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Double Row Cylindrical Roller Bearings
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Item # NNU4996
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Item # NNU4996, Double Row Cylindrical Roller Bearing w/ Cylindrical Bore - Type NNU
The rollers in the NN type bearing are guided by the ribs of the inner ring.
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Unit of Measure:
Imperial
Metric
Both
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Technical Specifications
·
Dimensional Specifications
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Ordering Options
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Technical Specifications
Type
Cylindrical Roller Bearing
Bore Type
Cylindrical
Material
Hardened Alloy Steel
Cage Material
High Strength, 2 piece, Machined Brass
Limiting Speed - Oil
910
RPM
Limiting Speed - Grease
770
RPM
Precision
ISO Class 0
Configuration
Two
Tolerance
ISO Class 0 (RBEC 1)
Oil Hole
w/o Oil Hole
Radial Internal Clearance
CN
Static Load Rating
1330000
lbf
5900000
N
5900.00
kN
Dynamic Load Rating
515000
lbf
2280000
N
2280.00
kN
Enclosure
Open
Operating Temperature Range
-40 to 250
ºF
-40 to 120
ºC
Dimensional Specifications
Double Row Cylindrical Roller Bearing w/ Cylindrical Bore - Type NNU - Dimensions
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d
18.8976
in
480.000
mm
D
25.5906
in
650.000
mm
B
6.6929
in
170.000
mm
C
6.6929
in
170.000
mm
Fw
21.0236
in
534.000
mm
r
0.1969
in
5.000
mm
da min
19.6850
in
500.000
mm
db min
20.2362
in
514.000
mm
Da max
24.8031
in
630.000
mm
ras max
0.1575
in
4.000
mm
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