Why does the Marlin dredge employ (in their ladder pump drive system) the torque tube instead of the line shaft with cutlass bearings?
The torque tubes, although more expensive, require less horsepower because of the use of antifriction bearings as opposed to the cutlass bearings that are basically rubber sleeve type bearings or “friction bearings”. Cutlass bearings have to be flushed with clean water, which not only requires horsepower to drive the water pump, but also is impossible to obtain in some dredging environments.
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