Rio 3-Kilo Automatic Melting Furnace
Item Number: 704053
Efficiently melt non-ferrous alloys for casting and ingot-pouring. Simply lift out the crucible with the supplied tongs and easily pour the molten metal—no need to lift a heavy melting unit! Imported for Rio Grande.
• Brushed steel and powder-coated steel housing for long shop life.
• LED display with touch pad digital readout allows precision temperature control to 2012°F (1100°C); reads in Fahrenheit).
• Insulated lid holds heat in, keeps oxygen out for a cleaner melt.
• The grooved graphite crucible is designed for easy removal from the furnace using specially designed crucible tongs (included).
• Machine weight: 14.4 lbs.
Model or style no.:
110 volts, 50/60Hz, 1700 watts
5-3/4"W x 7-1/2"D x 13"H (146 x 191 x 330mm)
Gold: 2799g (90 troy oz.)
Country of origin:
2013 Tools and Equipment Catalog p.509
How To Determine Metal Weight for Wax Trees
Knowing how to determine the correct metal weight for each wax tree before you cast ensures that you melt the right amount of metal for your cast, making your casting process more cost-effective and more reliable.
24KY = 19.32
18KY = 15.58
14KY = 13.07
10KY = 11.57
Fine silver = 10.49
Sterling = 10.36
Platinum = 21.54
Caster's brass chunks = 8.4
Caster's white bronze chunks = 8.1
Ancient bronze = 8.8
Yellow bronze = 8.4
Manganese bronze = 8.3
Nickel silver = 8.8
Alpaca = 8.6
First, weigh your wax models along with main and gate sprues. Then add an additional 10% to account for your button.
Multiply that total by the specific gravity of the metal you're casting (see table above for a general guideline).
Example: For a 5-gram wax model, add 0.5 (10% of 5g) to get a total wax weight of 5.5g. For a 14KY gold casting, multiply 5.5g x 13.07 s.g. The amount of 14KY gold needed for this tree is 71.89 grams.