Tooltos Alumina Clay Crucible Bowl | 65x28mm, Gold Silver Copper Smelting
- 95 in stock
Description
Key Selling Points
- Alumina clay construction withstands the high temperatures required for smelting gold, silver, copper, aluminum, and brass — alumina clay is a proven refractory material used in traditional crucible making
- Bowl shape (65mm diameter x 28mm deep) provides a round, open vessel suited for melting small-to-medium quantities of metal and pouring directly from the crucible
- Compatible with fuel furnaces, kilns, natural gas furnaces, coke ovens, and coal furnaces — works across the common furnace types used in jewelry and metalworking studios
- Lightweight at approximately 27g — easy to handle with crucible tongs during and after heating
About This Crucible Bowl
The bowl-shaped crucible is the standard vessel for small-batch metal melting in jewelry and metalworking studios. The 65mm diameter and 28mm depth provide enough capacity for melting small quantities of precious metal scrap for re-casting, alloying, or refining, while remaining small enough to heat quickly in a bench-top furnace or with a torch. The round bowl shape allows the molten metal to pool centrally, making it straightforward to pour into a mold or ingot form.
Alumina clay is a traditional refractory material that handles repeated thermal cycling well and does not react with gold, silver, or copper at typical jewelry casting temperatures. It is more robust than quartz for general workshop use and better suited for the bowl form factor where the vessel needs to hold a volume of molten metal rather than just channel it. The 65mm bowl is a practical size for jewelers melting scrap metal, casting small ingots, or preparing alloys for rolling or drawing.
Best For / Not For
| Best For | Not For |
|---|---|
| Small-batch melting of gold, silver, copper, aluminum, and brass for casting and refining | Large-volume production melting — the 65mm bowl is suited for small studio quantities |
| Melting scrap precious metal for re-casting into ingots or casting directly into molds | Sudden temperature changes — always preheat gradually and avoid cold contact when hot |
| Use with gas, fuel, coke, coal, and kiln furnace types | Repeated use with highly reactive metals or fluxes that can erode the clay body over time |
Technical Specifications
| Material | Alumina clay (refractory) |
| Dimensions | 65 x 28mm (2.6 x 1.1 in) |
| Weight | Approx. 27g (0.95 oz) |
| Compatible Metals | Gold, silver, copper, aluminum, brass and non-ferrous alloys |
| Compatible Furnaces | Fuel, kiln, natural gas, coke, and coal furnaces |
Pro Tips
- Preheat the crucible at a low furnace setting for several minutes before bringing it to full temperature — gradual heating prevents thermal shock cracking.
- Season a new crucible before first use by heating it empty to working temperature and allowing it to cool slowly — this helps stabilize the clay body and extends service life.
- Place the hot crucible on a heat-resistant ceramic or refractory brick surface after removal from the furnace — never on a cold metal surface, concrete, or near water.
- Inspect the crucible for cracks before each use — a cracked crucible can fail during heating and release molten metal unexpectedly. Replace if any cracks are visible.
- Dedicate separate crucibles to different metals where possible — residue from one metal can contaminate the next melt if the same crucible is used for multiple metal types.
Frequently Asked Questions
What is the difference between this bowl crucible and a crucible boat?
The bowl crucible (65 x 28mm) is a round, deeper vessel suited for melting a volume of metal and pouring from the bowl. A crucible boat is a long, narrow, shallow channel suited for very small quantities and assay work. Choose the bowl for general melting and casting; choose the boat for small-quantity or analytical work.
How many times can this crucible be reused?
Service life depends on the metals used, furnace temperatures, and how carefully the crucible is handled. With proper preheating, gradual cooling, and careful handling, alumina clay crucibles can be reused multiple times. Inspect before each use and replace if cracks appear.
What if I have questions after receiving the crucible?
Contact the Tooltos team at sales@tooltos.com. We respond within 24 hours on business days.
What's Included
- 1 x Alumina clay crucible bowl (65 x 28mm)
Support
Questions about furnace compatibility or order status? Contact the Tooltos team at sales@tooltos.com. We respond within 24 hours on business days.
