Adjustable welded roller carrier is driven by double motors in the mode of cycloidal pin gear decelerator or WHCW.According to users'needs, the center distance of the roller can be adjusted through the reserved screw hole or lead screw,to ft for the changes in workpiece diameter. The roller is made of rubber,steel or ther combination;For the control system,there are touch-tone digital control type,switch digital control type and switch relay digital control type (mainly used for argon arc welding equipment)to be selected,and linkage control with other equipment is allowed.The roller cariers are mainly used for cylindrical weldment and also can be applied in the fiting and welding of cone and sectional & unequal-diameter rotator by cooperating with other tools.As a result,the product is widely used in wind power.pressure vessel,petrochemistry, pipeline,sleel structure,boiler,shipbuilding,overlaying welding repair and other industries.With regard to160t-600t rolle