The Use of Ceramic Ferrules in Drawn Arc Stud Welding

Stud welding is a widely used manufacturing operation for connecting various components, support structures, assemblies, and composite construction. While there are many applications for various types of stud welding, drawn arc stud welding in particular is used for heavy-duty construction using studs with dimensions typically larger than ¼”. Drawn arc welding studs also utilize a ceramic ferrule in the bonding process. This ferrule helps create a bond that is stronger than both the welding stud and the material being welded to. When you work with Northland Fastening Systems for all your drawn arc stud welding projects, you have access to all the high-quality studs, welding tools, and accessories you need.


Working with a ceramic ferrule to establish strong bonds using the drawn arc stud welding process requires specific tools and practices including a drawn arc gun and calibrated unit, drawn arc studs, ceramic ferrule sized correctly, and an adequate power source.


How it works: The ceramic ferrule works to surround and contain the welding stud during the weld. As the drawn arc current heats the tip of the stud and the metal becomes molten, the ring-shaped ferrule keeps the metal from spreading into a messy weld. The ceramic ferrule also protects the weld from exposure to oxygen in the air. Oxygen exposure can lead to porous or weakened welds. Additionally, the ferrule creates a protective barrier reducing UV exposure. Once the weld is complete, the ferrule is chipped away leaving a clean, perfectly formed weld.


Ceramic ferrules are required for drawn arc stud welding because the process is a longer weld time than other welds, the welding studs are typically thicker in diameter, and the weld will be required to hold greater weights than other welding formats.


Short cycle welding uses inert shielding gas instead of ceramic ferrules, and CD stud welding uses a different process entirely that doesn’t have the risk of molten metal spread. Instead, CD welding uses an exact combination of pressure and current frequency to heat the metal stud and bond it to the surface material.


If you’re working with drawn arc stud welding operations on your job site, Northland Fastening Systems can provide all the studs, accessories, and welding tools for rent or purchase you might need from the start of your project to the finish.


To learn more about drawn arc stud welding and the use of ceramic ferrules, contact Northland Fastening Systems today at (651) 730-7770, and feel free to explore our selection of drawn arc welding studs or other items online or request a quote.