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Double Row Cylindrical Roller Bearings
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Double Row Cylindrical Roller Bearings
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Item # NNU4992K
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Item # NNU4992K, Double Row Cylindrical Roller Bearing w/ Tapered 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
Tapered
Material
Hardened Alloy Steel
Cage Material
High Strength, 2 piece, Machined Brass
Limiting Speed - Oil
950
RPM
Limiting Speed - Grease
800
RPM
Taper
1:12
Precision
ISO Class 0
Tolerance
ISO Class 0 (RBEC 1)
Oil Hole
w/o Oil Hole
Radial Internal Clearance
CN
Static Load Rating
1320000
lbf
5850000
N
5850.00
kN
Dynamic Load Rating
500000
lbf
2220000
N
2220.00
kN
Enclosure
Open
Operating Temperature Range
-40 to 250
ºF
-40 to 120
ºC
Dimensional Specifications
Double Row Cylindrical Roller Bearing w/ Tapered Bore - Type NNU - Dimensions
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d
18.1102
in
460.000
mm
D
24.4094
in
620.000
mm
B
6.2992
in
160.000
mm
C
6.2992
in
160.000
mm
Fw
20.1575
in
512.000
mm
r
0.1575
in
4.000
mm
da min
18.7402
in
476.000
mm
db min
19.2520
in
489.000
mm
Da max
23.7795
in
604.000
mm
ras max
0.1181
in
3
mm
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