Primary Sedimentation Tank Bearings Industry: End User: Application: Thordon Grade: Date of Original Installation: Sewage and Wastewater Watercare Mangere, New Zealand Peak Cap Bearing in Primary Sedimentation Tanks SXL 2010 Challenge In 2010, a trial was run at Water Care Mangere where Thordon SXL bearings replaced greased white metal (Babbitt) bearings in the Primary Sedimentation Tanks. The shafts are made of mild steel and they run 24/7 at a very slow speed. One of the issues with the greased Babbitt bearings is the grease lines as they can be subject to damage from sticks, rags or trash moving through the tank. If the grease doesnt get to the bearings for any reason, then the bearings will gall, pick up or seize. Dewatering a tank in order to replace the bearings costs a lot of

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