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Series N-Single Row Cylindrical Roller Bearings OEM/ODM

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Series N-Single Row Cylindrical Roller Bearings

  • NJ
  • NU
  • N
  • NUP
  • NJ+HJ
CONTACT US
  • Design Variants
  • Misalignment
  • Cage
  • Tolerance
  • Internal clearance
Model Dimensions Rated load Extreme speed Bearing dimensions Oblique retaining ring Weight
d D B r1 r2 min r3 r4 min S ≈ Dynamic load dyn cr Static load stat cor Grease lubrication Oil lubricationoil E F d1 ≈ D1 ≈ B2 B3 Bearings Oblique retaining ring
N202E
15
35
11
 0.6 0.3 1 12.7 10.4 18000 22000 30.3 - 21.8 -- -- -- 0.047 --
N203E
17
40
12
 0.6 0.3 1.2 17.6 14.6 15000 18000 35.1 -- 24.7 -- -- -- 0.068 --
N204E
20
47
14
 1 0.6 1 27.5 24.5 13000 16000 41.5 -- 29.9 -- -- -- 0.132 --
N304E
20
52
15
 1 0.6 1.1 31.5 27 11000 14000 45.5 -- 31.4 -- -- -- 0.151 --
N205E
25
52
15
 1 0.6 1.3 29 27.5 12000 15000 46.5 -- 34.9 -- -- -- 0.14 --
N305E
25
62
17
 1.1 1.1 1.5 41.5 37.5 9500 12000 54 -- 38.3 -- -- -- 0.245 --
N206E
30
62
16
 1 0.6 1.4 39 37.5 9500 12000 55.5 - 41.4 -- -- -- 0.21 --
N306E
30
72
19
 1.1 1.1 1.9 51 48 8500 10000 62.5 -- 45.1 -- -- -- 0.37 --
N406M
30
90
23
 1.5 1.5 2.3 71 64 7000 8500 73 -- 50.5 -- -- -- 0.87 --
N207E
35
72
17
 1.1 0.6 1.7 50 50 8500 10000 64 -- 48 -- -- -- 0.305 --
N307E
35
80
21
 1.5 1.1 1.7 64 63 7500 9000 70.2 -- 51.2 -- -- -- 0.485 --
N407M
35
100
25
 1.5 1.5 2.6 75 69.5 6300 7500 83 -- 59 -- -- -- 1.05 --
N208E
40
80
18
 1.1 1.1 1.9 53 53 7500 9000 71.5 -- 54.1 -- -- -- 0.38 --
N308E
40
90
23
 1.5 1.5 2.5 81.5 78 6300 7500 80 -- 57.7 -- -- -- 0.65 --
N408M
40
110
27
 2 2 2.6 93 86.5 5500 6800 92 -- 64.8 -- -- -- 1.3 --
N209E
45
85
19
 1.1 1.1 1.9 61 63 7000 8500 76.5 -- 59.1 -- -- -- 0.5 --
N309E
45
100
25
 1.5 1.5 2.9 98 100 5600 6700 88.5 -- 64.6 -- -- -- 1 --
N409M
45
120
29
 2 2 2.9 106 100 5000 6000 100.5 -- 71.8 -- -- -- 1.7 --
N210E
50
90
20
 1.1 1.1 2.2 64 68 6700 9500 81.5 -- 64.1 -- -- -- 0.6 --
N310E
50
110
27
 2 2 3 110 124 5300 6300 97 -- 71.4 -- -- -- 0.12 --
N410M
50
130
31
 2.1 2.1 3 129 125 4500 5300 110.8 -- 78.8 -- -- -- 2.1 --
N211E
55
100
21
 1.5 1.1 1.7 83 95 6000 7000 90 -- 71 -- -- -- 0.75 --
N311E
55
120
29
 2 2 3 134 140 4800 5600 106.5 -- 77.7 -- -- -- 1.6 --
N411M
55
140
33
