The main shaft is the key part of the precision optical coordinate boring machine. The radial swing error of the inner and outer bearing should not exceed 2 / 1000 mm. Under the condition of high-speed operation, the temperature rise of the bearing should not exceed 15 ℃. At that time, only a few Western countries were able to manufacture this kind of high-precision bearing.

Today's Luo axis is still the gold signboard of "China axis". Luozhou has the first batch of enterprise technology center and the only national key laboratory in the bearing industry recognized by the state. Henan Province high speed and heavy load bearing engineering technology research center and Henan Province bearing product quality supervision and inspection center are also located here, which has built a perfect bearing research and development experimental platform.

At present, the product has also passed the durability process test of 1.2 million km. The results show that the new generation of "China bearing" meets all kinds of strict standards and successfully breaks through the technical bottleneck that has been stuck in the neck of China's high-speed rail.

It is undeniable that the development technology channel of high-speed railway bearing has been formally opened for Luozhou shaft, and the basic conditions for mass production of high-speed railway bearing have been met. In order to meet the strict requirements of high standards, only a few Western countries, such as Germany, were able to manufacture this kind of bearing, but now the last layer of paper has been pierced by the axis, which marks that China has broken the Western monopoly on high-speed railway bearings.