Standard Angular Contact Ball Bearing

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Standard

GB,ASTM/AISI,ГОСТ,BS,JIS,NF,DIN / VDEh,DIN / VDEh

Inner ring diameter

12mm-75mm

Outer ring diameter

32mm-160mm

Weight

0.058kg-5.6kg

Material

GCr15, 52100, 100Cr6, SUJ2, Stainless Steel, Ceramic

Brand

QIBR/OEM/Neutral

Package

QIBR/Standard Industrial Package/OEM

Applications

Machine Tool Spindle, Centrifuge, Booster Pump, Oil Pump, Blower, Various Gearboxes, Laboratory Equipment

Pairing method

DB, DF, DT

Filters

NO. Product Product Number Basic dynamic load rating Basic static load rating Inner diameter (d) Mass Outer diameter (D) Type Width (B)
1 3204 3204 A 20.4 KN 12.9 KN 20 mm 0.16 kg 47 mm Open 20.6 mm
2 3204 3204 ATN9 20.4 KN 12.9 KN 20 mm 0.16 kg 47 mm 20.6 mm
3 3304A/ 3304A 23.6 KN 14.6 KN 20 mm 0.22 kg 52 mm Open 22.2 mm
4 3205 3205 A 21.6 KN 14.3 KN 25 mm 0.18 kg 52 mm Open 20.6 mm
5 3305 3305 A 32 KN 20.4 KN 25 mm 0.35 kg 65 mm Open 25.4 mm
6 3206 3206 A 30 KN 20.4 KN 30 mm 0.29 kg 62 mm Open 23.8 mm
7 3306 3306 A 42.5 KN 30 KN 30 mm 0.52 kg 72 mm Open 30.2 mm
8 3207 3207 A 40 KN 28 KN 35 mm 0.44 kg 72 mm Open 27 mm
9 3307 3307 A 52 KN 35.5 KN 35 mm 0.74 kg 80 mm Open 34.9 mm
10 3307 3307 DJ1 52.7 KN 41.5 KN 35 mm 0.79 kg 80 mm Open 34.9 mm
11 3208 3208 A 48 KN 36.5 KN 40 mm 0.57 kg 80 mm Open 30.2 mm
12 3308 3308 DNRCBM 49.4 KN 41.5 KN 40 mm 1.2 kg 90 mm Open 36.5 mm
13 3308 3308 DNRCBM/P5 49.4 KN 41.5 KN 40 mm 1.2 kg 90 mm Open 36.5 mm
14 3308 3308 A 64 KN 44 KN 40 mm 0.93 kg 90 mm Open 36.5 mm
15 3308 3308 DMA 68.9 KN 57 KN 40 mm 1.05 kg 90 mm Open 36.5 mm
16 3308 3308 DTN9 68.9 KN 57 KN 40 mm 1.05 kg 90 mm Open 36.5 mm
17 3209 3209 A 51 KN 39 KN 45 mm 0.63 kg 85 mm Open 30.2 mm
18 3309 3309 DNRCBM 61.8 KN 52 KN 45 mm 1.5 kg 100 mm Open 39.7 mm
19 3309 3309 DNRCBM/P5 61.8 KN 52 KN 45 mm 1.5 kg 100 mm Open 39.7 mm
20 3309 3309 A 75 KN 53 KN 45 mm 1.25 kg 100 mm Open 39.7 mm
21 3309 3309 DMA 79.3 KN 69.5 KN 45 mm 1.65 kg 100 mm Open 39.7 mm
22 3210 3210 A 51 KN 42.5 KN 50 mm 0.65 kg 90 mm Open 30.2 mm
23 3310 3310 DNRCBM 81.9 KN 69.5 KN 50 mm 1.95 kg 100 mm Open 44.4 mm
24 3310 3310 DNRCBM/P5 81.9 KN 69.5 KN 50 mm 1.95 kg 100 mm Open 44.4 mm
25 3310 3310 A 90 KN 64 KN 50 mm 1.7 kg 100 mm Open 44.4 mm
26 3310 3310 DMA 93.6 KN 85 KN 50 mm 2.2 kg 100 mm Open 44.4 mm
27 3211 3211 A 60 KN 47.5 KN 55 mm 0.91 kg 100 mm Open 33.3 mm
