... stepless current adjustmen; High efficiency, simple structure, easy to operate and maintain. Use general electrode, welding ferrous metal work ... )630Cueeent range(A)120-630Insulation classFApplied welding rod(mm)3.2-8.0Duty cycle(%)35Dimension(mm)660*500* ... , deep penetration, ensure good welding quality;High efficiency, simple structure, easy to operate and maintain. BX1 630 AC Arc Welding Machine