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NJ2300 Series


Cylindrical roller bearings provide the highest possible radial load capacity compared to other roller bearing types. Four primary styles are available to meet a variety of application requirements.
The rollers of Cylindrical roller bearings are a key component. Their geometry, the so-called logarithmic profile, provides an optimum stress distribution in the contact zones in the bearing. Their surface finish maximizes lubricant film formation and optimizes rolling motion of the rollers. The benefits derived from this compared with traditional designs include enhanced operational reliability and a greater insensitivity to misalignment.
One-row, or single-row, caged Cylindrical roller bearings are available in six primary designs. Inside and outside ring configurations vary to accommodate different application designs.
Two-row, or double-row, Cylindrical roller bearings offer added radial capacity over traditional one-row types.
Four-row Cylindrical roller bearings have an extremely high radial load capacity, but no thrust capacity. This bearing type is mostly used in roll neck and work roll applications in the metal rolling industry.
Full complement Cylindrical roller bearings meet the need for increased radial load carrying capacity by maximizing the number of rollers in a given envelope.
130
WGD Bearing No.
Boundary dimensions
Basic load rating(kN)
Limiting speeds
Mass
mm
Dynamic
Static
rpm
Kg
d
D
B
rs min
rs1 min
Cr
Cor
Grease
Oil
≈
NJ2304E
20
52
21
1.1
0.6
42
39
12,000
14,000
0.242
NJ2305E
25
62
24
1.1
1.1
57
56
9,700
11,000
0.386
NJ2306E
30
72
27
1.1
1.1
74.5
77.5
8,300
9,700
0.58
NJ2307E
35
80
31
1.5
1.1
99
109
7,200
8,500
0.78
NJ2308
40
90
33
1.5
1.5
82.5
88
7,000
8,200
0.951
NJ2308E
40
90
33
1.5
1.5
114
122
6,400
7,500
1.06
NJ2309
45
100
36
1.5
1.5
99
104
6,300
7,400
1.27
NJ2309E
45
100
36
1.5
1.5
137
153
5,700
6,800
1.41
NJ2310
50
110
40
2
2
121
131
5,700
6,700
1.7
NJ2310E
50
110
40
2
2
163
187
5,200
6,100
1.9
NJ2311
55
120
43
2
2
148
162
5,200
6,100
2.17
NJ2311E
55
120
43
2
2
201
233
4,700
5,600
2.37
NJ2312
60
130
46
2.1
2.1
169
188
4,800
5,700
2.71
NJ2312E
60
130
46
2.1
2.1
222
262
4,400
5,200
2.96
NJ2313
65
140
48
2.1
2.1
188
212
4,400
5,200
3.27
NJ2313E
65
140
48
2.1
2.1
248
287
4,100
4,800
3.48
NJ2314
70
150
51
2.1
2.1
223
262
4,100
4,800
3.98
NJ2314E
70
150
51
2.1
2.1
274
325
3,800
4,400
4.25
NJ2315
75
160
55
2.1
2.1
258
300
3,800
4,500
4.87
NJ2315E
75
160
55
2.1
2.1
330
395
3,500
4,100
5.25
NJ2316
80
170
58
2.1
2.1
274
330
3,600
4,200
5.79
NJ2316E
80
170
58
2.1
2.1
355
430
3,300
3,900
6.25
NJ2317
85
180
60
3
3
315
380
3,400
4,000
6.7
NJ2317E
85
180
60
3
3
395
485
3,100
3,700
7.16
NJ2318
90
190
64
3
3
325
395
3,200
3,800
7.95
NJ2318E
90
190
64
3
3
435
535
2,900
3,400
8.56
NJ2319
95
200
67
3
3
370
460
3,000
3,500
9.2
NJ2319E
95
200
67
3
3
460
585
2,700
3,200
9.8
NJ2320
100
215
73
3
3
410
505
2,900
3,400
11.7
NJ2320E
100
215
73
3
3
570
715
2,600
3,100
12.8
NJ2322
110
240
80
3
3
605
790
2,600
3,100
17.1
NJ2322E
110
240
80
3
3
675
880
2,400
2,800
19.4
NJ2324
120
260
86
3
3
710
920
2,400
2,800
21.5
NJ2324E
120
260
86
3
3
795
1,030
2,200
2,500
26.1
NJ2326
280
93
4
4
840
1,130
2,200
2,600
26.9
NJ2326E
130
280
93
4
4
920
1,230
2,000
2,300
30.9
NJ2328
140
300
102
4
4
920
1,250
2,000
2,300
33.8
NJ2328E
140
300
102
4
4
1,020
1,380
1,800
2,100
38.7

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