Submersible Motors our Products Submersible Motors Altimate submersible borehole pumps and motors, designed for pumping groundwater. The pumps are suitable for boreholes in sizes ranging from 4″ over 6″ and 8″ to 10″. The motor sizes for the pumps are available in 0.37-110 kW. 4” Oil Cooled Motors 4" Water Cooled Motors 6" Water Cooled Motors 8" Water Cooled Motors 10" Water Cooled Motors