The structure and properties of angular contact ball bearing

(1) the angular contact ball bearing deep groove ball bearing basic similar 

shape, there is a ring with only a wall, the other side slope. Compared 

with the same series of deep groove ball bearings with inner diameter 

specifications, the difference lies in the cage structure and with the 

number of the steel ball a little more.

(2) in the deep groove ball bearing inner ring angular contact ball bearing 

with outer slope of the inner ring is completely general, such as the inner 

ring to the deep groove ball bearing 6204 generic row angular contact ball 

bearing 7204AC.

(3) the linear ball bearing‍ retainer is real shape or stamped, no 

need of rivets.

(4) the limit speed angular contact ball bearing is higher than that of 

deep groove ball bearing the same size.

(5) can bear radial load, also can withstand a one-way axial load is 

larger, the contact angle is large ratio the bearing axial load and radial 

load is bigger.

(6) even bear radial load, also produce axial force, so the general angular 

contact ball bearings are used in pairs.

(7) the angular contact ball bearing Ding is, because of the effects of 

axial pre load after installation. Can eliminate bearing internal 

clearance, so relatively improve the rotation accuracy of R bearing. The 

application example in the machine tool spindle high precision, can make 

the radial and axial spindle runout minimum.

(8) two or more than two angular contact ball bearing group, can bear 

double direction axial load, or increase the bearing capacity of the single 

direction axial load.

(9) through the pre load can obtain more rigid and maintain long-term 

rotation precision characteristics of bearing the original.‍

Surface roughness analysis effect of crossed roller bearing properties

Effect of surface roughness on the performance of cross rolling bearing
parts is mainly manifested in the following aspects:
1, the surface roughness affect the wear resistance of parts. The surface is rough, with the effective contact area between the surface pressure is smaller, faster, and wear.
2, the surface roughness effects of cross roller bearing ring with the properties of stability. The clearance fit, the surface of the more
Rough, more easy to wear, so the work process of intermediate gap gradually
Increased; the interference fit, the assembly will micro convex peak crowded flat, reduces the effective interference, reduce the
The strength of the bond.
3, the surface roughness of fatigue strength of bearing parts. There is a big trough surface roughness of parts, they are like sharp
Angular notch and crack, the stress concentration is very sensitive,
Thus affecting the fatigue strength of parts.
The micro valley into the metal inner layer, causing the surface4, the surface roughness effects of corrosion resistance of bearing parts. The rough surface, easy to make the corrosive gas or liquid through the table
Corrosion.
5, the surface roughness of the sealing performance of bearing. Joint cannot be closely between the rough surface, gas or liquid.
Through the gap leakage between the contact surfaces of the.
6, the surface roughness of bearing parts of the contact stiffness. The contact stiffness is parts with surface under the action of external force, resistance
The ability to contact deformation. The machine stiffness in the very great degree
Depending on the components of the contact stiffness between.
Measurement accuracy of 7, effects of cross roller. Parts of the measured surface and a tool for measuring surface roughness will directly
Affect the precision of measurement, especially in precision measurement.
In addition, the surface roughness of the parts of the coating, thermal conductivity and contact resistance, reflection and radiation performance, liquid
The surface current resistance, conductor and the gas flow distribution etc.

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How to improve the matching precision cross roller bearing installation.

In order to improve the matching precision crossed roller bearing installation, must use the measurement methods and tools do not make the bearing deformation, precision measurement of bearing inner and outer circle with the surface size of the actual project, the measurement can be related to the inner and outer diameters of all be measured, and make a comprehensive analysis of the measured data according to this, precision, matching with the shaft and hole of shaft
The installation part size.
The distribution of shaft and hole in the actual measurement of the corresponding size and geometry, temperature and measurement should be carried out in the bearing under the same. To guarantee the higher actual tie effect, the shaft and hole matched with a bearing surface, the roughness should be as small as possible.
In the above measurement, should be in the outer circle and cross roller bearing inner hole, and the corresponding surface of the shaft and the seat hole, on both sides near the assembly chamfer, respectively two groups of marker can indicate the maximum deviation direction, so that in the actual assembly, so that the large deviation match two party aimed at the same azimuth, in this assembly, both of deviation to partially offset. Make two groups to purpose, is the deviation compensation can be considered, the rotating high precision bearings on both ends of the respective even increased, and the bearing seat hole and both ends of the trunnion coaxiality error are partially eliminated. The mating surface to surface strengthening measures, such as sandblasting, precision plunger diameter slightly larger plug a hole, are beneficial to improve matching precision. Large and outer bearing surplus volume, in order to convenient installation, there also will be the outer circle and the bearing seat hole is made with a small taper, the installation on two square taper fit, and cover with control outer advance amount, the amount of interference in the predetermined range, while the end cover end face friction resistance of the outer end face also contribute to the fixed ring, to prevent the occurrence of peristalsis. This installation method is particularly convenient for bearing the vertical installation.
According to the load direction, acting on the cross roller bearing inner ring and the outer ring of the nature and which side of the ferrule is rotating, the load can be divided into the rotating load, static load or non directional load. Under the rotating load and non directional loads shall be taken with the (static ring interference fit),static load bearing ferrule, desirable transition fit or movable fit (clearance).
The bearing load,Large or withstand the impact load, vibration, the interference must be increased. The hollow shaft, thin-wall bearing box or light alloy, plastic housings, also need to slim bearings increase the amount of interference. The requirement to maintain high rotation, should be used in high precision bearings, and improve the dimensional precision of shaft and bearing box, to avoid interference is too large. If the interference is too large, may make the geometry precision bearing shaft or bearing box
Geometry, to the detriment of the rotating precision bearings.

