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)
101 3210 3210 A-2RS1 51 KN 42.5 KN 50 mm 0.55 kg 90 mm Closed 30.2 mm
102 3310 3310 A-2RS1 90 KN 64 KN 50 mm 1.7 kg 100 mm Closed 44.4 mm
103 3211 3211 A-2RS1 60 KN 47.5 KN 55 mm 0.91 kg 100 mm Closed 33.3 mm
104 3311 3311 A-2RS1 112 KN 81.5 KN 55 mm 2.65 kg 120 mm Closed 49.2 mm
105 3212 3212 A-2RS1 73.5 KN 58.5 KN 60 mm 1.2 kg 110 mm Closed 36.5 mm
106 3313 3313 A-2RS1 146 KN 110 KN 65 mm 4.1 kg 140 mm Closed 58.7 mm
107 3200/ 3200 9.15 KN 5.35 KN 10 mm 0.052 kg 30 mm open 14.3 mm
108 3200 3200 A-2Z 7.61 KN 4.3 KN 10 mm 0.051 kg 30 mm 14 mm
109 3200 3200 A-2RS1 7.61 KN 4.3 KN 10 mm 0.051 kg 30 mm 14 mm
110 3201/ 3201 12.1 KN 7.15 KN 12 mm 0.063 kg 32 mm open 15.9 mm
111 3201 3201 ATN9 10.1 KN 5.6 KN 12 mm 0.058 kg 32 mm 15.9 mm
112 3202/ 3202 12.1 KN 7.45 KN 15 mm 0.072 kg 35 mm open 15.9 mm
113 3202 3202 ATN9 11.2 KN 6.8 KN 15 mm 0.066 kg 35 mm 15.9 mm
114 3302/ 3302 19 KN 11.9 KN 15 mm 0.132 kg 42 mm open 19 mm
115 3302 3302 ATN9 15.1KN 9.3 KN 15 mm 0.13 kg 42 mm 19 mm
116 3203/ 3203 17.2 KN 10.8 KN 17 mm 0.100 kg 40 mm open 17.5 mm
117 3203 3203 ATN9 14.3 KN 8.8 KN 17 mm 0.096 kg 40 mm 17.5 mm
118 3303/ 3303 23 KN 17.1 KN 17 mm 0.192 kg 47 mm open 22.2 mm
119 3303 3303 ATN9 21.6 KN 12.7 KN 17 mm 0.18 kg 47 mm 22.2 mm
120 3204/ 3204 21.5 KN 15 KN 20 mm 0.170 kg 47 mm open 20.6 mm
121 3304/ 3304 26 KN 18.4 KN 20 mm 0.230 kg 52 mm open 22.2 mm
122 3304 3304 ATN9 23.6 KN 14.6 KN 20 mm 0.22 kg 52 mm 22.2 mm
123 3205/ 3205 23.7 KN 18.2 KN 25 mm 0.190 kg 52 mm open 20.6 mm
124 3205 3205 ATN9 21.6 KN 14.3 KN 25 mm 0.18 kg 52 mm 20.6 mm
125 3305/ 3305 36.2 KN 26.5 KN 25 mm 0.369 kg 62 mm open 25.4 mm
126 3305 3305 ATN9 32 KN 20.4 KN 25 mm 0.35 kg 62 mm 25.4 mm
127 3206/ 3206 34.1 KN 27 KN 30 mm 0.320 kg 62 mm open 23.8 mm
128 3206 3206 ATN9 30 KN 20.4 KN 30 mm 0.29 kg 62 mm 23.8 mm
129 3306/ 3306 47.7 KN 36.1 KN 30 mm 0.585 kg 72 mm open 30.2 mm
130 3306 3306 ATN9 42.5 KN 30 KN 30 mm 0.52 kg 72 mm 30.2 mm
131 3207/ 3207 46 KN 37.5 KN 35 mm 0.480 kg 72 mm open 27 mm
132 3207 3207 ATN9 40 KN 28 KN 35 mm 0.44 kg 72 mm 27 mm
133 3307/ 3307 60.7 KN 46.8 KN 35 mm 0.816 kg 80 mm open 34.9 mm
