Further topics – discover more in our Knowledge Center and on our website!
FAQs
Which generator do I need for my stud welding machine?
The required generator output depends on your welding current. Our diagram shows you the minimum power – choose a generator above the purple marking to ensure consistent welding quality.
What cable length is allowed for drawn arc stud welding?
Use our diagram: find your welding current and cable cross-section – this will show you the maximum permitted length for optimal welding results in drawn arc stud welding.
How do I set the right welding parameters?
Perfect weld joints are no coincidence – they result from correctly adjusting five key parameters. In our video, our expert explains how welding current, process time, stud protrusion, lift height, and damping work together, and why tailoring them to the material and environmental conditions is the key to success. Discover how the right settings can help you achieve optimal results every time.
Video Expert Sessions
Welding specialist Michael Krämer (EWS | IWS) demonstrates the practical side of stud welding in four videos: gun settings, positional welding, and welding studs onto beams.
Experience KÖCO technology from the very first step to the perfect result – watch the videos now!
Operating Instructions
Glossary
Here you’ll find all the key information on operating your KÖCO equipment. Each manual is clearly explained, showing you how to make the most of your equipment and achieve perfect welding results.
Weld time
The weld time is the time from which the arc is ignited until the molten surfaces of the stud and workpiece meet.
Stud welding machine
The stud welding machine acts as a welding current source and, together with a stud welding gun, is designed to mate cylindrical studs on metal surfaces (stud welding). Due to the diversity of products, welding studs ranging from a few millimeters through to two centimeters in diameter may need to be processed in consistent quality. The smallest machines are ideal for manual workstations or for hard-to-reach points on construction sites. The largest machines are predominantly designed for power and speed.
Stud welding inverter
The welding inverter is a complex, high-quality welding current source with a compact design, extremely light weight, and which also enables the precise control of the voltage and frequency of the welding current. In addition, various comfort functions support the user in their work, such as with the automatic adjustment of the welding parameters after entering the sheet thickness, material, and desired welding method. This makes it a transportable universal solution for almost all welding methods and enables professional joining, even for beginners.
Stud welding gun
The stud welding gun is a standard tool in metalworking and, together with a connected stud welding machine, is designed to mate cylindrical pins on metal surfaces (stud welding). A safe and ergonomic design that is easy to use makes it ideal for every skill level and allows studs to be welded on wherever large and bulky components cannot be clamped into a machine tool.
Threaded stud
The threaded stud is a cylindrical pin with metric thread. It is suitable for screw-mounting removable components, such as cladding, formwork, insulation, or the like with the advantage that assembly and repair are both made easier.
Drawn arc stud welding
Stud welding with an ionized arc works with the brief application of a high DC voltage. When the welding process is triggered, a low current is activated, the stud is raised off the workpiece and an arc skips across. This arc melts the contact points of both materials and the welding stud is then pressed on. When the welding stud comes into contact with the workpiece, the arc disappears and the voltage is switched off. The weld pool cools and hardens. Fusion is complete.
In stud welding with a ceramic ferrule, the welding stud has a small aluminum ball at the bottom. This burns within milliseconds as soon as the welding current is switched on. This converts the oxygen present at the welding site completely into chemically neutral aluminum oxide, which prevents unwanted oxidations at the weld.
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