2015年10月31日星期六

In order to ensure the bearing after installation without excessive deformation, must be

In order to ensure the bearing after installation without excessive deformation, must be:
(1) The roundness of the shaft and housing bore and the shoulder block verticality precision bearing in accordance to the respective requirements.
(2) it is necessary to accurately calculate the amount of interference with the rotating rings, but also accurately calculate the appropriate amount of fixed ferrule.
Rotatable collar burning interference to the extent possible should also get smaller. As long as the effects of thermal expansion and ensure the operating temperature, and maximum speed under the influence of centrifugal force, so as not to cause a tight fit creeping or sliding surfaces. The fixed ring according to the work load size and bearing size, choose small clearance fit or interference fit, too loose or too tight is not conducive to maintaining the original precise shape.
(3) bearing as running at high speed, and high operating temperatures, special attention should be rotating rings can not be too loose, in order to prevent the emergence with eccentric, and a gap can not be fixed ferrule to prevent ferrule deform under load and vibration excitation.
(4) Effect of fixed ring take a small interference fit with the proviso that both sides have a high mating surface shape accuracy and less roughness, or cause installation difficulties disassembly harder, in addition, also we need to consider the thermal elongation of the spindle .
(5) pairs of double angular contact ball bearing spindle, most of the load is light, the blending amount of interference, such as too large, then its internal axial preload amount will be significantly larger, resulting in adverse effects. Use double row cylindrical roller bearings and tapered roller bearings Spindle spindle, its load is relatively large, so its interference with relatively large.



2015年10月26日星期一

One way bearing is free to rotate in one direction

One way bearing is free to rotate in one direction, while in the other direction to lock a bearing. Also known as the one-way clutch bearing, but according to different industries, the role of different named. One-way bearing metal housing, the roller containing a number, needle or ball, and the rolling seat (hole) in the shape that it can only scroll in one direction, while in the other direction will have a lot of resistance (The so-called "one-way").
One-way bearing powder metallurgy molding and sintering of metal powder (or mixture of metal powder and nonmetal powder) is made of technology products.Slewing bearing On the basis of research and technological changes characteristic properties of the powder on the use of appropriate technical process, change the shape, performance, and their organizational structure of the powder and become adapted to different needs of bearing products.

2015年10月22日星期四

Air bearings are designed to meet the specific application requirements of the aviation industry.

Timken's standard configuration aviation bearing, designed to meet the specific application requirements of the aviation industry. Most aviation company bearing 52100 steel vacuum melting or double vacuum melting (VIM-VAR) of M-50 steel, in line with ABEC / RBEC 5 bearing level requirements, high strength machined cage. railway bearing, specializing in the supply of railway, motor car, the train used above.
By the following design criteria for assessing the chart, you can find the best design for your specific application. Single design may not meet all the required services, but to make the right choices for each application in most of the important features or conditions are met. The following chart compares the design to make a comparative assessment.

2015年10月18日星期日

Rolling mill bearing, means for rolling industry

SKF super-precision bearing can help OEMs and end users to further optimize performance parameters of their equipment and applications. Depending on the bearing series and applications, its advantages are also varies, but always including high-speed and carrying capacity, bearing a long service life, long maintenance intervals, low energy consumption.
Rolling mill bearing, means for rolling industry, namely non-ferrous metals, ferrous metals and non-metallic products rolling. For bearing the roll diameter at the calender rolls and rollers. Usually four cylindrical roller bearings under radial load, thrust roller or thrust ball bearings and angular contact ball radial or radial roller bearing axial load. Now they use or the way mist lubrication oil lubrication and grease for lubrication cooling.



2015年10月14日星期三

Machine tools and other applications requiring high precision bearings with excellent performance.

Machine tools and other applications requiring high precision bearings with excellent performance. Wide range of speed capability, maintaining high rotation accuracy, high system rigidity, low heat generation, low noise, low vibration level, but some of the many requirements.
Rolling general industrial applications can only meet part of the requirements. Therefore, SKF manufacturing a full line of super-precision bearing.
SKF super-precision bearings can help OEMs and end users to further optimize performance parameters of their equipment and applications. Depending on the bearing series and applications, its advantages are also varies, but always including high-speed and carrying capacity, bearing a long service life, long maintenance intervals, low energy consumption.
Slewing bearing is nearly four decades the gradual rise in the world of new mechanical parts, which have inner and outer rings, rolling, etc., at present, our stereotypes production of slewing bearings, mainly in the early 1980s designated by the Ministry of Machinery Industry Tianjin Engineering Machinery Institute organized introduction of the original Federal Republic of Germany Rothe Erde company's design and manufacturing technology.