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)
201 5205 5205 ZZ 23.6 KN 13.8 KN 25 mm 0.190 kg 52 mm Shielded 20.6 mm
202 5305 5305 ZZ 34.3 KN 18.5 KN 25 mm 0.340 kg 62 mm Shielded 25.4 mm
203 5206 5206 ZZ 31.7 KN 18.3 KN 30 mm 0.290 kg 62 mm Shielded 23.8 mm
204 5306 5306 ZZ 42.9 KN 25.2 KN 30 mm 0.510 kg 72 mm Shielded 30.2 mm
205 5207 5207 ZZ 39.7 KN 24.6 KN 35 mm 0.430 kg 72 mm Shielded 27 mm
206 5307 5307 ZZ 57.6 KN 32.8 KN 35 mm 0.790 kg 80 mm Shielded 34.9 mm
207 5208 5208 ZZ 45.7 KN 29.1 KN 40 mm 0.570 kg 80 mm Shielded 30.2 mm
208 5308 5308 ZZ 64.3 KN 37.8 KN 40 mm 1.050 kg 90 mm Shielded 36.5 mm
209 5209 5209 ZZ 52.1 KN 33.9 KN 45 mm 0.620 kg 85 mm Shielded 30.2 mm
210 5309 5309 ZZ 86.1 KN 51.4 KN 45 mm 1.420 kg 100 mm Shielded 39.7 mm
211 5210 5210 ZZ 55.2 KN 37.9 KN 50 mm 0.670 kg 90 mm Shielded 30.2 mm
212 5310 5310 ZZ 102 KN 62.2 KN 50 mm 1.930 kg 110 mm Shielded 44.4 mm
213 5211 5211 ZZ 66.1 KN 44.7 KN 55 mm 0.960 kg 100 mm Shielded 33.3 mm
214 5311 5311 ZZ 120 KN 74.3 KN 55 mm 2.300 kg 120 mm Shielded 49.2 mm
215 5212 5212 ZZ 78.3 KN 55.9 KN 60 mm 1.360 kg 110 mm Shielded 36.5 mm
216 5312 5312 ZZ 138 KN 87.1 KN 60 mm 3.160 kg 130 mm Shielded 54 mm
217 5213 5213 ZZ 86.5 KN 63.1 KN 65 mm 1.660 kg 120 mm Shielded 38.1 mm
218 5313 5313 ZZ 178 KN 113 KN 65 mm 3.910 kg 140 mm Shielded 58.7 mm
219 5214 5214 ZZ 95.4 KN 70.3 KN 70 mm 1.810 kg 125 mm Shielded 39.7 mm
220 5314 5314 ZZ 200 KN 129 KN 70 mm 4.890 kg 150 mm Shielded 63.5 mm
221 5315 5315 ZZ 218 KN 147 KN 75 mm 5.970 kg 160 mm Shielded 68.3 mm
222 5203 5203 2RS 15.9 KN 8.35 KN 17 mm 0.091 kg 40 mm Sealed 17.5 mm
223 5204 5204 2RS 20 KN 10.8 KN 20 mm 0.158 kg 47 mm Sealed 20.6 mm
224 5304 5304 2RS 24.7 KN 12.8 KN 20 mm 0.230 kg 52 mm Sealed 22.2 mm
225 5205 5205 2RS 23.6 KN 13.8 KN 25 mm 0.190 kg 52 mm Sealed 20.6 mm
226 5305 5305 2RS 34.3 KN 18.5 KN 25 mm 0.340 kg 62 mm Sealed 25.4 mm
227 5206 5206 2RS 31.7 KN 18.3 KN 30 mm 0.290 kg 62 mm Sealed 23.8 mm
228 5306 5306 2RS 42.9 KN 25.2 KN 30 mm 0.510 kg 72 mm Sealed 30.2 mm
229 5207 5207 2RS 39.7 KN 24.6 KN 35 mm 0.430 kg 72 mm Sealed 27 mm
230 5307 5307 2RS 57.6 KN 32.8 KN 35 mm 0.790 kg 80 mm Sealed 34.9 mm
231 5208 5208 2RS 45.7 KN 29.1 KN 40 mm 0.570 kg 80 mm Sealed 30.2 mm
232 5308 5308 2RS 64.3 KN 37.8 KN 40 mm 1.050 kg 90 mm Sealed 36.5 mm
233 5209 5209 2RS 52.1 KN 33.9 KN 45 mm 0.620 kg 85 mm Sealed 30.2 mm
234 5309 5309 2RS 86.1 KN 51.4 KN 45 mm 1.420 kg 100 mm Sealed 39.7 mm
235 5210 5210 2RS 55.2 KN 37.9 KN 50 mm 0.670 kg 90 mm Sealed 30.2 mm
236 5310 5310 2RS 102 KN 62.2 KN 50 mm 1.930 kg 110 mm Sealed 44.4 mm
237 5211 5211 2RS 66.1 KN 44.7 KN 55 mm 0.960 kg 100 mm Sealed 33.3 mm
238 5311 5311 2RS 120 KN 74.3 KN 55 mm 2.300 kg 120 mm Sealed 49.2 mm
239 5212 5212 2RS 78.3 KN 55.9 KN 60 mm 1.360 kg 110 mm Sealed 36.5 mm
240 5312 5312 2RS 138 KN 87.1 KN 60 mm 3.160 kg 130 mm Sealed 54 mm
241 5213 5213 2RS 86.5 KN 63.1 KN 65 mm 1.660 kg 120 mm Sealed 38.1 mm
242 5313 5313 2RS 178 KN 113 KN 65 mm 3.910 kg 140 mm Sealed 58.7 mm
243 5214 5214 2RS 95.4 KN 70.3 KN 70 mm 1.810 kg 125 mm Sealed 39.7 mm
244 5314 5314 2RS 200 KN 129 KN 70 mm 4.890 kg 150 mm Sealed 63.5 mm
245 5315 5315 2RS 218 KN 147 KN 75 mm 5.970 kg 160 mm Sealed 68.3 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.