Miniature Angular Contact Ball Bearing

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Standard

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

Inner ring diameter

3mm-50mm

Outer ring diameter

10mm-110mm

Weight

1.6g-1140g

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, DBD, DBB, SU

Filters

NO. Product Product Number Basic dynamic load rating Basic static load rating Inner diameter (d) Mass Outer diameter (D) Width (B)
1 723C/ 723C 650 N 240 N 3 mm 1.6 g 10 mm 4 mm
2 719/4C/ 719/4C 720 N 290 N 4 mm 1.8 g 11 mm 4 mm
3 724C/ 724C 1330 N 510 N 4 mm 3.2 g 13 mm 5 mm
4 719/5C/ 719/5C 1090 N 440 N 5 mm 2.4 g 13 mm 4 mm
5 705C/ 705C 1550 N 520 N 5 mm 3.5 g 14 mm 5 mm
6 725C/ 725C 1770 N 690 N 5 mm 4.8 g 16 mm 5 mm
7 725CL/ 725CL 1770 N 690 N 5 mm 4.8 g 16 mm 5 mm
8 725CLP2/ 725CLP2 1770 N 690 N 5 mm 4.8 g 16 mm 5 mm
9 719/6C/ 719/6C 1306 N 540 N 6 mm 3.8 g 15 mm 5 mm
10 706C/ 706C 2030 N 770 N 6 mm 6 g 17 mm 6 mm
11 706CL/ 706CL 2030 N 770 N 6 mm 6 g 17 mm 6 mm
12 706CLP2/ 706CLP2 2030 N 770 N 6 mm 6 g 17 mm 6 mm
13 726C/ 726C 2770 N 1260 N 6 mm 8.1 g 19 mm 6 mm
14 726CL/ 726CL 2770 N 1260 N 6 mm 8.1 g 19 mm 6 mm
15 726CLP2/ 726CLP2 2770 N 1260 N 6 mm 8.1 g 19 mm 6 mm
16 719/7C/ 719/7C 1620 N 720 N 7 mm 5.2 g 17 mm 5 mm
17 707C/ 707C 2400 N 1020 N 7 mm 7.9 g 19 mm 6 mm
18 707CTYN/ 707CTYN 2400 N 1020 N 7 mm 7.9 g 19 mm 6 mm
19 707CLP2/ 707CLP2 2400 N 1020 N 7 mm 7.9 g 19 mm 6 mm
20 727C/ 727C 3360 N 1400 N 7 mm 13 g 22 mm 7 mm
21 719/8C/ 719/8C 2000 N 870 N 8 mm 7.3 g 19 mm 6 mm
22 708C/ 708C 3360 N 1400 N 8 mm 12 g 22 mm 7 mm
23 708CTYN/ 708CTYN 3360 N 1400 N 8 mm 12 g 22 mm 7 mm
24 708CL/ 708CL 3360 N 1400 N 8 mm 12 g 22 mm 7 mm
25 708CLP2/ 708CLP2 3360 N 1400 N 8 mm 12 g 22 mm 7 mm
26 728C/ 728C 4100 N 1600 N 8 mm 17 g 24 mm 8 mm
27 728CTYN/ 728CTYN 4100 N 1600 N 8 mm 17 g 24 mm 8 mm
28 728CL/ 728CL 4100 N 1600 N 8 mm 17 g 24 mm 8 mm
29 728CLP2/ 728CLP2 4100 N 1600 N 8 mm 17 g 24 mm 8 mm
30 719/9C/ 719/9C 2500 N 1100 N 9 mm 8.2 g 20 mm 6 mm
31 709C/ 709C 3900 N 1500 N 9 mm 15 g 24 mm 7 mm
32 729C/ 729C 4900 N 2100 N 9 mm 20 g 26 mm 8 mm
33 7800C/ 7800C 1900 N 980 N 10 mm 54 g 19 mm 5 mm
34 7900C/ 7900C 3150 N 1520 N 10 mm 90 g 22 mm 6 mm
35 7900CTYN/ 7900CTYN 3150 N 1520 N 10 mm 90 g 22 mm 6 mm
36 7900CL/ 7900CL 3150 N 1520 N 10 mm 90 g 22 mm 6 mm
37 7900CLP2/ 7900CLP2 3150 N 1520 N 10 mm 90 g 22 mm 6 mm
38 7000C/ 7000C 5500 N 2490 N 10 mm 19 g 26 mm 8 mm
39 7000CL/ 7000CL 5500 N 2490 N 10 mm 19 g 26 mm 8 mm
40 7000CLP2/ 7000CLP2 5500 N 2490 N 10 mm 19 g 26 mm 8 mm
41 7200C/ 7200C 5650 N 2610 N 10 mm 32 g 30 mm 9 mm
42 7300C/ 7300C 9300 N 4300 N 10 mm 53 g 35 mm 11 mm
43 7801C/ 7801C 2000 N 1400 N 12 mm 60 g 21 mm 5 mm
44 7901C/ 7901C 3550 N 1860 N 12 mm 11 g 24 mm 6 mm
45 7901CTYN/ 7901CTYN 3550 N 1860 N 12 mm 11 g 24 mm 6 mm
46 7901CL/ 7901CL 3550 N 1860 N 12 mm 11 g 24 mm 6 mm
47 7901CLP2/ 7901CLP2 3550 N 1860 N 12 mm 11 g 24 mm 6 mm
