The Mountain Goat Trommel is a reverse helix system built on the same principle as the huge mining trommels used by large mining companies all over the world, but this is light and portable. It is not to be confused with gravel pit trommels, though, which are designed to classify gravels.
The reverse helix system came from the Archimedes Screw Pump invented over 2,000 years ago by the mathematician Archimedes. Someone discovered that the pump brought up GOLD along with the water they were pumping out of the Nile river!
The Mountain Goat is very efficient because the spiral riffles inside of the tube turn and bring the heavy materials up to the high end of the tube while allowing the lighter materials to flow out of the back of the tube as tailings. This system makes the trommel self-cleaning, which eliminates the need to break down for clean-up as is necessary with sluice box type equipment.
Length: 32 inches
Width: 16 inches
Height: 24 inches
Weight: 18 pounds
Barrel: 4 inches
Power: 12-volt battery NOT INCLUDED
Pump: 750 GPH INCLUDED
Capacity: 2 yards per day
Water Requirement: 5 gallons
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