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Series 31300-Single Row Tapered Roller Bearings OEM/ODM

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Series 31300-Single Row Tapered Roller Bearings

  • Metric Series
  • Inch series
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  • Design Variants
  • Cage
  • Tolerance
  • Internal clearance
Model Dimensions Extreme speed Rated load Calculation factor Abutment and fillet dimensions(mm) Weight [kg]
DIN720
 ISO355
d
D
B
 C T r1,r2 min  r3,r4 min a Grease lubrication Oil lubrication Dynamic load Static load e Y Yo Da max db min da min Db min Ca min Cb min
31305
 T7FB025
25
62
17
 13 18.25 1.5 1.5 20 6300 8500 38 39 0.83 0.73 0.4 34 32 47 59 3 5 0.28
31306
 T7FB030
30
72
19
 14 20.75 1.5 1.5 24 5300 7000 45.5 47.5 0.83 0.7 0.4 40 37 55 68 3 6.5 0.41
31307
 T7FB035
35
80
21
 15 22.75 2 2 26 4800 6300 60 65.5 0.83 0.73 0.4 44 44 62 76 4 7.5 0.54
31308
 T7FB040
40
90
23
 17 25.25 2 1.5 30 4000 5300 76.5 83 0.83 0.73 0.4 51 49 71 86 4 8 0.75
31309
 T7FB045
45
100
25
 18 27.25 2 1.5 32 3400 4500 96.5 110 0.83 0.73 0.4 56 54 79 95 4 9 1
31310
 T7FB050
50
110
27
 19 29.25 2.5 2 35 3200 4300 112 127 0.83 0.73 0.4 62 60 87 104 4 10 1.4
31311
 T7FB055
55
120
29
 21 31.5 2.5 2 39 2800 3800 125 140 0.83 0.73 0.4 68 65 94 113 4 10.5 1.6
31312
 T7FB060
60
130
31
 22 33.5 3 2.5 41 2600 3600 145 170 0.83 0.73 0.4 73 72 103 123 5 11.5 1.9
31313
 T7GB065
65
140
33
 23 36 3 2.5 44 2200 3200 163 190 0.83 0.73 0.4 79 77 111 132 5 13 2.6
31314
 T7GB070
70
150
35
 25 38 3 2.5 47 2000 3000 186 220 0.83 0.73 0.5 84 82 118 141 5 13 2.9
31315
 T7GB075
75
160
37
 26 40 3 2.5 50 1900 2800 204 240 0.83 0.73 0.4 91 87 127 151 6 14 3.4
31316
 T7GB080
80
170
39
 27 42.5 3 2.5 53 1900 2800 228 270 0.83 0.73 0.4 97 92 134 159 6 15.5 4.2
31317
 T7GB085
85
180
41
 28 44.5 4 3 55 1800 2600 255 305 0.83 0.73 0.4 103 99 143 169 6 16.5 4.9
31318
 T7GB090
90
190
43
 30 46.5 4 3 58 1700 2400 275 325 0.83 0.73 0.4 109 104 151 179 6 16.5 5.4
31319
 T7GB095
95
200
45
 32 49.5 4 3 61 1700 2400 275 325 0.83 0.73 0.4 114 109 157 187 6 17.5 6.7
31320
 T7GB100
100
215
51
 35 56.5 4 3 68 1600 2200 380 480 0.83 0.73 0.4 121 114 168 202 7 21.5 8.8
31321
 --
105
225
53
 36 58 4 3 -- 1600 2200 397 489 0.83 0.73 0.4 123 126 193 193 -- -- 9.72
31322
 T7GB110
110
240
57
 38 63 4 3 75 1400 1900 465 585 0.83 0.73 0.4 135 124 188 224 7 25 12.3
31324
 T7GB120
120
260
62
 42 68 4 3 82 1200 1700 540 695 0.83 0.73 0.4 145 134 203 244 9 26 15.1
31326
 T7GB130
130
280
66
 44 72 5 4 87 1100 1600 610 800 0.83 0.73 0.4 157 148 218 261 9 28 19.2
31328
 T7GB140
140
300
70
 47 77 5 4 94 1000 1500 695 900 0.83 0.73 0.4 169 158 235 280 9 30 23.4
31330
 T7GB150
150
320
75
 50 82 5 4 100 950 1400 780 1020 0.83 0.73 0.4 171 168 251 300 9 32 28.5
31332
 --
160
340
79
 54 87 5 4 -- 1000 1500 850 1220 0.83 0.7 0.4 205 185 307 323 -- -- 34.5
31334
 --
170
360
84
 56 92 5 4 -- 950 1400 965 1400 0.83 0.7 0.4 219 198 326 344 -- -- 40.9
31336
 --
180
380
88
 60 97 5 4 -- 950 1400 1040 1530 0.83 0.7 0.4 230 209 343 360 -- -- 47.7
31338
 --
190
400
92
 65 101 5 4 -- 900 1300 1120 1630 0.73 0.8 0.5 249 220 355 385 -- -- 54.1
31340
 --
200
420
97
 70 107 5 4 -- 850 1200 1320 1900 0.79 0.8 0.1 251 229 372 391 -- -- 65.1