 2.1 2.1 3.3 140 137 4300 5000 117.2 -- 85.2 -- -- -- 2.5 --
N212E
60
110
22
 1.5 1.5 1.6 95 104 5300 6300 100 -- 77.7 -- -- -- 1 --
N312E
60
130
31
 2.1 2.1 3 150 156 4300 5000 115 -- 84.5 -- -- -- 1.9 --
N412M
60
150
35
 2.1 2.1 3.4 166 170 4000 4800 127 -- 91.8 -- -- -- 3.1 --
N213E
65
120
23
 1.5 1.5 1.4 108 120 5000 6000 108.5 -- 84.6 -- -- -- 1.05 --
N313E
65
140
33
 2.1 2.1 1.4 180 190 4000 4800 124.5 -- 90.7 -- -- -- 2.3 --
N413M
65
160
37
 2.1 2.1 3.5 183 186 3800 4500 135.3 -- 98.5 -- -- -- 3.8 --
N214E
70
125
24
 1.5 1.5 1.1 120 137 4500 5300 113.5 -- 89.6 -- -- -- 1.15 --
N314E
70
150
35
 2.1 2.1 1.6 204 220 3800 4500 113 -- 97.5 -- -- -- 2.8 --
N414M
70
180
42
 3 3 4 224 232 3400 4000 152 -- 110.3 -- -- -- 5.5 --
N215E
75
130
25
 1.5 1.5 1.2 132 156 4500 5300 118.5 -- 94.5 -- -- -- 1.25 --
N315E
75
160
37
 2.1 2.1 1.8 240 265 3400 4000 143 -- 104.3 -- -- -- 3.4 --
N415M
75
190
45
 3 3 4.5 260 270 3200 3800 160.5 -- 116 -- -- -- 6.45 --
N216E
80
140
26
 2 2 1.2 140 170 4000 4800 127.3 -- 101.7 -- -- -- 1.54 --
N316E
80
170
39
 2.1 2.1 2.8 155 275 3200 3800 151 -- 110.6 -- -- -- 3.95 --
N416M
80
200
48
 3 3 4.6 300 310 3000 3600 170 -- 122 -- -- -- 8.3 --
N217E
85
150
28
 2 2 2 163 193 3800 4500 136.5 -- 107.6 -- -- -- 1.9 --
N317E
85
180
41
 3 3 3 270 300 3000 3600 160 -- 118 -- -- -- 5.3 --
N417M
85
210
52
 4 4 5 335 355 2800 3400 177 -- 126 -- -- -- 9.8 --
N218E
90
160
30
 2 2 1.4 183 216 3600 4300 145 -- 114.5 -- -- -- 2.4 --
N318E
90
190
43
 3 3 3 315 345 2800 3400 169.5 -- 124 -- -- -- 5.4 --
N418M
90
225
54
 4 4 5 365 390 2600 3200 191.5 -- 137 -- -- -- 11.5 --
N219E
95
170
32
 2.1 2.1 1.4 220 265 3200 3800 154.5 -- 120.7 -- -- -- 2.8 --
N319E
95
200
45
 3 3 3.5 335 380 2800 3400 177.5 -- 132.2 -- -- -- 6.3 --
N419M
95
240
55
 4 4 5.2 390 430 2400 3000 201.5 -- 147 -- -- -- 13.8 --
N220E
100
180
34
 2.1 2.1 1.4 250 305 3200 3800 163 -- 127.3 -- -- -- 3.44 --
N320E
100
215
47
 3 3 3.5 380 425 2600 3200 191.5 -- 139.6 -- -- -- 7.7 --
N420M
100
250
58
 4 4 5.7 440 490 2400 3000 211 -- 153.5 -- -- -- 15.8 --
N221E
105
190
36
 2.1 2.1 1.4 260 320 3000 3600 171.5 -- 134.7 -- -- -- 4.1 --
N321E
105
225
49
 3 3 3.4 335 380 3000 3600 195 -- 147 -- -- -- 9.1 --
N222E
110
200
38
 2.1 2.1 1.4 290 365 2800 3400 180.5 -- 141.6 -- -- -- 4.9 --
N322E
110
240
50
 3 3 4 415 475 2400 3000 211 -- 155.9 -- -- -- 10.5 --
