
Handheld thermal-conductivity probe that separates diamond from common simulants at the counter.
TechniqueThermal conductivity
Gold-industry machinery for jewellers and bullion traders
info@vortexscientific.com
Pulse-arc spot welder with stored programmes for gold, cobalt-chrome and titanium work.
Price as of 9 September 2026
Catalogue enquiry · No online payment · Delivery and installation worldwide
The Jewellery Welding Machine — also written jewelry welding machine, or the Vortex jewellery welder — joins precious metal with a short, high-current pulse delivered through a fine electrode under argon. The weld is small and the surrounding metal stays cool, so a claw can be rebuilt or a chain link closed without unsetting a nearby stone or annealing the piece.
Power is set as a percentage and pulse length in milliseconds, and both are stored per programme — the front panel carries presets for gold, cobalt-chrome, hybrid alloys, titanium and orthodontic work. Saving a setting per job type is what makes a repair repeatable rather than a matter of judgement each time.
It suits a repair bench that handles findings, chain, claw work and spectacle or dental frames. It is a spot welder, not a laser: it excels at tacking and building up small areas, and a seam weld along a long joint is slower work than on a fibre laser.
| Process | Pulse-arc spot welding under argon |
|---|---|
| Stored programmes | Gold, cobalt-chrome, hybrid, titanium, orthodontic |
| Power setting | 1–100%, in 1% steps |
| Pulse duration | 1–50 ms, in 1 ms steps |
| Electrode diameters | 0.4, 0.6, 0.8 and 1.0 mm collets supplied |
| Shielding gas | Argon, regulator and filter supplied |
| Power supply | 110–240 V, 50/60 Hz, single phase |
| Dimensions (W × D × H) | 290 × 200 × 250 mm |
| Net weight | 9.5 kg |
| Warranty | 24 months |
Specifications are subject to change. Confirm the current build with us before ordering.
In most cases yes, which is the main reason to own one. The pulse is short enough that heat does not travel far from the weld. Treat heat-sensitive stones with the usual caution — emerald, opal and anything fracture-filled deserve a heat sink or unsetting.
For clean welds on gold and titanium, yes. Without shielding gas the weld picks up oxygen and goes dull and brittle. The regulator and filter are supplied; the cylinder is bought locally.
A pulse-arc welder puts energy through a physical electrode touching the work; a fibre laser does it with a beam through a microscope. Arc welding is far cheaper and very good at tacking and building up small areas. A laser gives a finer, more controllable weld and is faster along a long seam.
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Handheld thermal-conductivity probe that separates diamond from common simulants at the counter.
TechniqueThermal conductivity

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Talk to us
Tell us your shop size, your power supply and what you melt or test in a day. We will tell you which machine fits — including when the answer is the cheaper one.
Jewellery Welding Machine
USD 1,800