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Double Row Cylindrical Roller Bearings
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Double Row Cylindrical Roller Bearings
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NF200 Series
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RNU Series
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Track Roller Bearing
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Double Row Cylindrical Roller Bearings
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Double Row Cylindrical Roller Bearings
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Bearing NO.
Boundary dimensions(mm)
Basic load ratings(kN)
Limiting speed(rpm)
Abutment and fillet dimensions(mm)
Weight (kg)
Cylindrical bore
Tapered bore
d
D
B/C
r 1.2min
r3.4min
Cr
Cor
Speed Ratings
da max
Da max
ra max
rb max
Refer
NN3920
NN3920K
100
140
30
1.1
1.1
106
182
6300
109
131
1
1
1.32
NNU4920
NNU4920K
100
140
40
1.1
1.1
128
255
6300
111
133.5
1
1
1.9
NN4920
NN4920K
100
140
40
1.1
1.1
128
255
6300
109
131
1
1
1.76
NNUB4920-70
-
100
140
70/40
1.1
1.1
128
255
4800
111
133.5
1
1
2.5
NNUB4920-80
-
100
140
80/40
1.1
1.1
128
255
4800
111
133.5
1
1
2.65
NN3020
NN3020K
100
150
37
1.5
1.5
151
250
6000
111
142
1.5
1.5
2.2
NN3120
-
100
165
52
1.1
1.1
234
360
3600
109
155
1
1
4.38
NNU3120
-
100
165
52
2
2
234
360
3600
112
152
2
2
4.39
NNU4120
NNU4120K30
100
165
65
2
2
358
570
3600
114
155
2
2
5.5
NNU4921
NNU4921K
105
145
40
1.1
1.1
130
260
6000
116
138.5
1
1
2
NN4921
-
105
145
40
1.1
1.1
130
260
6000
114
136
1
1
2
NNU3021
NNU3021K
105
160
41
2
2
190
305
5600
-
150
2
2
2.8
NN3021
NN3021K
105
160
41
2
2
190
305
5600
117
147
2
2
2.88
NNU4121
NNU4121K30
105
175
69
2
2
413
670
3400
120
165
2
2
6.7
NN3922
NN3922K
110
150
30
1.1
1.1
114
207
6000
119
141
1
1
1.41
NNU4922
NNU4922K
110
150
40
1.1
1.1
132
270
6000
121
143.5
1
1
2.05
NN4922
NN4922K
110
150
40
1.1
1.1
132
270
6000
119
141
1
1
2.1
NNUB4922
-
110
150
55/40
1.1
1.1
132
270
4500
121
143.5
1
1
2.4
NN3022
NN3022K
110
170
45
2
2
220
360
5300
-
160
2
2
3.55
NNU3022
-
110
170
45
2
2
220
360
5300
122
157
2
2
3.74
NN3122
-
110
180
56
1.1
1.1
290
450
3200
119
170
1
1
5.4
NNU4122
NNU4122K30
110
180
69
2
2
418
710
3200
125
170
2
2
6.95
NN3924
NN3924K
120
165
34
1.1
1.1
138
251
5300
130
155
1
1
2.02
NNU4924
NNU4924K
120
165
45
1.1
1.1
176
340
5300
133
158.5
1
1
2.8
NN4924
NN4924K
120
165
45
1.1
1.1
176
340
5300
130
155
1
1
2.87
NN3024
NN3024K
120
180
46
2
2
229
390
5000
-
170
2
2
3.85
NNU3024
-
120
180
46
2
2
229
390
5000
132
167
2
2
4.07
NN3124
NN3124K
120
200
62
2
2
355
550
3000
132
167
2
2
7.72
NNU4124
NNU4124K30
120
200
80
2
2
523
865
3000
137
190
2
2
11
NNUB4224X2-130
-
120
215
130/100
2×60°
1.1
704
1120
2200
137
209.5
1
1
15.5
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