BMH-22i The new BMH-22i inverter stud welder is a multifunctional High-Tech development perfectly suitable for stud welding, electrode welding and TIG welding. Its performance and quality features are unequalled in stud welding technology. The lightweight stud welder in compact design allows the safe and problem-free welding of studs up to M24 (7/8“). This stud welder has only one fifth the weight of comparable stud welders and features high technical performance due to an extremely steady arc. The adjustability of all important welding parameters and easy operation via membrane keyboard with display allow optimum technical comfort and first-rate welding results.