Double row tapered roller bearings can carry heavy loads and are stiff. They are suitable for the accommodation of combined (radial and axial) loads and can locate a shaft axially in both directions with a given axial clearance or a given preload. Their main use is in gearboxes, hoisting equipment, rolling mills and machines used in the mining industry, e. G. Tunnelling machines.
Dalian Metallurgical Bearing Group is one of the top 500 biggest machinery enterprises in China, and it is also approved by the Ministry of Metallurgy as the "National Top Ten Brands". The DYZV Brand is famous in all provinces in China and has also been marketed worldwide to more than 60 countries, including USA, Canada, Australia, Russia, India and South Africa. The Company which occupies 770, 000 square meters the assets of over1 Billion RMB Yuan, has the capability of producing over 2, 000, 000 bearings annually for the Mining Industry, Port Machinery, Chemical and Petroleum Industries. The Research and Development department has more than 300 engineers constantly working on improving the DYZV products as customer's requirements. The products have already exceeded National standards. The World Bearing Center in USA has verified that the DYZV bearing product has reached the level similar to products from European Bearing manufacturers, through the tests of precision, reliability and lifespan. In March 1998, the company was awarded ISO 9002 certificate, and ISO 9001-2000 certificate in October 2001.
