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No. 61, BinHe Road, LuoLong Zone, LuoYang City, P.R. of China

+86 (0379) 639 68877

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info@qibr.com

products

Constant Section Bearing

Customizable



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  • QIBR Model Selection
  • QIBR Customized Bearing
  • QIBR Process Control
  • QIBR Sort and Grade

Designations

Dimension/inch

Weight/Ibs
d D B  
QIBR10X KAA10X

1

1.375

0.1875

0.026

QIBR15X KAA15X

1.5

1.875

0.1875

0.039

QIBR17X KAA17X

1.75

2.125

0.1875

0.045

QIBR020X KA020X

2

2.5

0.25

0.1

QIBR025X KA025X

2.5

3

0.25

0.13

QIBR030X KA030X

3

3.5

0.25

0.15

QIBR035X KA035X

3.5

4

0.25

0.18

QIBR040X KA040X

4

4.5

0.25

0.19

QIBR020X KB020X

2

2.625

0.3125

0.16

QIBR025X KB025X

2.5

3.125

0.3125

0.19

QIBR030X KB030X

3

3.625

0.3125

0.24

QIBR035X KB035X

35

4.125

0.3125

0.27

QIBR040X KB040X

4

4.625

0.3125

0.3

QIBR040X KC040X

4

4.75

0.375

0.45

QIBR042X KC042X

4.25

5

0.375

0.47

QIBR045X KC045X

4.5

5.25

0.375

0.48

QIBR047X KC047X

4.75

5.5

0.375

0.5

QIBR050X KC050X

5

5.75

0.375

0.58

QIBR040X KD040X

4

5

0.5

0.78

QIBR042X KD042X

4.25

5.25

0.5

0.83

QIBR045X KD045X

4.5

5.5

0.5

0.88

QIBR047X KD047X

4.75

5.75

0.5

0.94

QIBR050X KD050X

5

6

0.5

1

QIBR040X KF040X

4

5.5

0.75

1.9

QIBR042X KF042X

4.25

5.75

0.75

2

QIBR045X KF045X

4.5

6

0.75

2.1

QIBR047X KF047X

4.75

6.25

0.75

2.2

QIBR050X KF050X

5

6.5

0.75

2.3

QIBR040X KG040X

4

6

1

3.6

QIBR042X KG042X

4.25

6.25

1

3.8

QIBR045X KG045X

4.5

6.5

1

4

QIBR047X KG047X

4.75

6.75

1

4.1

QIBR050X KG050X

5

7

1

4.3

QIBR10C KAA10C

1

1.375

0.1875

0.026

QIBR15C KAA15C

1.5

1.875

0.1875

0.039

QIBR17C KAA17C

1.75

2.125

0.1875

0.045

QIBR020C KA020C

2

2.5

0.25

0.1

QIBR025C KA025C

2.5

3

0.25

0.13

QIBR030C KA030C

3

3.5

0.25

0.15

QIBR035C KA035C

3.5

4

0.25

0.18

QIBR040C KA040C

4

4.5

0.25

0.19

QIBR020C KB020C

2

2.625

0.3125

0.16

QIBR025C KB025C

2.5

3.125

0.3125

0.19

QIBR030C KB030C

3

3.625

0.3125

0.24

QIBR035C KB035C

35

4.125

0.3125

0.27

QIBR040C KB040C

4

4.625

0.3125

0.3

QIBR040C KC040C

4

4.75

0.375

0.45

QIBR042C KC042C

4.25

5

0.375

0.47

QIBR045C KC045C

4.5

5.25

0.375

0.48

QIBR047C KC047C

4.75

5.5

0.375

0.5

QIBR050C KC050C

5

5.75

0.375

0.58

QIBR040C KD040C

4

5

0.5

0.78

QIBR042C KD042C

4.25

5.25

0.5

0.83

QIBR045C KD045C

4.5

5.5

0.5

0.88

QIBR047C KD047C

4.75

5.75

0.5

0.94

QIBR050C KD050C

5

6

0.5

1

QIBR040C KF040C

4

5.5

0.75

1.9

QIBR042C KF042C

4.25

5.75

0.75

2

QIBR045C KF045C

4.5

6

0.75

2.1

QIBR047C KF047C

4.75

6.25

0.75

2.2

QIBR050C KF050C

5

6.5

0.75

2.3

QIBR040C KG040C

4

6

1

3.6

QIBR042C KG042C

4.25

6.25

1

3.8

QIBR045C KG045C

4.5

6.5

1

4

QIBR047C KG047C

4.75

6.75

1

4.1

QIBR050C KG050C

5

7

1

4.3

QIBR10A KAA10A

1

1.375

0.1875

0.026

QIBR15A KAA15A

1.5

1.875

0.1875

0.039

QIBR17A KAA17A

1.75

2.125

0.1875

0.045

QIBR020A KA020A

2

2.5

0.25

0.1

QIBR025A KA025A

2.5

3

0.25

0.13

QIBR030A KA030A

3

3.5

0.25

0.15

QIBR035A KA035A

3.5

4

0.25

0.18

QIBR040A KA040A

4

4.5

0.25

0.19

QIBR020A KB020A

2

2.625

0.3125

0.16

QIBR025A KB025A

2.5

3.125

0.3125

0.19

QIBR030A KB030A

3

3.625

0.3125

0.24

QIBR035A KB035A

35

4.125

0.3125

0.27

QIBR040A KB040A

4

4.625

0.3125

0.3

QIBR040A KC040A

4

4.75

0.375

0.45

QIBR042A KC042A

4.25

5

0.375

0.47

QIBR045A KC045A

4.5

5.25

0.375

0.48

QIBR047A KC047A

4.75

5.5

0.375

0.5

QIBR050A KC050A

5

5.75

0.375

0.58

QIBR040A KD040A

4

5

0.5

0.78

QIBR042A KD042A

4.25

5.25

0.5

0.83

QIBR045A KD045A

4.5

5.5

0.5

0.88

QIBR047A KD047A

4.75

5.75

0.5

0.94

QIBR050A KD050A

5

6

0.5

1

QIBR040A KF040A

4

5.5

0.75

1.9

QIBR042A KF042A

4.25

5.75

0.75

2

QIBR045A KF045A

4.5

6

0.75

2.1

QIBR047A KF047A

4.75

6.25

0.75

2.2

QIBR050A KF050A

5

6.5

0.75

2.3

QIBR040A KG040A

4

6

1

3.6

QIBR042A KG042A

4.25

6.25

1

3.8

QIBR045A KG045A

4.5

6.5

1

4

QIBR047A KG047A

4.75

6.75

1

4.1

QIBR050A KG050A

5

7

1

4.3