134 3307 3307 ATN9 52 KN 35.5 KN 35 mm 0.74 kg 80 mm 34.9 mm
135 3208/ 3208 52.4 KN 43.9 KN 40 mm 0.650 kg 80 mm open 30.2 mm
136 3208 3208 ATN9 48 KN 36.5 KN 40 mm 0.57 kg 80 mm 30.2 mm
137 3308/ 3308 67.6 KN 53.8 KN 40 mm 1.070 kg 90 mm open 36.5 mm
138 3308 3308 ATN9 64 KN 44 KN 40 mm 0.93 kg 90 mm 36.5 mm
139 3209/ 3209 56.8 KN 51.4 KN 45 mm 0.710 kg 85 mm open 30.2 mm
140 3209 3209 ATN9 51 KN 39 KN 45 mm 0.63 kg 85 mm 30.2 mm
141 3309/ 3309 82.6 KN 67.3 KN 45 mm 1.420 kg 100 mm open 39.7 mm
142 3309 3309 ATN9 75 KN 53 KN 45 mm 1.25 kg 100 mm 39.7 mm
143 3210/ 3210 56.4 KN 52.1 KN 50 mm 0.760 kg 90 mm open 30.2 mm
144 3210 3210 ATN9 51 KN 42.5 KN 50 mm 0.65 kg 90 mm 30.2 mm
145 3310/ 3310 108 KN 88.6 KN 50 mm 1.950 kg 110 mm open 44.4 mm
146 3310 3310 ATN9 90 KN 64 KN 50 mm 1.7 kg 110 mm 44.4 mm
147 3211/ 3211 63.6 KN 60.2 KN 55 mm 1.050 kg 100 mm open 33.3 mm
148 3211 3211 ATN9 60 KN 47.5 KN 55 mm 0.91 kg 100 mm 33.3 mm
149 3311/ 3311 126 KN 106 KN 55 mm 2.530 kg 120 mm open 49.2 mm
150 3311 3311 ATN9 112 KN 81.5 KN 55 mm 2.65 kg 120 mm 49.2 mm
151 3212/ 3212 80 KN 76.8 KN 60 mm 1.400 kg 110 mm open 36.5 mm
152 3212 3212 ATN9 73.5 KN 58.5 KN 60 mm 1.2 kg 110 mm 36.5 mm
153 3312/ 3312 156 KN 132 KN 60 mm 3.240 kg 130 mm open 54 mm
154 3213/ 3213 95.5 KN 97.4 KN 65 mm 1.750 kg 120 mm open 38.1 mm
155 3313/ 3313 177 KN 153 KN 65 mm 4.080 kg 140 mm open 58.7 mm
156 3214/ 3214 97.4 KN 96.4 KN 70 mm 1.920 kg 125 mm open 39.7 mm
157 3314/ 3314 188 KN 160 KN 70 mm 5.040 kg 150 mm open 63.5 mm
158 3215/ 3215 116 KN 120 KN 75 mm 2.100 kg 130 mm open 41.3 mm
159 3315/ 3315 211 KN 189 KN 75 mm 6.160 kg 160 mm open 68.3 mm
160 3216/ 3216 122 KN 121 KN 80 mm 2.640 kg 140 mm open 44.4 mm
161 3316/ 3316 230 KN 213 KN 80 mm 6.930 kg 170 mm open 68.3 mm
162 3217/ 3217 143 KN 143 KN 85 mm 3.390 kg 150 mm open 49.2 mm
163 3317/ 3317 235 KN 219 KN 85 mm 8.300 kg 180 mm open 73 mm
164 3218/ 3218 165 KN 167 KN 90 mm 4.140 kg 160 mm open 52.4 mm
165 3318/ 3318 256 KN 242 KN 90 mm 9.230 kg 190 mm open 73 mm
166 3219/ 3219 189 KN 193 KN 95 mm 5.000 kg 170 mm open 55.6 mm
167 3319/ 3319 273 KN 270 KN 95 mm 10.900 kg 200 mm open 77.8 mm
