China Construction Machinery economic crisis poses a major challenge

Although China's economic slowdown , China 's construction machinery industry is also facing major challenges, but China is still the world's largest construction machinery market , our future development  of this market is still full of confidence. " The world's largest construction machinery giant Caterpillar Group President and Chief Financial Officer Edward ? Leip said recently in Shanghai , the largest in the history of Caterpillar to participate in Shanghai BMW Exhibition , highlighting its commitment to long-term development in China and the Chinese market confidence.
China International Construction Rolling mill bearing Machinery , Building Material Machines , Construction Vehicles and Equipment Expo , namely Shanghai BMW Exhibition (baumaChina) began in 2002 , held once every two years , is designed to help exhibitors develop business in China and Asia markets . According to reports, Caterpillar in the exposition area of ​​over 12,000 square meters exhibition hall , displaying   nearly 50 machines are widely used in the Chinese market , a variety of services and technologies , including six new products. To fit China 's "second five" industrial planning , the exhibition is divided into Caterpillar road contact angle measurement construction , irrigation , urban construction , railway construction, quarrying and energy industries , and other six exhibition.
Edward ? Leip said that although China's economy has slowed, but it is built on the basis of previous high-speed development , the next 10 to 15 years is still a great opportunity , "We will not adjust short-term economic downturn in China long-term strategy , " Not long ago, Caterpillar updated the company's China strategy: the Chinese win. To establish itself in China market , Caterpillar focus on creating local supply chain , there are 30 Chinese suppliers , also in Hong Kong to issue renminbi debt. This year, the company also actively interact with customers in China on Weibo , while speeding up the pace into the Chinese countryside.

when used to carefully adjust the clearance, change the bearing inner and outer axial distance

Angular contact ball bearings Jixiang heart Thrust Ball Bearings , as can be loaded more of the ball, the radial load carrying capacity greater than the ordinary ball bearings , can withstand machine tool spindle large axial load or bear the pure axial load, which allows work speed and bearing deep groove ball bearing similarities more rigid , but requires precise  installation for misalignment error is very sensitive, it is generally not used alone to bear radial load , radial load while at the same time will bring additional axes to the load . This variant bearing many varieties of applications is very broad, often made with 15 °, 25 ° and 40 ° contact angle of three kinds of series, the greater the contact angle , the higher the axial load capacity , but should be used at high speed small contact angle is appropriate.
Most of these bearings in pairs for  a small span rigid double precision spindle bearing axis or , when used to carefully adjust the clearance, change the bearing inner and outer axial distance  , you can adjust the bearing internal clearance , while the several sets of bearings installed in parallel and give some preloaded amount , can improve the rigidity of the bearing system .
This type of single bearings can super-precision bearing withstand axial load in one direction , while others need to be configured in order to offset the additional axial bearing force when it is made on the installation of additional axial force which cancel each other out , and can withstand up two forces axial load , and has two strong axial direction limit ability to be installed in pairs generally use two sets of bearing outer race wide face with its relative ( back to back ) or a relatively narrow end ( face to face ) two installation forms , where rigid bearing  system taper roller bearing mounted back to back best . For ease of installation in pairs or groups , some bearing factory  supply in pairs, a group of three and four sets of a group such as bearings , bearing the same batch so that the supply of processing consistency, use  bear the load more evenly , additional axial forces cancel each other more  thoroughly .
This type of bearing and non- separable non-ionic type two, the separation of bearings for restricted installation conditions , requirements from the entire outer or inner ring bearings were installed in order to remove the case , since the separation of angular contact ball bearings are widely used in magnetic motor , it is also known as magneto bearings. This type of bearing on the inner ring in the locking variety, can be adapted to higher speeds .