48 7001C/ 7001C 6100 N 2900 N 12 mm 21 g 28 mm 8 mm
49 7001CL/ 7001CL 6100 N 2900 N 12 mm 21 g 28 mm 8 mm
50 7001CLP2/ 7001CLP2 6100 N 2900 N 12 mm 21 g 28 mm 8 mm
51 7201C/ 7201C 8300 N 3850 N 12 mm 36 g 32 mm 10 mm
52 7301C/ 7301C 10800 N 4900 N 12 mm 63 g 37 mm 12 mm
53 7802C/ 7802C 2200 N 1800 N 15 mm 70 g 24 mm 5 mm
54 7902C/ 7902C 4800 N 3400 N 15 mm 20 g 28 mm 7 mm
55 7902CTYN/ 7902CTYN 4800 N 3400 N 15 mm 20 g 28 mm 7 mm
56 7902CL/ 7902CL 4800 N 3400 N 15 mm 20 g 28 mm 7 mm
57 7902CLP2/ 7902CLP2 4800 N 3400 N 15 mm 20 g 28 mm 7 mm
58 7002C/ 7002C 6550 N 3400 N 15 mm 26 g 32 mm 9 mm
59 7002CL/ 7002CL 6550 N 3400 N 15 mm 26 g 32 mm 9 mm
60 7002CLP2/ 7002CLP2 6550 N 3400 N 15 mm 26 g 32 mm 9 mm
61 7202C/ 7202C 9100 N 4550 N 15 mm 45 g 35 mm 11 mm
62 7302C/ 7302C 13300 N 6805 N 15 mm 85 g 42 mm 13 mm
63 7803C/ 7803C 2300 N 1900 N 17 mm 80 g 26 mm 5 mm
64 7903C/ 7903C 5250 N 2940 N 17 mm 107 g 30 mm 7 mm
65 7903CTYN/ 7903CTYN 5250 N 2940 N 17 mm 107 g 30 mm 7 mm
66 7903CL/ 7903CL 5250 N 2940 N 17 mm 107 g 30 mm 7 mm
67 7903CLP2/ 7903CLP2 5250 N 2940 N 17 mm 107 g 30 mm 7 mm
68 7003C/ 7003C 6960 N 3800 N 17 mm 39 g 35 mm 10 mm
69 7003CL/ 7003CL 6960 N 3800 N 17 mm 39 g 35 mm 10 mm
70 7003CLP2/ 7003CLP2 6960 N 3800 N 17 mm 39 g 35 mm 10 mm
71 7203C/ 7203C 11400 N 5850 N 17 mm 65 g 40 mm 12 mm
72 7303C/ 7303C 15700 N 8250 N 17 mm 109 g 47 mm 14 mm
73 7804C/ 7804C 3900 N 3400 N 20 mm 18 g 32 mm 7 mm
74 7904C/ 7904C 7400 N 5800 N 20 mm 20 g 37 mm 9 mm
75 7904CTYN/ 7904CTYN 7400 N 5800 N 20 mm 20 g 37 mm 9 mm
76 7904CL/ 7904CL 7400 N 5800 N 20 mm 20 g 37 mm 9 mm
77 7904CLP2/ 7904CLP2 7400 N 5800 N 20 mm 20 g 37 mm 9 mm
78 7004C/ 7004C 1170 N 6550 N 20 mm 71 g 42 mm 12 mm
79 7004CLP2/ 7004CLP2 1170 N 6550 N 20 mm 71 g 42 mm 12 mm
80 7204C/ 7204C 15300 N 8050 N 20 mm 103 g 47 mm 14 mm
81 7304C/ 7304C 18500 N 9950 N 20 mm 140 g 52 mm 15 mm
82 7805C/ 7805C 3900 N 3300 N 25 mm 123 g 37 mm 7 mm
83 7905C/ 7905C 8150 N 5700 N 25 mm 326 g 42 mm 9 mm
84 7905CTYN/ 7905CTYN 8150 N 5700 N 25 mm 326 g 42 mm 9 mm
85 7905CL/ 7905CL 8150 N 5700 N 25 mm 326 g 42 mm 9 mm
86 7905CLP2/ 7905CLP2 8150 N 5700 N 25 mm 326 g 42 mm 9 mm
87 7005C/ 7005C 1230 N 7400 N 25 mm 78 g 47 mm 12 mm
88 7005CL/ 7005CL 1230 N 7400 N 25 mm 78 g 47 mm 12 mm
89 7005CLP2/ 7005CLP2 1230 N 7400 N 25 mm 78 g 47 mm 12 mm
90 7205C/ 7205C 17400 N 10200 N 25 mm 127 g 52 mm 15 mm
91 7305C/ 7305C 22900 N 13300 N 25 mm 243 g 62 mm 17 mm
92 7806C/ 7806C 4400 N 3650 N 30 mm 129 g 42 mm 7 mm
93 7906C/ 7906C 8700 N 6250 N 30 mm 49 g 47 mm 9 mm
94 7906CTYN/ 7906CTYN 8700 N 6250 N 30 mm 49 g 47 mm 9 mm
95 7906CL/ 7906CL 8700 N 6250 N 30 mm 49 g 47 mm 9 mm
96 7906CLP2/ 7906CLP2 8700 N 6250 N 30 mm 49 g 47 mm 9 mm
97 7006C/ 7006C 13590 N 9890 N 30 mm 130 g 55 mm 13 mm
98 7006CL/ 7006CL 13590 N 9890 N 30 mm 130 g 55 mm 13 mm
99 7006CLP2/ 7006CLP2 13590 N 9890 N 30 mm 130 g 55 mm 13 mm
100 7206C/ 7206C 23000 N 14700 N 30 mm 208 g 62 mm 16 mm

