Threaded Electrodes

Threading a refractory composite

Cutting a clean thread in tungsten copper is a quality-control problem more than a machining one: the copper phase tears easily, and a torn thread root becomes a stress riser exactly where gun vibration concentrates. Our thread cell runs fifteen lathes dedicated to this work, with go/no-go thread gauges checked per batch — because a thread that gauges true on arrival is the only thread that screws into your gun the first time.

Metric and UNC/UNF forms are routine; special forms, left-hand threads and tapered shanks are cut to drawing. Dimensional inspection records accompany each batch on request.

Design notes for gun integration

The threaded joint in a welding gun does three jobs at once: it carries welding current, it holds electrode force, and it must release for tip changes without galling. Thread fit class matters here — we cut to the class your holder was designed around, and we can hold it batch after batch because the same lathe programs run every order.

For automated stations, consistency beats everything: an electrode that seats identically every time is one that does not force a re-teach of your robot cell. Repeat orders are machined to the same program and the same drawing revision, so seating behavior never drifts.

Failure modes worth knowing

Threaded W/Cu electrodes rarely fail at the thread; they fail at the face, from mushrooming and coating pickup — the same wear physics as every resistance-welding consumable. What threads do fail from is cross-threading at tip changes and vibration loosening in guns without the right seating torque.

If your consumption pattern shows thread damage rather than face wear, the fix is usually seating practice or holder design, not alloy. Send us the failed electrodes — a photo of the wear face tells us more than a purchase order does.

Related: Resistance welding electrode applications