The inner ring split type cross roller bearings use characteristics

1 tolerance: general bearing, inner ring rotation relative to the outer ring, with tighter.The outer loose. The main reason is the outer ring plays a supporting role, no rotational force big.

(micro, outer ring relatively peristalsis, but not much) RE type bearing is just the opposite, namely two ring bearing force just the opposite. So, tolerance to the contrary. Active rotation

The ring fit will be relatively tight.

2 clearance: clearance basically selection and temperature and tolerance related. If only the outer ring of bearing tolerances for the elastic case, then influence the changes before and after not Is particularly high (but certainly, the precision can not be ignored), generally can be considered and the general bearing, because tolerance variations. As for the temperature, which completely and a revolving around it doesn't matter, mainly to see the external heat source. So there is no too much change. In a word, cross roller bearing clearance basically can choose to speed, temperature standard.

3 lubrication, should pay attention to, if the seal bearing, please do not use the dust cover, bearing will spill. To choose the rubber seal. If open bearing, a general note,then

Lubrication time interval to adjust for the past half. bearing with grease lubrication and lubrication of the sealing rubber ring double, ensure the lubrication effect of high precision bearings.‍

An anti dust sealed bearing

An anti dust sealed spindle bearing bearing, comprising a bearing outer ring, the inner ring of the bearing, roller, bearing ring and O ring, rolling body is arranged between the bearing outer ring and the inner ring of the bearing, the bearing outer ring and the inner ring of the bearing between the two ends are respectively provided with a slim ball bearing ring, the inner ring of the bearing is arranged on the outer surface and O shaped groove ring fit, O ring is embedded in the groove, bearing seal lip and the O ring surface contact. The utility model has the advantages as follows: combined sealing ring using O ring and the bearing, and in combination with the surface to prevent the dustfilled with oil to reach outside of bearing purpose. Widely used in machinery and equipment, dust effects of electrical appliances, hardware tools etc..

slewing ring bearings In the continuing drive national macro-control policy

In the continuing drive national macro-control policy, although China's bearing industry has created strong momentum to the sustainable growth of the industrial economy, but in the back of high economic growth, there are still huge room for improvement. With the wind power bearing  industry, the degree of market opening deepening market integration and network depth emerging economies gradually into the market without geographical restrictions and its cooperation and development advantages, as public enterprises geared competing objectives.
Dien China Bearing important slewing ring bearings base as a domestic bearing industry network development will need to assess the situation from the country's economic development, strategic sealed bearing adjustment to fit the needs of the market, trying to shape provides an inexhaustible driving force for our inner bearing enterprise source . Site Collection Enterprise Library, Library, library quotes, industry information, and many other specialized modules in one for the domestic bearing industry, companies create a fully functional, modern resource-rich e-commerce platform.
As China's bearing industry professional web portal, China Bearing from different aspects, different angles for the majority of enterprises to provide comprehensive services bearing and professional operations team, the increasing development of network technology and solid customer base lay groups to continue comprehensive network services for the protection of China's bearing industry boost high-end development.

slewing ring bearings a large number of commercial information is orderly classification

Planning an important task in particular the deployment of e-commerce to further promote the development of SMEs. By the SME Development Promotion Center of the Ministry of guidance Mainone Group set up to pave the way for the development of SMEs in mobile crane bearing China Information B2B alliance, yesterday held a press conference in Beijing on the second anniversary celebration.

Ministry of Industry and Information Technology Promotion Division introduced by the Director, said Yang Zhigang, Chinese B2B e-commerce alliance is to help enterprises to explore the conical bearing development of ideas, the ability to enhance e-commerce development, applications and services to promote good docking platform. China B2B alliances between industry sites, integrated commercial websites, corporate websites and SMEs to build a bridge, a large number of commercial information is orderly classification, sorting, clarity presented in front of SMEs to enhance the convenience of using the Internet for SMEs , speed and accuracy.

slewing ring bearings the construction machinery market downturn great influence on the bearing

The size of the bearing industry is growing at double-digit annual growth rate of rapidly growing. However, in this era of the brand in the industry to get the fight to survive, many enterprises of China's bearing industry is also ready to welcome the "brand era" coming ready?
What is a brand?
Good product allows you to value for money, but it allows you to do the brand value for money!
This is a "brand era," said the first decade if we are laying the foundation for the quality of products, so after a time, we should make the brand on the basis of the product, otherwise conical bearing companies do not have a competitive advantage, profit margins than others, but . You know, the average profit margin of China's bearing industry is only about 5%.
Recalling the development process of China's bearing industry, "fifteen", "during" the entire industry, technological progress is obvious, plus Bearing Industry Association, the industry wind power bearing engaged in a technical research, the life of the product, reliability, noise and material technology was a great improvement, especially small and miniature bearings, Jiangsu and Zhejiang Provinces produced small miniature bearings and product quality comparable to Japan. But later, due to the increasing competition among enterprises, some companies are reluctant to put a special technique to share with colleagues, some progress is slow.
In 2012, the construction machinery market downturn great influence on the bearing, 1 to December, China's bearing industry sales fell 6%, profits fell 25%. But the economic crisis is also an opportunity, many companies from 2009 onwards began to abandon the low-end products, research and development to proceed in large bearings.
Will become a trend in the future manufacturing services, according to the Chinese bearing industry plan, "Twelve Five", revenue from services will account for about 25% of the main business income.