rigidly disposed on shaft 90 axially adjacent to and in near contact with thrust surfaces 100 and 102 respectively disposed with axial clearance for lubrication thrust surfaces 100 and 102 both face inward and thrust collars 104 and 106 both face outward so as to prevent shaft 90 from movement in either axial direction beyond a predetermined safe amount to avoid torsional strain from the second non electrically conductive bearing 94 and to provide for additional support for impeller 78 non electrically conductive wearing rings 108 may be inserted between impeller 78 and housing 60 wearing rings 108 may be made from the same materials used for the non metallic or non electrically conductive bearings 92 and 94 during operation of pump 50 rotation of impeller 78 moves the fluid to be pumped from the suction side 82 corresponding to inlet 52 in fig1 of impeller chamber 80 to the pressure side 84 of impeller chamber 80 the outlet of pump 50 corresponding to outlet 54 of fig1 would be located along a portion of the pressure side 84 of chamber 80 which is not shown in the cross sectional view of fig2 since the fluid orifices 86 pass through housing 60 to enter the pressure side 84 of impeller chamber 80 there will be a small bleed off of oil into the motor chamber 70 this oil circulates in the motor chamber 70 cooling motor portion 62.