Notch,bead,crimp and roll complete round starting collars, 3" to 14" in diameter out of 24 to 30 gauge galvanized - in only one pass! Just cut to width and length or use scrap. This machine uses either 3" or 6" width blanks with simple movement of the crimp roll.
The Tin Knocker line of sheet metal working machinery was specifically developed to meet the needs of the small to medium sized HVAC contractor. The line is unique in that it is the only line which has all machines necessary to set up a complete HVAC sheet metal shop. Some machinery manufactures make roll formers, but not shears and brakes. Others make slitters or beaders, but not shears, brakes or roll formers.