70.72.718.719 SERIES

Specifications

Standard: GB,ASTM/AISI,ГОСТ,BS,JIS,NF,DIN / VDEh,DIN / VDEh
Range of Inner Ring Dia.: 10mm-280mm
Range of Outer Ring Dia.: 20mm-400mm
Range of Weight: 0.2kg-300kg
Material: GCr15, 52100, 100Cr6, SUJ2, Stainless Steel, German High Nitrogen Stainless Steel CRONIDUR30, 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

QIBR Model Selection

Showing 1 - 25 of 11119 Products

Rows per page

QIBR Model Selection
No.	Product model	Inner diameter	Outer diameter	Total width	Basic dynamic load rating	Basic static load rating	Weight
1	7000 ACD/P4A	10 mm	26 mm	8 mm	3.97 KN	1.6 KN	0.019 kg
2	7000 ACD/P4AH1QBC	10 mm	26 mm	8 mm	3.97 KN	1.6 KN	0.019 kg
3	7000 ACE/GBP4AL	10 mm	26 mm	8 mm	2.86 KN	1.14 KN	0.019 kg
4	7000 ACE/HCP2	10 mm	26 mm	8 mm	2.86 KN	1.14 KN	0.019 kg
5	7000 ACE/P2	10 mm	26 mm	8 mm	2.86 KN	1.14 KN	0.019 kg
6	7000 ACE/P4A	10 mm	26 mm	8 mm	2.86 KN	1.14 KN	0.019 kg
7	7000 ACE/P4ALGB	10 mm	26 mm	8 mm	2.86 KN	1.14 KN	0.019 kg
8	7000 CDTNHA/P4AL1	10 mm	26 mm	8 mm	4.1 KN	1.66 KN	0.019 kg
9	7000A	10 mm	26 mm	8 mm	5 KN	2.34 KN	0.019 kg
10	7000A5	10 mm	26 mm	8 mm	5.15 KN	2.41 KN	0.019 kg
11	7000A5DT	10 mm	26 mm	8 mm	5.15 KN	2.41 KN	0.019 kg
12	7000A5M	10 mm	26 mm	8 mm	5.15 KN	2.41 KN	0.019 kg
13	7000A5MP2	10 mm	26 mm	8 mm	5.15 KN	2.41 KN	0.019 kg
14	7000A5P2	10 mm	26 mm	8 mm	5.15 KN	2.41 KN	0.019 kg
15	7000A5SN24	10 mm	26 mm	8 mm	5.15 KN	2.41 KN	0.019 kg
16	7000A5SN24P2	10 mm	26 mm	8 mm	5.15 KN	2.41 KN	0.019 kg
17	7000A5SN24TRDBHP4	10 mm	26 mm	8 mm	5.15 KN	2.41 KN	0.019 kg
18	7000A5SN24TRDBLP4	10 mm	26 mm	8 mm	5.15 KN	2.41 KN	0.019 kg
19	7000A5SN24TRDFHP4	10 mm	26 mm	8 mm	5.15 KN	2.41 KN	0.019 kg
20	7000A5SN24TRDFLP4	10 mm	26 mm	8 mm	5.15 KN	2.41 KN	0.019 kg
21	7000A5SN24TRDFMP4	10 mm	26 mm	8 mm	5.15 KN	2.41 KN	0.019 kg
22	7000A5SN24TRDTHP4	10 mm	26 mm	8 mm	5.15 KN	2.41 KN	0.019 kg
23	7000A5SN24TRDTLP4	10 mm	26 mm	8 mm	5.15 KN	2.41 KN	0.019 kg
24	7000A5SN24TRDTMP4	10 mm	26 mm	8 mm	5.15 KN	2.41 KN	0.019 kg
25	7000A5SN24TYNDBHP4	10 mm	26 mm	8 mm	5.15 KN	2.41 KN	0.019 kg

QIBR precision angular contact ball bearings offer solutions to enhance bearing rigidity, reduce noise and vibration, improve high-speed performance, and extend service life

