What Is A King Pin

The LUEN 5th wheel kingpin, as the core component that connects the semi-trailer to the drawbar and carries the towing force, is closely fitted to the fifth wheel. Depending on its diameter, the fifth wheel kingpin is divided into two sizes: 50 mm and 90 mm, and depending on the mounting process, it is divided into welded and assembled types. The materials used are generally high-strength carbon and alloy steels, which are moulded by a precision forging process.

In terms of load carrying capacity, we have set a benchmark of 50 tonnes as the limit of differentiation. For total weight (including trailer and cargo) not exceeding 50 tonnes, 50# pins are recommended; once this weight is exceeded, 90# kingpins are used; and for extreme heavy loads, such as total weight exceeding 90 tonnes, 90# pins are recommended for safety reasons to ensure a solid connection.

We invite you to consult our team of specialists if you have any doubts about purchasing a LUEN brand 5th wheel kingpin. Based on your specific vehicle parameters and usage needs, we will recommend the most appropriate pin purchase plan. Alternatively, you can visit and purchase LUEN's high quality fifth wheel pins directly by clicking on the links provided below.

Quick Purchase Link：https://www.cnluen.com/King-Pin-pl3708979.html