Abstract: A system and device for pumping molten metal that reduces bearing member fractures comprises a pump having a pump chamber including a first bearing surface, a rotor having a second bearing surface that aligns with the first bearing surface. The second bearing surface is formed by a plurality of spaced bearing pins attached to the rotor. Each bearing pin has an outer surface preferably substantially flush with the outer perimeter of the rotor. The pins are comprised of a heat resistent material that is harder than the material comprising the rotor.

Abstract: A molten metal pumping device is disclosed that comprises a pump base including at least one input port, a pump chamber, and a discharge leading to an output port. A rotor is retained within the chamber and is connected to a rotor shaft. The device further includes a superstructure attached to and positioned above the pump housing, a motor on the superstructure, a drive shaft connected to the motor and a coupling connecting the drive shaft to the rotor shaft. The rotor extends beyond the input port to deflect solid particles thereby reducing jams and preferably is a dual-flow rotor, directing molten metal both into the chamber and out through the discharge. The coupling is flexible and has two coupling members with a flexible disc disposed therebetween. Another aspect of the invention is a housing for a transfer pump that includes a discharge leading to an output port and a button adaptor extending from the discharge.