distinguish
from the common cylindrical roller bearings, the re-enforce E cylindrical
roller bearings are marked with the suffix E. This E type bearings have the
same main dimensions as the common bearings except the increased diameter
, length , and numbered of the rollers. The load capacity is also enhanced
accordingly.
This type bearings
have big rational load. So as shown in Figure, when compared with the common
bearings of the same shaft diameter, the bearing outer diameter should be
reduced or the shaft diameter should be increased when the bearings with same
outer diameter are used so that the rigidity of the shaft can be enhanced.
|
Retainer |
Steel plate punched retainer or
entity retainer are used with cylindrical roller bearings are common used
for cylindrical roller bearings. But retainers made of fiber glass re-enforced
nylon 66 is also used for the temperature of - 20?200C, or for 1500C short
time operation.
Cylindrical roller bearings with stopping ring groove |
RTL-cylindrical roller bearings
SL04, 50 and SL 04 series , the bearings with single face or double face sealing
are positioning bearings of two line and full-rollers. A complete unit is
directly assembled with inner ring, rollers and outer ring. The cylindrical
rollers are guided by the inner retaining edge while there is a entity middle
retaining edge on the outer ring. There are two circle grooves on the outer
surface. It is easily positioned in axial direction with the stopping ring.
The seat width may be smaller than the width of the bearing so as to reduce
the axial directional space requirement.
Mounting |
The bearing groove will only stick to the shaft shoulder or the outer casing shoulder. It can not be clipped by the shaft or the chamfered angle of the outer casing. Therefore , the maximum radius of the combinative parts must be smaller than the minimum value of the chamfered angle of the cylindrical roller bearings. For the fitting of P or PP series bearings, the sealing rings must get enough support to prevent from being pushed out in re-lubricating. The separable inner ring must be clipped tightly in axial direction if there exit the axial direction force in operation. Meanwhile , for the tightly combined bearings bush ring, no mounting or dismounting forces are allowed to be transferred directly through rollers or retaining edges during mounting or dismounting.。