QIBR precision angular contact ball bearings achieve significantly improved rigidity by using a larger number of large ceramic balls and a design with a larger groove curvature radius coefficient, which greatly increases the bearing's preload.
Noise and Vibration Reduction: To reduce bearing noise and vibration, the bearing raceway waviness and surface roughness are optimized, and a lightweight cage with optimized guided clearance is used.
Reliability and Longevity: The bearings are made from high-purity bearing steel, and the reliability and longevity are enhanced through austenite grain and carbide size refinement during the bearing blank processing. This greatly improves the contact fatigue life of the bearing. The surfaces of the inner and outer raceways undergo vacuum ion nitriding treatment, significantly enhancing the bearing's wear resistance.
High-Speed Performance: For high-speed applications, such as the QIBR QHCG... series bearings, a super high-speed design is used, with a speed factor DmN value of up to 3 million (oil-air lubrication) and 2 million (grease lubrication).

QIBR Precision Angular Contact Ball Bearings

High-speed precision angular contact ball bearings are available in various precision grades: standard precision is ISO Class 4 (ABEC 7), P4A (dimensional accuracy of ISO Class 4 with rotational accuracy higher than ISO Class 4), and ISO Class 2 (ABEC 9)

QIBR Precision Angular Contact Ball Bearings Preload Methods and Characteristics

Angular contact ball bearing axial preload can be categorized into two types based on the method of applying preload: positional preload and constant pressure preload.

Positional Preload: Positional preload refers to a method where the axial position of the bearing remains relatively unchanged during use. The required preload can be achieved by adjusting the width of the spacer between two bearings. Another approach involves grinding a certain amount of pre-deformation on the end faces of the inner or outer rings of a matched pair of bearings, achieving preload upon installation. Positional preload significantly enhances the rigidity of the bearing support system.
Constant Pressure Preload: Also known as constant force preload, this method ensures that the axial preload of the bearing remains constant during operation. The preload is achieved by adjusting the compression of a spring. Compared to positional preload, constant pressure preload is less effective at improving the axial rigidity of the support system under the same preload. However, with positional preload, the thermal expansion of the shaft and changes in radial clearance caused by temperature differences between the inner and outer rings can affect the amount of preload deformation, while constant pressure preload does not have these issues. Generally, positional preload is preferred when high rigidity is required, whereas constant pressure preload is more suitable for high-speed applications.

QIBR Model Selection

Showing 1 - 25 of 11119 Products

Rows per page

QIBR Model Selection
No.	Product model	Inner diameter	Outer diameter	Total width	Basic dynamic load rating	Basic static load rating	Weight
1	7000 ACD/P4A	10 mm	26 mm	8 mm	3.97 KN	1.6 KN	0.019 kg
2	7000 ACD/P4AH1QBC	10 mm	26 mm	8 mm	3.97 KN	1.6 KN	0.019 kg
3	7000 ACE/GBP4AL	10 mm	26 mm	8 mm	2.86 KN	1.14 KN	0.019 kg
4	7000 ACE/HCP2	10 mm	26 mm	8 mm	2.86 KN	1.14 KN	0.019 kg
5	7000 ACE/P2	10 mm	26 mm	8 mm	2.86 KN	1.14 KN	0.019 kg
6	7000 ACE/P4A	10 mm	26 mm	8 mm	2.86 KN	1.14 KN	0.019 kg
7	7000 ACE/P4ALGB	10 mm	26 mm	8 mm	2.86 KN	1.14 KN	0.019 kg
8	7000 CDTNHA/P4AL1	10 mm	26 mm	8 mm	4.1 KN	1.66 KN	0.019 kg
9	7000A	10 mm	26 mm	8 mm	5 KN	2.34 KN	0.019 kg
10	7000A5	10 mm	26 mm	8 mm	5.15 KN	2.41 KN	0.019 kg
11	7000A5DT	10 mm	26 mm	8 mm	5.15 KN	2.41 KN	0.019 kg
12	7000A5M	10 mm	26 mm	8 mm	5.15 KN	2.41 KN	0.019 kg
13	7000A5MP2	10 mm	26 mm	8 mm	5.15 KN	2.41 KN	0.019 kg
14	7000A5P2	10 mm	26 mm	8 mm	5.15 KN	2.41 KN	0.019 kg
15	7000A5SN24	10 mm	26 mm	8 mm	5.15 KN	2.41 KN	0.019 kg
16	7000A5SN24P2	10 mm	26 mm	8 mm	5.15 KN	2.41 KN	0.019 kg
17	7000A5SN24TRDBHP4	10 mm	26 mm	8 mm	5.15 KN	2.41 KN	0.019 kg
18	7000A5SN24TRDBLP4	10 mm	26 mm	8 mm	5.15 KN	2.41 KN	0.019 kg
19	7000A5SN24TRDFHP4	10 mm	26 mm	8 mm	5.15 KN	2.41 KN	0.019 kg
20	7000A5SN24TRDFLP4	10 mm	26 mm	8 mm	5.15 KN	2.41 KN	0.019 kg
21	7000A5SN24TRDFMP4	10 mm	26 mm	8 mm	5.15 KN	2.41 KN	0.019 kg
22	7000A5SN24TRDTHP4	10 mm	26 mm	8 mm	5.15 KN	2.41 KN	0.019 kg
23	7000A5SN24TRDTLP4	10 mm	26 mm	8 mm	5.15 KN	2.41 KN	0.019 kg
24	7000A5SN24TRDTMP4	10 mm	26 mm	8 mm	5.15 KN	2.41 KN	0.019 kg
25	7000A5SN24TYNDBHP4	10 mm	26 mm	8 mm	5.15 KN	2.41 KN	0.019 kg

