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Series 72-Single Row Angular Contact Ball Bearings OEM/ODM

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Series 72-Single Row Angular Contact Ball Bearings

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  • Design Variants
  • Misalignment
  • Cage
  • Tolerance
  • Internal clearance
Model
 Dimensions Rated load C5(um) Extreme speed Weight
d
D
B
 r1,r2 Min r3,r4 Min Dynamic load Cr Static load Cor Grease lubrication Oil lubrication
7204C
20
47
14
 1 0.3 15.5 8.91 13000 18000 0.1
7204AC
20
47
14
 1 0.3 15 8.54 13000 18000 0.1
7204B
20
47
14
 1 0.6 13.4 7.65 13000 18000 0.11
7205C
25
52
15
 1 0.3 16.6 9.18 11000 16000 0.122
7205AC
25
52
15
 1 0.3 15.9 9.81 11000 16000 0.122
7205B
25
52
15
 1 0.6 14.6 9.3 11000 16000 0.13
7206C
30
62
16
 1 0.3 23 14.7 9000 13000 0.198
7206AC
30
62
16
 1 0.3 22.1 14.1 9000 13000 0.198
7206B
30
62
16
 1 0.6 20.4 13.4 9000 13000 0.20
7207C
35
72
17
 1.1 0.6 32.1 22 8000 11000 0.305
7207AC
35
72
17
 1.1 0.6 30.7 20.7 9000 12000 0.305
7207B
35
72
17
 1.1 0.6 27 18.3 8000 11000 0.3
7208C
40
80
18
 1.1 0.6 36.9 25.6 7500 10000 0.369
7208AC
40
80
18
 1.1 0.6 35.2 24.4 7500 10000 0.369
7208B
40
80
18
 1.1 0.6 32 23.2 7000 95000 0.37
7209C
45
85
19
 1.1 0.6 38.6 29 12000 17000 0.407
7209AC
45
85
19
 1.1 0.6 36.9 27.1 6700 9000 0.41
7209B
45
85
19
 1.1 0.6 36 26.5 6300 8500 0.41
7210C
50
90
20
 1.1 0.6 42.8 32 7600 10000 0.454
7210AC
50
90
20
 1.1 0.6 40.8 30.3 6300 8500 0.46
7210B
50
90
20
 1.1 0.6 37.5 28.5 6000 8000 0.47
7211C
55
100
21
 1.5 0.6 53 40 8000 10000 0.61
7211AC
55
100
21
 1.5 0.6 50.5 38.2 7100 10000 0.61
7211B
55
100
21
 1.5 1 46.5 36 5300 7000 0.64
7212C
60
110
22
 1.5 0.6 61 48.3 5300 7000 0.8
7212AC
60
110
22
 1.5 0.6 58.2 46 5300 7000 0.8
7212B
60
110
22
 1.5 1 56 44 4800 6300 0.8
7213C
65
120
23
 1.5 0.6 70 54.8 4800 6300 1
7213AC
65
120
23
 1.5 0.6 66.6 52.3 4800 6300 1
7213B
65
120
23
 1.5 1 64 53 4500 6000 1.0
7214C
70
125
24
 1.5 0.6 72.9 65 4500 6200 1.1
7214AC
70
125
24
 1.5 0.6 75.8 62 4500 6200 1.1
7214B
70
125
24
 1.5 1 69.5 58.5 4300 5600 1.1
7215C
75
130
25
 1.5 0.6 79.2 63.7 4300 5600 1.29
721 5AC
75
130
25
 1.5 0.6 78.8 67 4300 5600 1.2
7215B
75
130
25
 1.5 1 68 58.5 4000 5300 1.2
7216C
80
140
26
 2 1 92.8 83 4000 5300 1.45
7216 AC
80
140
26
 2 1 88.4 79 4000 5300 1.45
7216B
80
140
26
 2 1 80 69.5 3800 5000 1.5
7217C
85
150
28
 2 1 99.7 90 3800 5000 1.8
7217AC
85
150
28
 2 1 94.9 86 3800 5000 1.8
7217B
85
150
28
 2 1 90 80 3400 4500 1.9
7218C
90
160
30
 2 1 123 105 3600 4800 2.18
7218AC
90
160
30
 2 1 117 100 3600 4800 2.19
7218B
90
160
30
 2 1 106 93 3200 4300 2.4
7219C
95
170
32
 2.1 1.1 135 120 3400 4500 2.7
7219AC
95
170
32
 2.1 1.1 128 114 3400 4500 2.7
7219B
95
170
32
 2.1 1.1 116 100 3000 4000 3.1
7220C
100
180
34
 2.1 1.1 120 136 3000 4000 3.71
7220AC
100
180
34
 2.1 1.1 114 130 3000 4000 3.74
7220B
100
180
34
 2.1 1.1 100 114 3000 4000 4.0
7221BM
105
190
36
 2.1 1.1 143 129 2800 3800 4.4
7222CM
110
200
38
 2.1 1.1 142 171 2600 3600 5.03
7222ACM
110
200
38
 2.1 1.1 135 164 2600 3600 4.89
7222BM
110
200
38
 2.1 1.1 145 135 2600 3600 5.18
7224CM
120
215
40
 2.1 1.1 190 179 2400 3400 5.4
7224ACM
120
215
40
 2.1 1.1 146 184 2200 3200 6.04
7224BM
120
215
40
 2.1 1.1 193 262 2400 3400 6.13
7226ACM
130
230
40
 3 1.1 155 200 1900 2800 7.26
7226BM
130
230
40
 3 1.1 135 175 1900 2800 7.56
7226CM
130
230
40
 3 1.1 165 210 1900 2800 7.28
7228CM
140
250
42
 3 1.1 180 243 1800 2600 8.83
7228ACM
140
250
42
 3 1.1 170 237 1800 2600 8.71
7228BM
140
250
42
 3 1.1 147 207 1800 2600 8.59
7230ACM
150
270
45
 3 1.1 248 280 1700 2400 12.6
7230BM
150
270
45
 3 1.1 225 254 1700 2400 11.2
7232ACM
160
290
48
 3 1.1 263 305 1600 2200 14.5
7232CM
160
290
48
 3 1.1 279 324 1600 2200 14.5
7234CM
170
310
52
 4 1.5 295 360 1600 2200 18.3
7234ACM
170
310
52
 4 1.5 266 325 1600 2200 18.3
7236ACM
180
320
52
 4 1.5 244 399 1500 2000 18.7
7236CM
180
320
52
 4 1.5 256 418 1500 2000 18.7
7238BM
190
340
55
 4 1.5 284 375 1400 1900 22.5
7240ACM
200
360
58
 4 1.5 265 462 1300 1800 26.5
7240BM
200
360
58
 4 1.5 238 417 1300 1800 26.6
7244ACM
220
400
65
 4 1.5 325 605 1100 1600 37.5
7244BM
220
400
65
 4 1.5 370 530 1100 1600 37.1
7248BM
240
440
72
 4 1.5 322 626 1000 1500 52.3
7252BM
260
480
80
 5 2 507 780 900 1300 66
7256BM
280
500
80
 5 2 520 850 850 1200 69.5
7260BM
300
540
85
 5 2.1 553 930 850 1200 86.5
7264BM
320
580
82
 5 2 624 1120 750 1000 110
7280BM
400
720
103
 6 3 728 1500 600 800 190
7284BM
420
760
109
 7.5 4 695 1460 600 800 220