168 3220/ 3220 215 KN 221 KN 100 mm 6.100 kg 180 mm open 60.3 mm
169 3320/ 3320 312 KN 324 KN 100 mm 13.500 kg 215 mm open 82.6 mm
170 3221/ 3221 227 KN 237 KN 105 mm 7.370 kg 190 mm open 65.1 mm
171 3321/ 3321 331 KN 354 KN 105 mm 15.600 kg 225 mm open 87.3 mm
172 3222/ 3222 251 KN 263 KN 110 mm 8.800 kg 200 mm open 69.8 mm
173 3322/ 3322 352 KN 388 KN 110 mm 18.900 kg 240 mm open 92.1 mm
174 5203/ 5203 16.5 KN 8.15 KN 17 mm 0.091 kg 40 mm open 17.5 mm
175 5204/ 5204 24.6 KN 12.5 KN 20 mm 0.158 kg 47 mm open 20.6 mm
176 5304/ 5304 30.9 KN 15 KN 20 mm 0.230 kg 52 mm open 22.2 mm
177 5205/ 5205 26.7 KN 14.8 KN 25 mm 0.190 kg 52 mm open 20.6 mm
178 5305/ 5305 40.9 KN 20.8 KN 25 mm 0.340 kg 62 mm open 25.4 mm
179 5206/ 5206 37.2 KN 21.3 KN 30 mm 0.290 kg 62 mm open 23.8 mm
180 5306/ 5306 51.2 KN 28.5 KN 30 mm 0.510 kg 72 mm open 30.2 mm
181 5207/ 5207 49 KN 29 KN 35 mm 0.430 kg 72 mm open 27 mm
182 5307/ 5307 64 KN 36.2 KN 35 mm 0.790 kg 80 mm open 34.9 mm
183 5208/ 5208 55.5 KN 33.6 KN 40 mm 0.570 kg 80 mm open 30.2 mm
184 5308/ 5308 78.3 KN 45.4 KN 40 mm 1.050 kg 90 mm open 36.5 mm
185 5209/ 5209 62.3 KN 38.4 KN 45 mm 0.620 kg 85 mm open 30.2 mm
186 5309/ 5309 93.8 KN 55.7 KN 45 mm 1.420 kg 100 mm open 39.7 mm
187 5210/ 5210 66.7 KN 43.6 KN 50 mm 0.670 kg 90 mm open 30.2 mm
188 5310/ 5310 111 KN 67 KN 50 mm 1.930 kg 110 mm open 44.4 mm
189 5211/ 5211 82.3 KN 55.2 KN 55 mm 0.960 kg 100 mm open 33.3 mm
190 5311/ 5311 138 KN 85.1 KN 55 mm 2.300 kg 120 mm open 49.2 mm
191 5212/ 5212 93 KN 60..8 KN 60 mm 1.360 kg 110 mm open 36.5 mm
192 5312/ 5312 157 KN 98.7 KN 60 mm 3.160 kg 130 mm open 54 mm
193 5213/ 5213 109 KN 75.3 KN 65 mm 1.660 kg 120 mm open 38.1 mm
194 5313/ 5313 178 KN 113 KN 65 mm 3.910 kg 140 mm open 58.7 mm
195 5214/ 5214 118 KN 82.6 KN 70 mm 1.810 kg 125 mm open 39.7 mm
196 5314/ 5314 200 KN 129 KN 70 mm 4.890 kg 150 mm open 63.5 mm
197 5315/ 5315 218 KN 147 KN 75 mm 5.970 kg 160 mm open 68.3 mm
198 5203 5203 ZZ 15.9 KN 8.35 KN 17 mm 0.091 kg 40 mm Shielded 17.5 mm
199 5204 5204 ZZ 20 KN 10.8 KN 20 mm 0.158 kg 47 mm Shielded 20.6 mm
200 5304 5304 ZZ 24.7 KN 12.8 KN 20 mm 0.230 kg 52 mm Shielded 22.2 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.