28 3311 3311 DNRCBM 95.6 KN 83 KN 55 mm 2.55 kg 120 mm Open 49.2 mm
29 3311 3311 DNRCBM/P5 95.6 KN 83 KN 55 mm 2.55 kg 120 mm Open 49.2 mm
30 3311 3311 DMA 111 KN 100 KN 55 mm 2.8 kg 120 mm Open 49.2 mm
31 3311 3311 A 112 KN 81.5 KN 55 mm 2.65 kg 120 mm Open 49.2 mm
32 3212 3212 A 73.5 KN 58.5 KN 60 mm 1.2 kg 110 mm Open 36.5 mm
33 3312 3312 A 127 KN 95 KN 60 mm 2.8 kg 130 mm Open 54 mm
34 3213 3213 A 80.6 KN 73.5 KN 65 mm 1.75 kg 120 mm Open 38.1 mm
35 3313 3313 DNRCBM 138 KN 122 KN 65 mm 4 kg 140 mm Open 58.7 mm
36 3313 3313 DNRCBM/P5 138 KN 122 KN 65 mm 4 kg 140 mm Open 58.7 mm
37 3313 3313 A 146 KN 110 KN 65 mm 4.1 kg 140 mm Open 58.7 mm
38 3214A/ 3214A 88.4 KN 80 KN 70 mm 1.9 kg 125 mm Open 39.7 mm
39 3314A/ 3314A 163 KN 125 KN 70 mm 5.05 kg 150 mm Open 63.5 mm
40 3215 3215 A 95.6 KN 88 KN 75 mm 2.1 kg 130 mm Open 41.3 mm
41 3315 3315 A 176 KN 140 KN 75 mm 5.55 kg 160 mm Open 68.3 mm
42 3216 3216 A 106 KN 95 KN 80 mm 2.65 kg 140 mm Open 44.4 mm
43 3316 3316 A 193 KN 156 KN 80 mm 6.8 kg 170 mm Open 68.3 mm
44 3217 3217 A 124 KN 110 KN 85 mm 3.4 kg 150 mm Open 49.2 mm
45 3317 3317 A 208 KN 176 KN 85 mm 8.3 kg 180 mm Open 73 mm
46 3218 3218 A 130 KN 120 KN 90 mm 4.15 kg 160 mm Open 52.4 mm
47 3318 3318 A 208 KN 180 KN 90 mm 9.25 kg 190 mm Open 73 mm
48 3219 3219 A 159 KN 146 KN 95 mm 5 kg 170 mm Open 55.6 mm
49 3319 3319 A 240 KN 216 KN 95 mm 11 kg 200 mm Open 77.8 mm
50 3220 3220 A 178 KN 166 KN 100 mm 6.1 kg 180 mm Open 60.3 mm
51 3320 3320 A 255 KN 255 KN 100 mm 13.5 kg 215 mm Open 82.6 mm
52 3222 3222 A 212 KN 212 KN 110 mm 8.8 kg 200 mm Open 69.8 mm
53 3322 3322 A 291 KN 305 KN 110 mm 19 kg 240 mm Open 92.1 mm
54 3201 3201 A-2Z 10.1 KN 5.6 KN 12 mm 0.058 kg 32 mm Closed 15.9 mm
55 3202 3202 A-2Z 11.2 KN 6.8 KN 15 mm 0.066 kg 35 mm Closed 15.9 mm
56 3202 3202 A-2Z 11.2 KN 6.8 KN 15 mm 0.066 kg 35 mm Closed 15.9 mm
57 3302 3302 A-2Z 15.1 KN 9.3 KN 15 mm 0.13 kg 42 mm Closed 19 mm
58 3203 3203 A-2Z 14.3 KN 8.8 KN 17 mm 0.1 kg 40 mm Closed 17.5 mm
59 3303 3303 A-2Z 21.6 KN 12.7 KN 17 mm 0.18 kg 47 mm Closed 22.2 mm
60 3204 3204 A-2Z 20.4 KN 12.9 KN 20 mm 0.16 kg 47 mm Closed 20.6 mm
61 3304 3304 A-2Z 23.6 KN 14.6 KN 20 mm 0.22 kg 52 mm Closed 22.2 mm
62 3205 3205 A-2Z 21.6 KN 14.3 KN 25 mm 0.18 kg 52 mm Closed 20.6 mm
63 3305 3305 A-2Z 32 KN 20.4 KN 25 mm 0.35 kg 62 mm Closed 25.4 mm
64 3206 3206 A-2Z 30 KN 20.4 KN 30 mm 0.29 kg 62 mm Closed 23.8 mm
