Most seam welders use water cooling through the electrode, transformer and controller assemblies due to the heat generated.

An important feature of the Dorman Seam Welder is the optional heavy duty current collector wheel spindle bearing.

A resistance seam welder bearing mechanism must transmit thousands of amperes from a stationary housing to a rotating shaft on which is mounted the circular welding electrode.

The key advantages of a tube vs. a railway track are that it can be built above the ground on pylons and it can be built in prefabricated sections that are dropped in place and joined with an orbital seam welder.