Ningbo DHK Precision Bearing Co., Ltd.

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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 31300-Single Row Tapered Roller Bearings Factory and OEM/ODM Series 31300-Single Row Tapered 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.

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  • Environmental Managementsystem Certificate
  • Measurement Management System
  • Invention patent1
  • Invention patent2
  • Invention patent3
  • High-tech enterprises

Latest News

Industry Knowledge Expansion

1. Performance Specifications of Series 31300 Bearings
The performance specifications of Series 31300 Single Row Tapered Roller Bearings exemplify their capability to operate reliably and efficiently across diverse industrial applications. With a grease lubrication rating of 6300 and an oil lubrication rating of 8500, these bearings offer an impressive range of operational speeds while maintaining optimal performance. The grease lubrication rating of 6300 signifies the maximum rotational speed, measured in revolutions per minute (RPM), at which the bearing can operate effectively when lubricated with grease. This rating reflects the bearing's ability to withstand moderate speeds while ensuring adequate lubrication and heat dissipation, crucial factors for prolonging bearing life and preventing premature failure. Similarly, the oil lubrication rating of 8500 denotes the maximum RPM at which the bearing can operate when lubricated with oil. Oil lubrication offers advantages such as enhanced cooling and debris removal, allowing Series 31300 bearings to sustain higher speeds and heavier loads compared to grease lubrication. This versatility makes them suitable for applications requiring dynamic performance and operational flexibility. The lightweight construction of Series 31300 bearings, typically weighing around 0.28kg, contributes to their agility and responsiveness in dynamic systems. Reduced inertia enables quicker acceleration and deceleration, essential for applications where rapid changes in speed and direction are common.

2. Installation Best Practices
The installation of Series 31300 Single Row Tapered Roller Bearings demands meticulous attention to detail and adherence to best practices to ensure optimal performance and longevity. Proper installation procedures not only prevent premature bearing failure but also maximize operational efficiency and minimize maintenance requirements. First and foremost, alignment is paramount during installation to ensure uniform distribution of load across the bearing surfaces. Misalignment can lead to increased friction, uneven wear, and ultimately, bearing failure. Utilizing precision alignment tools and techniques, such as dial indicators or laser alignment systems, helps achieve the desired alignment accuracy within specified tolerances. Applying the appropriate preload to the bearings is essential for minimizing internal clearance and preventing excessive axial or radial play. Preload ensures proper contact between the bearing elements, promoting uniform load distribution and reducing the risk of vibration or noise during operation. Torque application during installation should be carried out according to manufacturer recommendations to achieve the optimal clamping force without overloading or distorting the bearing components. Using calibrated torque wrenches and following prescribed tightening sequences help maintain consistent preload and prevent damage to the bearing assembly. Regular inspection and verification of installation parameters, such as alignment, preload, and torque, are essential to detect any discrepancies or deviations from the prescribed values. Periodic maintenance checks, particularly during scheduled downtime, enable timely correction of any issues and ensure continued reliability and performance of Series 31300 bearings throughout their service life.