65 3306 3306 A-2Z 42.5 KN 30 KN 30 mm 0.52 kg 72 mm Closed 30.2 mm
66 3207 3207 A-2Z 40 KN 28 KN 35 mm 0.44 kg 72 mm Closed 27 mm
67 3307 3307 A-2Z 52 KN 35.5 KN 35 mm 0.74 kg 80 mm Closed 34.9 mm
68 3208 3208 A-2Z 48 KN 36.5 KN 40 mm 0.57 kg 80 mm Closed 30.2 mm
69 3308 3308 A-2Z 64 KN 44 KN 40 mm 0.93 kg 90 mm Closed 36.5 mm
70 3209 3209 A-2Z 51 KN 39 KN 45 mm 0.63 kg 85 mm Closed 30.2 mm
71 3309 3309 A-2Z 75 KN 53 KN 45 mm 1.25 kg 100 mm Closed 39.7 mm
72 3210 3210 A-2Z 51 KN 42.5 KN 50 mm 0.55 kg 90 mm Closed 30.2 mm
73 3310 3310 A-2Z 90 KN 64 KN 50 mm 1.7 kg 100 mm Closed 44.4 mm
74 3211 3211 A-2Z 60 KN 47.5 KN 55 mm 0.91 kg 100 mm Closed 33.3 mm
75 3311 3311 A-2Z 112 KN 81.5 KN 55 mm 2.65 kg 120 mm Closed 49.2 mm
76 3212 3212 A-2Z 73.5 KN 58.5 KN 60 mm 1.2 kg 110 mm Closed 36.5 mm
77 3312 3312 A-2Z 127 KN 95 KN 60 mm 2.8 kg 130 mm Closed 54 mm
78 3213 3213 A-2Z 80.6 KN 73.5 KN 65 mm 1.75 kg 120 mm Closed
79 3313 3313 A-2Z 146 KN 110 KN 65 mm 4.1 kg 140 mm Closed 58.7 mm
80 3214 3214 A-2Z 88.4 KN 80 KN 70 mm 1.9 kg 125 mm Closed 39.7 mm
81 3314 3314 A-2Z 163 KN 125 KN 70 mm 5.05 kg 150 mm Closed 63.5 mm
82 3215 3215 A-2Z 95.6 KN 88 KN 75 mm 2.1 kg 130 mm Closed 41.3 mm
83 3315 3315 A-2Z 176 KN 140 KN 75 mm 5.6 kg 160 mm Closed 68.3 mm
84 3201 3201 A-2RS1 10.1 KN 5.6 KN 12 mm 0.058 kg 32 mm Closed 15.9 mm
85 3202 3202 A-2RS1 11.2 KN 6.8 KN 15 mm 0.066 kg 35 mm Closed 15.9 mm
86 3302 3302 A-2RS1 15.1 KN 9.3 KN 15 mm 0.13 kg 42 mm Closed 19 mm
87 3203 3203 A-2RS1 14.3 KN 8.8 KN 17 mm 0.1 kg 40 mm Closed 17.5 mm
88 3303 3303 A-2RS1 21.6 KN 12.7 KN 17 mm 0.18 kg 47 mm Closed 22.2 mm
89 3204 3204 A-2RS1 20.4 KN 12.9 KN 20 mm 0.16 kg 47 mm Closed 20.6 mm
90 3304 3304 A-2RS1 23.6 KN 14.6 KN 20 mm 0.22 kg 52 mm Closed 22.2 mm
91 3205 3205 A-2RS1 21.6 KN 14.3 KN 25 mm 0.18 kg 52 mm Closed 20.6 mm
92 3305 3305 A-2RS1 32 KN 20.4 KN 25 mm 0.35 kg 62 mm Closed 25.4 mm
93 3206 3206 A-2RS1 30 KN 20.4 KN 30 mm 0.29 kg 62 mm Closed 23.8 mm
94 3306 3306 A-2RS1 42.5 KN 30 KN 30 mm 0.52 kg 72 mm Closed 30.2 mm
95 3207 3207 A-2RS1 40 KN 28 KN 35 mm 0.44 kg 72 mm Closed 27 mm
96 3307 3307 A-2RS1 52 KN 35.5 KN 35 mm 0.74 kg 80 mm Closed 34.9 mm
97 3208 3208 A-2RS1 48 KN 36.5 KN 40 mm 0.57 kg 80 mm Closed 30.2 mm
98 3308 3308 A-2RS1 64 KN 44 KN 40 mm 0.93 kg 90 mm Closed 36.5 mm
99 3209 3209 A-2RS1 51 KN 39 KN 45 mm 0.63 kg 85 mm Closed 30.2 mm
100 3309 3309 A-2RS1 75 KN 53 KN 45 mm 1.25 kg 100 mm Closed 39.7 mm