N224E
120
215
40
 2.1 2.1 3.5 335 610 2200 2800 195.5 -- 153.5 -- -- -- 5.7 --
N324E
120
260
55
 3 3 4.5 520 600 2600 2800 230 -- 168.7 -- -- -- 15.2 --
N226E
130
230
40
 3 3 3.6 360 450 2400 3000 209.5 -- 1642 -- -- -- 6.5 --
N326E
130
280
58
 4 4 4.5 570 670 2000 2600 247 -- 182.3 -- -- -- 16.5 --
N228E.M
140
250
42
 3 3 3.7 390 510 2400 3000 225 -- 180 -- -- -- 9.5 --
N328E
140
300
62
 4 4 5.2 670 800 1900 2400 264 -- 195.5 -- -- -- 22.5 --
N230E.M
150
270
45
 3 3 4 440 585 2200 2800 -- 181.5 -- -- -- -- 22.9 --
N330E.M
150
320
65
 4 4 5.5 800 1000 1800 2200 -- 182 193.7 231.8 -- -- 19.5 --
N232E.M
160
290
48
 3 3 4.1 500 670 2000 2600 259 -- 207.4 -- -- -- 14.6 --
N332E
160
340
68
 4 4 5.5 865 1060 1600 1900 300 -- 222.2 -- -- -- 32.3 --
N332M
160
340
68
 4 4 -- 705 995 1500 1800 -- -- -- -- -- -- -- --
N2332M
160
340
114
 4 4 -- 1080 1650 1500 1800 -- -- -- -- -- -- -- --
N234E.M
170
310
52
 4 4 4.3 585 780 1800 2200 279 -- 220.8 -- -- -- 18.2 --
N334E.M
170
360
72
 4 4 7 800 1020 1600 1900 310 -- 238 -- -- -- 38 --
N236E.M
180
320
52
 4 4 4.5 610 830 1800 2200 289 -- 230.2 -- -- -- 18.9 --
N336M
180
380
75
 4 4 6.9 900 1160 1500 1800 328 -- 252 -- -- -- 44 --
N238E.M
190
340
55
 4 4 4.7 680 930 1700 2000 360 -- 244.6 -- -- -- 22.8 --
N338M
190
400
78
 5 5 -- 975 1260 1200 1500 -- 245 265 324.3 -- -- 85.8 --
N240E.M
200
360
58
 4 4 5 750 1040 1600 1900 323 -- 258.2 -- -- -- 26.9 --
N2240EM
200
360
98
 4 4 -- 1220 1870 1500 1800 325 -- -- -- -- -- 44.9 --
N2340M
200
420
138
 5 5 -- 1620 2640 1200 1500 364 -- -- -- -- -- 94.5 --
N244M
220
400
65
 4 4 -- 760 1200 1500 1800 350 -- -- -- -- -- 36.7 --
N2344M
220
460
145
 5 5 -- 1780 2620 1000 1300 407 -- -- -- -- -- 114 --
N348M
240
500
95
 5 5 -- 1400 2200 1000 1300 430 -- -- -- -- -- 95.6 --
N28/710M
710
870
95
 4 4 -- 1870 4650 530 630 831 -- -- -- -- -- 130 --
N28/1060
1060
1280
128
 6 6 -- 3450 10200 -- -- 1225 -- -- -- -- -- 360 --
N28/1120
1120
1360
140
 6 6 -- 3880 10200 -- -- 1296 -- -- -- -- -- 456 --
N39/1180
1180
1540
272
 7.5 7.5 -- 10800 27800 -- -- 1466 -- -- -- -- -- 1400 --
N20/1250
1250
1750
290
 9.5 9.5 -- 12600 30200 -- -- 1635 -- -- -- -- -- 2320 --
N30/1320
1320
1850
400
 12 12 -- 20400 52200 -- -- 1737 -- -- -- -- -- 3550 --
N28/1400
1400
1700
175
 7.5 7.5 -- 6600 18300 -- -- 1637 -- -- -- -- -- 860 --