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 72-Single Row Angular Contact Ball Bearings Factory and OEM/ODM Series 72-Single Row Angular Contact Ball 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. Grease Lubrication: Enhancing Performance
Grease lubrication stands as a cornerstone in optimizing the performance and longevity of Series 72 angular contact ball bearings. Operating within a recommended limit of 13,000 revolutions per minute (RPM), grease lubrication offers a practical and efficient solution for a wide array of industrial applications. Grease composed of a base oil thickened with additives, serves as a lubricating medium that fills the clearances between bearing components. Its primary function is to reduce friction and wear by forming a protective film over the bearing surfaces, preventing direct metal-to-metal contact. This protective barrier not only facilitates smoother rotation but also enhances the bearing's resistance to contaminants and corrosion, thus prolonging its service life. The selection of the appropriate grease type is paramount to ensure optimal performance and reliability. Factors such as operating temperature, load conditions, and speed requirements influence the choice of grease viscosity and composition. Manufacturers often provide detailed recommendations and guidelines to assist users in selecting the most suitable grease for their specific application. Regular maintenance practices, including proper relubrication intervals and quantity control, are essential for sustaining the effectiveness of grease lubrication. Over-greasing can lead to increased operating temperatures and potential seal damage, while under-greasing may result in premature wear and inadequate lubrication.

2. Oil Lubrication: Maximizing Speed and Efficiency
In applications demanding higher speeds and performance thresholds, oil lubrication emerges as a preferred choice for Series 72 angular contact ball bearings. With an optimal limit of 18,000 RPM, oil lubrication offers superior cooling and flushing properties, making it particularly suitable for high-speed and high-temperature operating environments. Unlike grease lubrication, which relies on a semi-solid consistency to maintain lubricant within the bearing clearances, oil lubrication involves the continuous circulation of a liquid lubricant through the bearing assembly. This dynamic lubrication method not only ensures efficient heat dissipation but also facilitates the removal of contaminants and debris from the bearing surfaces, thereby minimizing the risk of premature wear and failure. Oil lubrication systems vary in complexity, ranging from simple oil bath or splash lubrication arrangements to sophisticated circulating oil systems equipped with filtration and cooling mechanisms. The selection of the appropriate oil viscosity, additives, and delivery system depends on factors such as operating conditions, bearing size, and environmental considerations. Regular monitoring of oil quality and replenishment intervals is crucial to maintaining optimal performance and reliability. Periodic oil analysis can help identify potential issues such as contamination, degradation, or excessive wear particles, allowing for timely corrective actions to be taken.