QIBR precision angular contact ball bearings offer solutions to enhance bearing rigidity, reduce noise and vibration, improve high-speed performance, and extend service life

QIBR precision angular contact ball bearings achieve significantly improved rigidity by using a larger number of large ceramic balls and a design with a larger groove curvature radius coefficient, which greatly increases the bearing's preload.
Noise and Vibration Reduction: To reduce bearing noise and vibration, the bearing raceway waviness and surface roughness are optimized, and a lightweight cage with optimized guided clearance is used.
Reliability and Longevity: The bearings are made from high-purity bearing steel, and the reliability and longevity are enhanced through austenite grain and carbide size refinement during the bearing blank processing. This greatly improves the contact fatigue life of the bearing. The surfaces of the inner and outer raceways undergo vacuum ion nitriding treatment, significantly enhancing the bearing's wear resistance.
High-Speed Performance: For high-speed applications, such as the QIBR QHCG... series bearings, a super high-speed design is used, with a speed factor DmN value of up to 3 million (oil-air lubrication) and 2 million (grease lubrication).

QIBR Precision Angular Contact Ball Bearings

QIBR Precision Angular Contact Ball Bearings Preload Methods and Characteristics

Angular contact ball bearing axial preload can be categorized into two types based on the method of applying preload: positional preload and constant pressure preload.

Positional Preload: Positional preload refers to a method where the axial position of the bearing remains relatively unchanged during use. The required preload can be achieved by adjusting the width of the spacer between two bearings. Another approach involves grinding a certain amount of pre-deformation on the end faces of the inner or outer rings of a matched pair of bearings, achieving preload upon installation. Positional preload significantly enhances the rigidity of the bearing support system.
Constant Pressure Preload: Also known as constant force preload, this method ensures that the axial preload of the bearing remains constant during operation. The preload is achieved by adjusting the compression of a spring. Compared to positional preload, constant pressure preload is less effective at improving the axial rigidity of the support system under the same preload. However, with positional preload, the thermal expansion of the shaft and changes in radial clearance caused by temperature differences between the inner and outer rings can affect the amount of preload deformation, while constant pressure preload does not have these issues. Generally, positional preload is preferred when high rigidity is required, whereas constant pressure preload is more suitable for high-speed applications.

Specifications

QIBR Model Selection

QIBR precision angular contact ball bearings offer solutions to enhance bearing rigidity, reduce noise and vibration, improve high-speed performance, and extend service life

QIBR Precision Angular Contact Ball Bearings

QIBR Precision Angular Contact Ball Bearings Preload Methods and Characteristics

QIBR Model Selection

QIBR Model Selection

QIBR precision angular contact ball bearings offer solutions to enhance bearing rigidity, reduce noise and vibration, improve high-speed performance, and extend service life

QIBR Precision Angular Contact Ball Bearings

QIBR Precision Angular Contact Ball Bearings Preload Methods and Characteristics

QIBR Precision Angular Contact Ball Bearing Pairing