The mixing arm drives the mixing blade to force the mixing of the material in the tank body, the mixing effect is very strong, and the mixing quality is better.There are two steel bearing protection circles between the mixing arm and shaft.to prevent coarse sand.In the steel circles there is a airway. When certain pressure of air goes though it,a pressure protection mat will be formed between the interface of the mixing arm and shaft to prevent water and mud from close to shaft head and prolong the service life of the mixer.
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Jinxi’s axles are basically in a similar situation. Taking the 2010 business as an example, its axle business accounted for 31% of its main revenue, but its gross profit margin was only 4.56%. In addition, its business also included vehicles, wheelsets and vehicles. And forgings.
At the end of 2010, this company also had four consecutive daily limit due to the high-speed rail concept. However, the actual situation is that the company has nothing to do with high-speed trains and high-speed rails. Earlier, Jinxi Axle Director Zhou Haihong told reporters in an interview that the company's products are currently mainly used in trucks, vacuum axles for high-speed rail still in the test, the material through the Ministry of Railways certification will take time.
In the railway industry chain, many core components are not domestically produced. Axle is just one example. Jinxi axles are still on the technical level of manufacturing trucks and subway axles, while high-speed rail axles are all imported products.
The bearing industry where Tianma shares is also an example. At present, the high-speed rail EMUs used in China are basically monopolized by foreign-funded enterprises such as SKF (Swedish), FAG (brands of Schaeffler, Germany), Timken (US Tieken) and NSK (Nippon Seiko). Domestic enterprises have not yet entered the tendering system for EMU bearings of the Ministry of Railways.
According to industry insiders, on the one hand, the railway industry is an equipment manufacturing industry with no technical advantages, low gross profit margin, and low added value. On the other hand, the rapid development of the railway information industry is entirely dominated by several small companies.
In this lack of competition, product gross margins are extremely high. According to financial data, the gross profit rate of the glorious technology railway communication signal industry products is 51.2%, of which the gross margin of the signal centralized monitoring system is 49.64%, the gross margin of the wireless shunting signals and monitoring system is 53.12%, and the gross margin of the railway disaster prevention safety monitoring system is 54.62%.
In the A-share market, of the more than 2,000 listed companies in 2010, only 238 had a gross margin of over 50%, accounting for 11.9%.
Special bearings China's high-speed rail car bearing few foreign monopoly
At present, the reporter learned that the bearings of the EMUs of China's high-speed rails are basically monopolized by foreign capital, and domestic enterprises have not yet entered the tendering system for EMU bearings of the Ministry of Railways.