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 spiral riffles in the trommel tube are ¼ inch deep and spaced ¾ inch apart. We suggested your placer material be screened to ½ inch or less even though rocks as large as ¾ inch will pass through the tube. There is a nugget trap at the low end of the tube which should be checked regularly for nuggets larger than ¼ inch.
Mountain Goat Trommel Specifications
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Mountain Goat by Camel Mining Products
Mountain Goat Trommel Speeds Up Gold Processing!
Speed up your gold processing work and increase gold recovery with the Mountain Goat Trommel. This machine is aptly named because it can eat almost anything and is light enough to carry up a mountain!
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.
See The Mountain Goat in Action
The Mountain Goat Trommel is a small version of the reverse helix trommels used by major placer mining companies. Do not confuse it with the gravel pit trommels which are screen type classifiers, not archimedes mining trommels. It can easily be carried up a mountain by one person.
The Mountain Goat can be used in a tub to recirculate the water to operate the machine. That way, the water stays free of leaves, etc. that can plug the pump. A sock slipped over the pump will also keep the spray system from clogging up. Any large tray such as a mortar mixing tub (found at most home improvement stores) can be used with 5 gallons of water which is then recirculated by the 750 gallon per hour pump.
The Mountain Goat can also be used directly in a stream and is a very sturdy machine designed to take a lot of wear and tear!
The Mountain Goat Trommel controls are conveniently located at the top of the trommel for easy operation.
The Mountain Goat Trommel can be set up to feed directly into the Desert Fox Gold Panning Machine to make you a one-man mining operation.
Price: $695, plus S&H