Ningbo DHK Precision Bearing Co., Ltd.

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    Years Experience Working

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    Customer Service

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    Patented Technology

Ningbo DHK Precision Bearing Co., Ltd. (“DHK” for short) is a specialist enterprise engaged in the R&D, manufacture and sales of bearings. Is a famous China Series N-Single Row Cylindrical Roller Bearings Factory and OEM/ODM Series N-Single Row Cylindrical Roller Bearings Company. And is located in Ningbo Zhenhai Economic Development Zone with convenient transportation. Since the establishment for over a decade, "technology", "quality" and "service" have always been the initial issues in our mind for the sake of development. We provide reliable products and special customized services for global enterprises in heavy industry and have got the Satisfaction and won good reputation of a number of enterprises at home and abroad.

DHK mainly produces cylindrical roller bearings, conical roller bearings, self-aligning roller bearings, ball bearings, as well as various kinds of non-standard bearings and bearings with specially treated surface. So far, DHK’s bearings have been widely applied in such fields as engineering machinery, industrial pump, machine tool, compression engine, gear case, wind power and metallurgy in developed European and American countries.

DHK has the measuring room and inspection room of bearings in the industry and has introduced top-end inspection equipment worldwide and established the QC system in China,thus guaranteeing product quality in an all-round way.

Ningbo DHK Precision Bearing Co., Ltd.

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CERTIFICATE

DHK has passed IATF16949 quality system certification and ISO14001 environmental management system certification；and DHK is a national high-tech enterprise.

  • Certificate
  • Environmental Managementsystem Certificate
  • Occupational Health And Safetymanagement System Certificate
  • Measurement Management System
  • Invention patent1
  • Invention patent2
  • Invention patent3
  • High-tech enterprises

Latest News

Industry Knowledge Expansion

1. Understanding Series N Bearings
Series N single row cylindrical roller bearings are meticulously designed components engineered to meet the demands of high-performance applications. The defining characteristic of Series N bearings is their configuration, which features two integral flanges on the inner ring and no flanges on the outer ring. This unique arrangement not only facilitates axial displacement within the bearing housing but also provides essential support for radial loads. The presence of integral flanges on the inner ring serves multiple purposes. Firstly, it enables the bearing to accommodate axial displacement, allowing for thermal expansion, mounting errors, or shaft deflections without compromising performance. This axial displacement capability is particularly advantageous in applications where precise alignment is challenging or where dynamic operating conditions are prevalent. The absence of flanges on the outer ring streamlines the bearing's design while maintaining structural integrity. This minimalist approach reduces unnecessary complexity and weight, enhancing the bearing's efficiency and performance. The lack of outer ring flanges simplifies installation and maintenance procedures, contributing to overall ease of use and reliability.

2. Enhanced Axial Displacement
Series N bearings excel in facilitating axial displacement, a crucial feature in applications where shaft movement or misalignment is common. The integral flanges on the inner ring provide a stable reference point for axial movement within the bearing housing, ensuring smooth operation and minimizing the risk of damage due to excessive loads or misalignment. The ability to accommodate axial displacement offers several benefits. Firstly, it reduces the risk of premature wear and damage by allowing the bearing to compensate for thermal expansion or contraction during operation. This capability enhances the bearing's longevity and reliability, minimizing maintenance requirements and downtime. Axial displacement capability enables Series N bearings to tolerate misalignment between shafts, housings, or mounting surfaces. This flexibility is invaluable in dynamic environments where precise alignment may be challenging to achieve or maintain. By accommodating axial movement, Series N bearings ensure optimal performance and longevity in a variety of operating conditions.