QIBR constant section bearings refer to bearings with same dimensions at radical and axial sections, which are mainly used under conditions of inadequate space, and its load bearing capacity get weaker for a little bit. The constant section bearing mainly includes constant section thin-wall bearing, commonly like deep groove ball bearing, angular contact bearing, four-points contact bearing and cross roller bearing etc. generally it adopts open structure, also constant section bearings with sealing structure.

Constant section deep groove ball bearing

constant section angular contact ball bearing

Constant section four-points contact bearing

constant section cross roller bearing

Raw material

QIBR precision anti-friction bearings are usually made of chrome steel, which consist of about 1% carbon, 1.5% chromium and a small amount of manganese, silicon, and sometimes a small amount of molybdenum.

QIBR offers you a wide range of material options such as GCr15, 100Cr6, SKF 3, SUJ-2 etc. At the same time, some models of QIBR are available in stainless steel.

The rolling element can be ceramic ball (silicon nitride). Due to ceramic is kind of special material, the ceramic ball bearing has advantages of higher rotation speed, good self-lubricating property, and the rigidity is 15%-20% higher than the general bearing, and better high temperature resistance.

Bearing cage

The high-quality cage used by QIBR bearings ensure that the balls are evenly distributed in the bearing rings and can be rotated properly.

The cage has stamped steel wave type, stamped steel rivet type, nylon or phenolic plastic.

QIBR offers a wide range of advice and options depending on the operating conditions.

Seals

In order to prevent contaminants from entering the inside of the bearing, QIBR uses a metal dust cover or a rubber seal with a metal skeleton.

QIBR are able to choose two types as a combination seals according to your working conditions, or choose different kinds of seal materials, such as nitrile rubber BUNA, acrylic rubber HYCAR, fluoro rubber VITON.

Type of lubrication

Lubricating oil is the basic lubricant for ball bearings. Previously most of the lubricating oil was extracted from petroleum. Synthetic oils are now acceptable due to improved performance, such as two lipid synthetic oils, silicones and fluorocarbon synthetic oils. In general, lipid synthetic oils have better low temperature properties, lower volatility, and better temperature characteristics and viscosity compared than petroleum refined oils. Essentially all lubricants contain additives to inhibit chemical changes, prevent metal corrosion, and improve physical properties (antifoam, etc.).

The silicone and fluorocarbon synthetic oils that adopted by QIBR have lower volatility and wider temperature/viscosity characteristics.

Radial clearance

The radial clearance is the gap between the steel ball and the ring. QIBR is precisely tailored to customer's temperature conditions, interference fit, misalignment of the bearing's axis, required noise level and speed.

Service life and the rated load

The bearing life is the number of bearing rotations before the fatigue occurs on the ring or any rolling element (or the rotation time at a constant speed). However, the same set of bearings will not necessarily have the same life under the same conditions. In this case, the rated life is the number of rotations that 90% of the bearings in this group can reach or exceed before bearing weariness (or the rotation time at a constant speed). The service life of QIBR series bearings are 10%-20% longer than other bearings of the same model, through strict production process, high standard material selection, precision control.

The adopted steel balls

The steel balls in the deep groove ball bearings used by QIBR are mainly designed according to the load requirements of the bearing. The bearing ball sizes of different models are different, generally the value of rib coefficient Kd (ditch depth) range 0.35-0.40. , related to bearing diameter, such as 6000 series Kd = 0.35, 6400 series Kd = 0.40; 6200 and 6300 series, d ≤ 25mm take Kd = 0.35, d > 25mm take Kd = 0.40. Groove depth = Kd × steel ball diameter.


Bearing steel ball material comparison table
GB (China) Gcr15 GCr15SiMn
ASTM/AISI (USA) 52100 *
ГОСТ(Russia) ШX15 ШX15CГ
BS (UK) 534A99 *
JIS (Japan) SUJ2 SUJ3
NF (France) 100C6 100CrMn6
VDEh (Germany) 100Cr6 (1.3505) 1.352
Grade of rollers G3, G5, G10, G16, G20, G24, G28, G40, G60, G100, G200
Bearing Standard
Bearing Precision Grade
GOST Grade 0 Grade 6 Grade 5 Grade 4 Grade 2
ISO P0 P6 P5 P4 P2

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