 Characteristics and advantages of QIBR micro angular contact ball bearings

QIBR micro angular contact ball bearings have solved multiple key problems in various fields, mainly reflected in the following aspects; 

1. QIBR micro angular contact ball bearings have strong load capacity

Micro angular contact ball bearings can be both radial and axial loads, and can even withstand pure axial loads. This ability makes it perform excellently in applications that require bearing multi-directional loads. The design of contact angle directly affects its axial load capacity, and the larger the contact angle, the stronger the axial load capacity it can withstand.

2. QIBR micro angular contact ball bearings have excellent operational stability

Micro angular contact ball bearings are usually used in pairs to improve operational stability. By pairing, micro angular contact ball bearings can provide higher axial rigidity and effectively reduce or eliminate radial clearances, which helps improve equipment accuracy and stability. This is crucial for applications that require high precision and stability, such as machine tool spindles or high-precision rotating equipment.

3. The lifespan of QIBR micro angular contact ball bearings has been greatly improved

The service life of QIBR micro angular contact ball bearings can be significantly improved through reasonable installation and preloading. The correct installation method can reduce additional stress, thereby reducing wear and extending the service life of bearings.

4. QIBR miniature angular contact ball bearings can effectively control noise

Micro angular contact ball bearings have made significant progress in noise control. High precision QIBR micro angular contact ball bearings can effectively reduce noise during operation and improve overall equipment performance through precise installation, appropriate lubrication, and advanced monitoring systems.

5. QIBR micro angular contact ball bearings have high cost-effectiveness

The design of micro angular contact ball bearings allows for efficient load support in relatively small spaces. Compared to combinations of multiple single row bearings, using double row or paired designs can reduce costs while improving rigidity and stability.

In summary, micro angular contact ball bearings have solved various problems in high-speed and high load applications through their superior load capacity, motion stability, long service life, noise control, and cost-effectiveness.

Performance improvement and solution of QIBR micro angular contact ball bearings

1. Effectively improve material performance

Micro angular contact ball bearings use high-quality steel to manufacture the inner and outer rings and balls during production, and improve surface hardness and material properties through processes such as vacuum heat treatment, enhancing the bearing's load-bearing capacity and service life.

2. Optimize internal structural design

The structural parameters of micro angular contact ball bearings are optimized through finite element analysis and other methods. For example, by adjusting the contact angle, the curvature radius of the inner and outer rings, etc., the axial stiffness and load-bearing capacity of the bearing can be improved.

3. Improve manufacturing accuracy

Adopting advanced processing equipment and techniques from abroad, such as precision grinding, ultra precision grinding, etc., to improve the geometric accuracy of the inner and outer rings and balls, reduce processing errors, improving the rotational accuracy and operational stability of the bearings. In addition, it can also ensure the protrusion and roughness of the bearings.

4. Improve lubrication performance

Select high-performance lubricating grease, such as aviation lubricating grease, and adopt sealing measures, such as double-sided contact sealing rings, to reduce grease loss, improve the lubrication performance of micro angular contact ball bearings, and reduce friction and wear.

5. Optimize pre-tightening design

By optimizing the magnitude and method of pre tightening force, such as using elastic washers for pre tightening, the length change of the shaft after heating and the radial clearance change caused by the temperature difference between the inner and outer rings will not affect the pre tightening deformation, while reducing internal stress and extending the service life.

In summary, by optimizing materials, structures, manufacturing processes, lubrication, and pre tensioning designs, the performance of micro angular contact ball bearings can be significantly improved to meet increasingly demanding application requirements.

The main application areas of QIBR micro angular contact ball bearings

QIBR micro angular contact ball bearings are widely used in medical equipment, precision instruments, power tools, electronic equipment, automation equipment, instrumentation, aerospace and other fields. Its compact design and high performance make it suitable for applications that require high space and precision.