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Context in the complex and volatile international political and economic situation, bearing industry experience in 2010 after years of rapid growth, low momentum after last year ago, the industry go into a stage of structural adjustment and rational return.
Bearings are significant, key components in the equipment manufacturing industry, directly determines the important equipment and host performance, quality and reliability of products, known as equipment manufacturing "heart" part. After years of development, China bearing industry has formed a considerable size, 2010 National bearing industry production value of about 130 billion yuan, ranked the third largest in the world. Although China bearing industry is already very big, but the vast majority are concentrated at the lower end, in higher-end bearing manufacturing areas, considerable gaps still exist in China compared with developed countries.
Rolling bearing is the operation of sliding friction between the shaft and shaft seat into rolling friction, thereby reducing the friction loss of a precision mechanical parts. Rolling bearing General by within ring, and outer ring, and scroll body and keep frame four part composed, within ring of role is and axis phase tie and and axis together rotating; outer ring role is and bearing block phase tie, up support role; scroll body is with Yu keep frame uniform of will scroll body distribution in within ring and outer ring Zhijian, its shape size and number directly effect with scroll bearing of using performance and life; keep frame can make scroll body uniform distribution, prevent scroll body shedding, boot scroll body rotating up lubrication role. Commercial intelligence networks in 2012-2016, published by investigation and market prospect of China bearing industry consulting report data displays: the first half of 2012, of national rolling bearing capacity of 8.375 billion, an increase of 7.21%. In June, China's manufacturing rolling bearing 1.738 billion, an increase of 9.35%.
From provinces and cities seen in the production of the first half of 2012, yield 2.986 billion sets of rolling bearings in Jiangsu Province, an increase of 6.96%, 35.65% of the total national production. Closely followed by the provinces of Zhejiang, Shandong and Shanghai Municipality, production, 11.16%, and 29.42% respectively.
The machine components, the underlying manufacturing processes and materials "Twelve-Five" strong development planning clearly driven, radiation of high-speed, precision, heavy duty bearings and other machine components as "Twelve-Five" development of key industries, to improve performance, reliability and life of main directions, strive to reach or approach international advanced level. The plan also noted that policy support, by 2015, the bearing industry sales will reach $ 222 billion yuan, an average annual growth rate will be between 12%-, high end bearing of high-speed, precision, heavy load growth will be faster.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| 4T-LM12749+/LM12711++ NTN | 21.986 | 45.974 | 16.637 |
| 4T-M86649/M86610 NTN | 30.162 | 64.292 | 21.433 |