August 24，CCTV broadcasts special programs《Work hard and earnestly·Big province takes on the responsibility bravely》，It is reported that China Railway Construction Heavy Industry has achieved a new breakthrough in the key technology of the main bearing of the roadheader，Build domestic super underground engineering equipment“The heart of a king”。

The specific report of CCTV is as follows.：

In the Second Industrial Park of Railway Construction Heavy Industry，There is a room codenamed“197”The factory building。Here，7 independently developed and manufactured.The main bearing of 6m super-large diameter roadheader is offline and has passed the acceptance。

The main bearing is referred to in the industry as a roadheader“ Heart ”，Chiseling through the mountains、In the March across the river and the sea，The roadheader relies on it to drive the cutter head to rotate continuously.，Push forward。It is the only part of the entire tunneling equipment that cannot be replaced during service.，Once the integrally formed structure is damaged,，Roadheaders worth hundreds of millions of yuan are facing the danger of being scrapped.，The cost of the whole project will also increase exponentially.。

The main bearing is at the top of the large high-end precision bearing industry chain.，Because of the material、Design、Manufacturing and testing are extremely difficult.，Foreign countries monopolize it for a long time.，Not only is the price up to tens of millions of yuan,，Technology、Production and services are often controlled by others.。

To break foreign monopolies，China Railway Construction Heavy Industry Co., Ltd. set up a research and development team，Carry out independent research on main bearings，Hundreds of materials and processes have been tried，Tens of thousands of sets of data were analyzed，Many difficulties have been overcome.，So that that main bear can bear the pressure of ten thousand tons、Scroll the target for more than 10,000 hours.。