
3 litre heated digital ultrasonic cleaner — 40 kHz cavitation that reaches inside settings a brush cannot.
Tank capacity3 L
Gold-industry machinery for jewellers and bullion traders
info@vortexscientific.com
Vacuum pressure casting machine that melts the charge and draws it into the flask in one cycle.
Price as of 9 September 2026
Catalogue enquiry · No online payment · Delivery and installation worldwide
The Jewellery Making — also written jewelry making machine, or the Vortex casting machine — melts a charge under vacuum and then pushes it into the flask under positive pressure, in a single sealed cycle. Pulling the air out before the pour is what removes the porosity that shows up as pinholes on a finished surface, and it is the difference between a casting that polishes clean and one that has to be recast.
The chamber takes a standard perforated flask. Temperature is set and held rather than judged by eye, so an alloy is poured at the same point every time — which matters most on karat golds, where overheating burns off zinc and quietly shifts the composition of metal you are about to sell by weight.
It suits a workshop casting its own rings, settings and findings in batches, rather than a retail bench melting buy-back into bar.
| Process | Vacuum melt with positive-pressure casting |
|---|---|
| Melt capacity | 2 kg gold, 1 kg silver |
| Maximum temperature | 1400 °C, set and held |
| Flask capacity | Up to 100 mm diameter × 150 mm tall |
| Casting pressure | Up to 3 bar |
| Cycle time | 8–12 minutes from cold, depending on charge |
| Power supply | 220–240 V, 50/60 Hz, single phase |
| Rated power | 3.5 kW |
| Dimensions (W × D × H) | 520 × 480 × 900 mm |
| Net weight | 78 kg |
| Warranty | 24 months |
Specifications are subject to change. Confirm the current build with us before ordering.
For casting, no — the Jewellery Making melts and pours in one cycle. If you also consolidate scrap into bar, a dedicated melting furnace is faster for that job and leaves the casting machine free.
Usually the investment rather than the machine: a flask that has not been burnt out fully, or one poured too cold. Confirm the burnout schedule and the flask temperature at the pour before suspecting the vacuum circuit.
Yes, at a lower charge weight — silver is less dense, so the same crucible volume holds about half the mass. Silver also oxidises more readily, which makes the vacuum stage more useful rather than less.
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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 Making
USD 3,400