6 methods to distinguish the false bearings

Bearing is an important part in mechanical equipment. Its main function is to support the mechanical rotator, reduce the friction coefficient during its motion, and ensure its rotation accuracy. In production and processing, once fake bearings are used, the consequences are not only machine maintenance and even downtime, but also millions of losses for the company. Today I will share 6 methods to distinguish the false bearings.

1. Check the logo and characteristic on the package is clear or not. 
2. Check certificate of quality is standard or not. 
3. Check whether the steel print on the bearing is clear or not.
4. Check the overall quality of bearings.
5. Check the metallic luster of bearings.
6. Rotate the bearings to check whether there is noise or not. 

Performance of Thrust ball bearings

Thrust ball bearings can be separable. Thrust ball bearings have the following features：

1. Contact angle of thrust ball bearing is 90 degrees, and it can only withstand axial load. The unidirectional thrust ball bearing can only bear the axial load in one direction and the bidirectional thrust ball bearing can bear the axial load in two directions.

2. The steel ball of thrust ball bearing is pushed to the outside of the raceway due to centrifugal force, so it is not suitable for high-speed operation.

3. The thrust ball bearing with spherical seat ring has the self-aligning ability, which can eliminate the influence of installation error.

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Crossed roller bearings internal structure was 90 ° roller arranged perpendicular

Crossed roller bearings internal structure was 90 ° roller arranged perpendicular cross,
Spacing between rollers fitted retainer or isolation block to prevent roll-tilt roller mill mutual observation between child, effectively preventing the increase in rotational torque. Further, one of the rollers does not occur or the latch-up phenomenon of the contact; same time as the inner and outer ring is a split structure, the gap can be adjusted even if the preload is applied, can be obtained with high accuracy rotation.
2, the operation simplifies installation
Divided into two parts of the outer or inner ring, and after loading the roller holder is fixed together, so when you install operation is very simple.
3, bear large axial and radial loads
Because the rollers are arranged vertically spaced retainer by 90 ° to each other in a V-shaped groove raceway, this design makes cross roller angular contact thrust ball bearing can withstand higher radial load, axial load and moment load and all load direction.
4, substantial savings in installation space
Small, thin structure of particular cross-roller bearing inner and outer rings is a minimum size is close to the limit of small size, and has high rigidity, so the most suitable for the joints of an industrial robot or a rotary portion of the rotary machining center versatile table, robot rotating part, precision rotary tables, medical equipment, measuring instruments, IC manufacturing devices.
High 5 speed capability
Reducing the length of the shaft 6 and the processing cost, result in a limited thermal expansion changes the geometry

Slewing range of applications

Slewing range of applications
Slewing ring wide range of applications, mainly for lifting machinery (truck cranes, tower cranes, etc.), construction machinery (excavators, loaders, etc.), transportation machinery, materials processing machinery, metallurgical machinery, food processing machinery, as well as military equipment (tanks, anti-aircraft artillery, radar, rocket launchers, etc.), medical equipment, scientific equipment.
Slewing angular contact thrust ball bearing and plain bearings, rolling elements and has a band rolling ring raceway. However, it is compared with ordinary rolling bearing, there are many differences, and they are the following:
Slewing ring sizes are large, its diameter is usually 0.4 to 10 meters, some as high as 40 meters.
Slewing rings are generally required to bear the load of several aspects, not only to withstand the axial force, radial force, but also to withstand large overturning moment. Therefore, often acts as a slewing ring sets ordinary rolling bearings.
Slewing ring operating speed is very low, usually in the 10 rev / min or less. Moreover, in most cases, slewing ring without continuous rotation, but only within a certain angle and from the rotation, the equivalent of the so-called "swing bearing."
In the manufacturing process, materials and heat treatment, etc., slewing ring and rolling sealed angular contact ball bearing are very different.
Typically, the seal ring gear rotational drive and dustproof with a slewing ring on.

Development Status bearings

Development Status bearings
Bearing is an important foundation for all types of machinery and equipment parts, its precision, performance, longevity and reliability of the host precision, performance, longevity and reliability play a decisive role. Mechanical products, angular contact thrust ball bearing are precision products, comprehensive support not only in mathematics, theoretical physics, and many other disciplines, but also materials science, heat treatment technology, precision machining and measurement technology, digital technology and efficient numerical methods and powerful computer technology and many other disciplines to serve, therefore bearing is a representative national scientific and technological strength of the product.
After the international financial crisis in 2008, the state response to the financial crisis, has taken to increase infrastructure investment and stimulate economic development in the proactive fiscal policy. Benefit from the development of related industries, bearing rapidly expanding sales and profit levels would be enhanced significantly accelerate the development of the industry. According to the National Bureau of Statistics, China bearing manufacturing industry size in 2011 (annual sales income of 20 million yuan or more) companies a total of 1416 companies, total industrial output value of 193.211 billion yuan, an increase of 27.59%; sales revenue of 191.097 billion yuan, an increase of 30.30%; total profit of 12.523 billion yuan, an increase of 26.54% over the previous year.
In recent years, world famous enterprises have entered the Chinese market and establish production bases bearing. The company is not only a global business, and is a global manufacturer, by virtue of their superior brand, equipment, technology, capital and production scale, and domestic enterprises bearing a fierce competition. Domestic enterprises are mainly engaged in manufacturing general Bearing life testing machine, less special and high-end bearing manufacturers, technology is not mature. Therefore, domestic enterprises are to compete with foreign advanced bearing brands, and even beyond, but also need to go through a long period of time in terms of technology development.