Luoyang Longda Bearing Co., LTD, was established in 1999, located in Yiyang bearing industrial zone in Yiyang county, Luoyang City, Henan Province, China. It covers an area of 23 acreage. LDB®is the registered trademark of it's products.LDB company has more than 60 staffs, which including a group of experienced slewing bearing designers and skilled workers team.

The company has almost 30 CNC machine and testing facilities, with these equipment LDB can produce slewing bearings diameter range from 150 mm to 4000 mm.  It is cover the production and manufacturing of various brand models of excavator slewing bearings, truck crane slewing bearings, all terrain crane slewing bearings and aerial work platform slewing drive.

In the year of 2019, LDB passed the certification of ISO 9001:2015 quality management system certification, this certificate comes from south German, TUV, who has strictly standard for the qualified enterprise, It tested the production process from raw materials incoming to finished products. At the end, it covers LDB has strict process control and quality control, with various type  of slewing bearings, inventory sufficient.

Company's products have been exported to more than 73 countries and regions in the world, mainly exported to the United States, Canada, Trinidad and Tobago, Colombia, Brazil, Chile, Peru, Argentina, Guyana, Ecuador, UK, France, Norway, Sweden, Italy, Belgium, Finland, Poland, Austria, Russia, Ukraine, Estonia, Latvia, Lithuania , Serbia, Bosnia and herzegovina, Turkey, Iran, South Korea, India, Vietnam, Singapore, Malaysia, Thailand, Sri Lanka, Bangladesh,  Australia, New Zealand, Fiji, Mozambique, etc.