Thrust Ball Bearing 51120
|Terms of Trade:||FOB,CIF,FCA|
|Delivery Time:||70 Days|
|Packaging:||Standard Export Package|
|Place of Origin:||China|
Model No.: 51120
Thrust ball bearings are separable and their limit rotational speed is low.
1.51000 type single-direction thrust ball bearings, this type of bearing can only accommodate axial load on one direction and can control the axial movement on one direction of the shaft and housing.
2.52000 type double-direction thrust ball bearings, this type of bearings can accommodate axial load on double direction and can control the axial movement on double direction of shaft and housing.
3. 560000 type thrust angular-contact Ball Bearing, as this structure can carry axial load and radial simultaneously.
When the outside diameter is equal or lesser than250mm, thrust ball bearings generally adopt pressed steel sheet cages, when the outside diameter is more than250mm,it will adopt solid cages.
Minimum axial load
When the thrust ball bearing is operating, if the applied axial load is too small, the axial direction is not tightly pressed, then acted by centrifugal force, the steel ball will slip and displace and destroy the normal operation of the bearings. To avoid the occurrence of such case, an axial load, Famin must be applied when the thrust ball bearings is working. The calculating formula is:
In the equation, Famin Minimum axial load (kN)
A Minimum load constant
N Revolution (r/min)
Minimum load constant A is showing in the bearings dimension table. If the applied axial load is small, a spring must be used to preload the bearing.
Permissible tilt angle
The double supporting surface of thrust ball bearings should be parallel. The axis center line should be square with shell supporting surface, if this is not assured, it can compensate by adopting spherical housing washer and self-aligning washer.
The tolerance value of thrust ball bearings is showing in the section [the tolerance of rolling bearing".
Dynamic equivalent axial load
Whenα=90°,thrust ball bearings can only carry axial load and its dynamic equivalent axial load is: Pa=Fa
Whenα≠90, acted by constant and invariable radial and axial loads, the dynamic equivalent axial load is: Pa=XFr+YFa
See Annex Table 1 for the coefficients of X and Y.
Static equivalent axial load
Whenα=90°, the static equivalent axial load is: P0a=Fa;
Whenα≠90°, the static equivalent axial load is: P0a=2.3Frtanα+Fa.
Where: For double-direction bearings, this equation is applicable to the status when the ration of radial load and axial load is an arbitrary value; for single-direction bearings, when Fr/Fa≤0.44ctgα, the equation is reliable; when, the Fr/Fa＞0.67ctgα, the equation can still give satisfactory P0avalue, but not very conservative.
Table 1 Value of X and Y
Notes: 1) For α`s medium value, use linear interpolation to calculate the values of X, Y and e.
2) Fa/ Fr≤e is not applicable to single-direction bearings.3) For thrust bearings withα>45°, use interpolation method to calculate the value of whenα=45°.
Xibei Bearing Co.,Ltd.
Xibei Bearing Co., Ltd. is located in the Yinchuan city, the capital of Ningxia province. Its predecessor, the Xibei Factory was founded in the depths of Helan Mountain in 1965. From 1982, it moved to Yinchuan city, and builds a modern factory in the Yinchuan city. It makes a positive contribution to the revitalization of bearing industry in China.Xibei Bearing Co., Ltd. is one of the biggest bearing manufactories in the west of China, one of the leading companies in bearing industry. It has certificate for the Exemption for the Export Inspection and its NXZ trademark is the Chinese well-know mark.Located In the northwest of China, Xibei Bearing Co., Ltd. orientate to equip China and service to the world. During the course of development, Xibei Bearing Co., Ltd. continuously accumulates experience, pioneering and innovative, forge ahead with determination. In accordance with the international standard and customer`s special requirement, Xibei Bearing can produce more than 6000 varieties of bearing standard and non-standard with outside diameter from 40mm to 3500mm. NXZ bearing is widely used in rail transit, military industry, precision motor, petroleum machinery, metallurgy machinery, heavy truck, construction machinery, mining machinery, cement machinery and hydraulic engineering, etc., and well sold all over China and export to over 50 countries and regions, such as Europe, America, Asia, Africa, etc. Xibei Bearing Co., Ltd. has National Enterprise Technical Center, postdoctoral scientific research workstation, and union engineering laboratory by local with state for large special bearing. There are abundant technical strength, first-class new product research & development, technology innovation ability, perfect technical innovation and product development system. It`s research and develops more than 200 kinds of new products per year on average. Research and development of oil drilling bearing 30228/630Q won the national quality gold medal. NXZ research & development and manufacturing process is leading level large special bearing. Products are successfully applied to the shenzhou V, Shenzhou VI launch monitoring device. Company has more than 500 kinds of products have filled the country blank space; nearly 1000 kinds of products reached the international advanced level.Xibei Bearing Co., Ltd. has all kinds of professional and technical personnel more than 300, including over 90 senior professional and technical personnel, with eight enjoy state council allowance, four enjoy the Ningxia autonomous region government subsidies, one is in the state [Bai qian wan project", and two are postdoctoral. Xibei Bearing promises the concept of [Customer First, Quality first" has successively passed the ISO9001 quality management system, ISO14001 environment manage system, ISO10012 metering management system, GJB9001B military quality system, ISO/TS16949 automotive quality system certification, and is national first-class metrology unit.Xibei Bearing Co., Ltd. possesses all kinds of equipment and test equipment of 2500 sets, in which, 425 sets are [large, precise and high-tech" equipment. It can supply the informatization and intelligentized process equipment to customer with higher quality product in bearing industry.Xibei Bearing Co., Ltd. makes the best of existing well-know mark, the advantage of the technology, resources and market, according to the [Made in China 2025" Strategy, promoteing high technology content, high value-added, high precision, high reliability bearing product. In Yinchuan state-level economic and technological development zone plans and constructs the first-level high-end bearing industrial base with digital, intelligent, informatization, greenization as the target. Xibei Bearing will be built into the biggest high-end bearing base in the West of China for research and develop, test and intelligent high-end base, the domestic first-level export high-end export base, fulfilled industry transformation and updating fulfill the capacity of annual output high-end equipment bearing for rail transit, military machinery, precision machinery, wind power, petroleum machinery, metallurgy machinery, mining machinery and heavy truck.
- Company Name: Xibei Bearing Co.,Ltd.
- Representative: Mr Zhao
- Product/Service: Bearing , Railway Bearing , Petroleum Bearing , Metallurgy Rolling Mill Bearing , Heavy Truck Bearing , Construction Machinery Bearing
- Capital (Million US $): 372,440,000RMB
- Year Established: 1965
- Total Annual Sales Volume (Million US $): US$50 Million - US$100 Million
- Export Percentage: 1% - 10%
- Total Annual Purchase Volume (Million US $): Below US$1 Million
- No. of Production Lines: Above 20
- No. of R&D Staff: Above 100 People
- No. of QC Staff: Above 100 People
- OEM Services Provided: yes
- Factory Size (Sq.meters): Above 100,000 square meters
- Factory Location: No.630,Beijing West Road, Yinchuan, Ningxia 750021, China
- Contact Person: Ms. Jane Li
- Tel: 86-951-2020454