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Double Row Cylindrical Roller Bearings
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Item # NNU4976
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Item # NNU4976, 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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Technical Specifications
Type
Cylindrical Roller Bearing
Bore Type
Cylindrical
Material
Hardened Alloy Steel
Cage Material
High Strength, 2 piece, Machined Brass
Limiting Speed - Oil
1200
RPM
Limiting Speed - Grease
1000
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
910000
lbf
4050000
N
4050.00
kN
Dynamic Load Rating
365000
lbf
1630000
N
1630.00
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
14.9606
in
380.000
mm
D
20.4724
in
520.000
mm
B
5.5118
in
140.000
mm
C
5.5118
in
140.000
mm
Fw
16.7323
in
425.000
mm
r
0.1575
in
4.000
mm
da min
15.5906
in
396.000
mm
db min
16.0630
in
408.000
mm
Da max
19.8425
in
504.000
mm
ras max
0.1181
in
3
mm
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