Excellent quality is a trademark of Jiangsu shuangzheng products. The
quality management of jiangsu shuangzheng machinery company is certified according to ISO 9001-2015. To achieve and maintain these high standards, shuangzheng uses advanced Finite Element Methods (FEM) as well as Failure Mode Effects Analysis (FMEA). These high standards also continue with the choice of suppliers and through after-sale service.
All individual components of the large diameter bearings are selected according to the application, and are subject to the highest quality standards. Raw parts and components are only supplied from qualified suppliers, who are audited regularly. For certain raw materials, such as rolled steel rings, our own company standards apply which go beyond the common industry standards.
The design of each diameter slewing bearing is largely determined by the expected environmental conditions. In this respect, in addition to the usual 42CrMo4 alloy & 50Mn & C45,shuangzheng also uses steels with adapted alloy components as a base material for bearings in low temperature applications. Upon request from the customer, bearing cages made from steel or brass alloys can also be used in place of polymer spacers. The special sealing systems and coatings for reliable protection against corrosion and increased wear are in constant further development by shuangzheng. The lubrication ports are arranged as required and depend on the adjacent structure interface. Gearing is predominantly designed as spur gearing, but helical and worm gears are also possible.
All of our slewing ring bearing are produce according to China standard <JB/T 2300-1999 >.Often times, classifications and certifications are required by certified bodies for specific applications. Some examples of these certifications are:
• China Classification Society (CCS)
• American Bureau of Shipping (ABS)
• Bureau Veritas (BV)
• American Petroleum Institute (API)
Different countries have different standards, and generally Chinese marine products use CCS standards. The BV standard is widely used internationally.
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