Characteristics and Advantages of QIBR Double-row Standard Angular Contact Ball Bearings 

QIBR double-row angular contact ball bearings have many significant characteristics and advantages and solve key problems in various fields, mainly reflected in the following aspects: 

1. QIBR double-row standard angular contact ball bearings have high rigidity

The design of double-row angular contact ball bearings allows them to withstand large radial loads and axial loads in two directions. This design enables the bearing to limit the bidirectional axial displacement of the shaft or housing. The contact angle is usually 30 degrees, thereby providing high rigidity and being able to withstand overturning moments. 

2. Operational stability of QIBR double-row standard angular contact ball bearings 

The friction coefficient of double-row angular contact ball bearings is relatively low, which helps reduce energy loss, improve mechanical efficiency, and at the same time reduce the heat generated during operation and extend the service life of the bearing. The high precision and high stability of this kind of bearing make it especially suitable for high-precision equipment to ensure the stability of equipment operation. 

3. The strong load-carrying capacity of QIBR double-row standard angular contact ball bearings

Double-row angular contact ball bearings can simultaneously withstand radial and bidirectional axial loads and are suitable for applications with heavy loads and impact loads. Its design allows the force point of the rolling element to form a certain angle with the vertical line of the axial direction, thereby enhancing the load-carrying capacity. Double-row angular contact ball bearings can withstand large radial loads and axial loads at the same time. 

4. High limit speed of QIBR double-row standard angular contact ball bearings

Under the same size, the limit speed of double-row angular contact ball bearings is usually higher than that of deep groove ball bearings and is suitable for high-speed rotating equipment. In addition, compared with two single-row bearings, the double-row design occupies less space and is more suitable for application environments with limited space.

5. QIBR double-row standard angular contact ball bearings effectively control noise 

Double-row standard angular contact ball bearings have also made significant progress in noise control. High-precision QIBR double-row standard angular contact ball bearings can effectively reduce operating noise and improve the overall performance of equipment through precise installation, appropriate lubrication and advanced monitoring systems. 

