Carbon Thrust Bearing are made form SS 410 Stainless steel & Impoerted carbon material with lapping finish. These thrust bearings are a complex and clever part of a reliable submersible motor. These thrust bearings will take a surprisingly  heavy down thrust load and provided that they have been installed correctly, rated correctly, and looked after property, they will provided many years of trouble free operation. The Hydrodynamic thrust bearing transmits the rotating thrust load to the frame of the motor, which is mechanically supported In the well. The down thrust load is transmitted through the bearing on a self-renewing film of lubricant, which is water in most motors.