If the rocks slide off so will the gold bearing gravel, clay, etc. Second, more importantly, it is a fact that if the material is deposited on top of the grizzley (such as with other combos) then the grizzley has to be mounted at a very steep angle to allow rocks to slide off on their own in order to prevent the hopper from quickly loading up. This would decrease the dredge’s suction power considerably, make it less stable, and increase the rock jams encountered when dredging. First, depositing this material above the grizzley would require the dredge to lift the gravel much higher above the water level to process it. This is a much more efficient means of processing dredged material for two reasons. We have developed a unique system in which all dredged material enters the unit under the grizzley rather than above it. All Proline combos use a highly efficient power jet for producing dredge vacuum rather than the old-fashioned suction nozzle which is inherently less effective and more cumbersome to dredge with. As a result, it performs and looks totally different from anything else on the market. This system, unfortunately, doesn’t address the many tradeoffs encountered when trying to perform two functions with one unit.Įvery Proline combo was designed from the ground up to be both a dredge and a highbanker. Take a closer look at comparable machines on the market today and you’ll likely find a highbanker which, over the years, was retrofit with a “kit” to make it possible to dredge with. All of our combos are designed with one goal in mind: build a machine that can actually do both of its intended jobs well yet remain lightweight and simple in design. Proline Dredge/Highbanker combos have become the standard against which all other dual purpose machines are measured.
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