SPT-505 self-balancing wire feeder boom is a self-balancing space arm designed for welding stations, using spring balancing technology, simple operation to reduce labor intensity, and greatly improve the flexibility and efficiency of welding operations. It can be folded and stored, and the wire tube and wire feeder are suspended on the arm, which can be used to organize the clutter in the workshop, avoid the wear of the wire pipe, and greatly reduce the potential safety hazards and unnecessary maintenance costs in the workshop. It is an ideal choice for welding stations and workshops such as electrical appliance manufacturing, sheet metal fabrication, road machinery manufacturing, etc.