6. QIBR double-row standard angular contact ball bearings have high cost-effectiveness 

The design of double-row standard angular contact ball bearings allows it to provide efficient load support in a relatively small space. Compared with the combination of multiple single-row bearings, using a double-row structure design can reduce costs while improving rigidity and stability. 

In conclusion, double-row standard angular contact ball bearings solve various problems in high-speed and high-load applications through their superior load-carrying capacity, motion stability, noise control and cost-effectiveness.

Performance Improvement and Solutions for QIBR Double-row Standard Angular Contact Ball Bearings 

1. Effectively improve material performance

For double-row standard angular contact ball bearings, high-quality steel is selected to manufacture inner and outer rings and balls. Through processes such as vacuum heat treatment, the surface hardness and material properties are improved, thereby enhancing the bearing's load-carrying capacity and service life. 

2. Optimize internal structure design

Through means such as finite element analysis, the structural parameters of double-row standard angular contact ball bearings, such as contact angle, curvature radius of inner and outer rings, etc., are optimized to improve the axial stiffness and load-carrying capacity of the bearing. 

3. Improve manufacturing accuracy 

Adopt advanced foreign processing equipment and techniques, such as precision grinding and super finishing grinding, to improve the geometric accuracy of inner and outer rings and balls, reduce processing errors, and thereby improve the rotational accuracy and operational stability of the bearing. It can also ensure the protrusion and roughness of the bearing. 

4. Improve lubrication performance

Select excellent-performance grease, such as aviation grease, and adopt sealing measures, such as double-sided contact seals, to reduce the loss of grease, improve the lubrication performance of double-row standard angular contact ball bearings, and reduce friction and wear. 

5. Optimize preload design

By optimizing the magnitude and method of preload, such as using elastic washers for preloading, changes in radial clearance caused by changes in shaft length after heating and temperature differences between inner and outer rings will not affect the preload deformation amount. At the same time, internal stress is reduced and service life is extended. 

6. Multi-objective optimization design

Optimize the internal non-standardized structural size of angular contact ball bearings, which can significantly improve their working performance. This design method can improve the basic rated dynamic load and static load by adjusting internal parameters while ensuring that the standard values of inner diameter, outer diameter, and width remain unchanged. 

7. Selection of contact angle 

The contact angle of angular contact ball bearings (usually 15, 25, and 40 degrees) directly affects its load-carrying capacity and speed performance. The larger the contact angle, the stronger the axial load-carrying capacity, but at the same time, the speed will be reduced. Therefore, designers will select the appropriate contact angle according to specific application needs to optimize the performance of the bearing. In conclusion, by optimizing materials, contact angles, internal structure, manufacturing processes, lubrication, and preload design and other measures, the performance of double-row standard angular contact ball bearings can be significantly improved to meet increasingly demanding application requirements.

Main application fields of QIBR double-row standard angular contact ball bearings 

Double-row standard angular contact ball bearings are widely used in multiple fields, mainly including the following aspects: 

  • Industrial machinery: Double-row angular contact ball bearings are often used in equipment such as oil pumps, Roots blowers, and air compressors. Because they can simultaneously withstand radial and bidirectional axial loads, they provide high rigidity and load-carrying capacity. 
  • Automotive industry: In the front wheel hubs of cars, double-row angular contact ball bearings are widely used and can effectively limit the bidirectional axial displacement of shafts and housings. They are suitable for application occasions with high rigidity requirements. 
  • Machine tools and precision equipment: Due to their high speed and low noise characteristics, double-row angular contact ball bearings are also applied in high-precision rotating equipment such as machine tool spindles. 
  • Aviation and other high-demand fields: In high-demand industrial applications such as aviation, double-row angular contact ball bearings are widely adopted due to their superior performance to ensure the stability and reliability of equipment. 

Double-row standard angular contact ball bearings have become an indispensable important component in many industries due to their superior load-carrying capacity and adaptability.