... option Welding Roller is used for welding, polishing, glue-lining & assembling the cylinder body. It has several types for option: adjustable, self ... -aligned, screw type, tilting, anti-creep type, etc.Adjustable welding rotator: the center distance of the wheels on the ... the rangeScrew welding rotator: it adopted screw to adjust the roller distance to be suitable for different diameter can be rotating ...