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adhesive wear adhesive wear occurs when two metals rub together with sufficient force to cause the removal of material from the less wear resistant surface. if the two metals have a comparable chemical analysis and hardness, a galling action can occur where one metal is actually welded to the other causing high and low spots where material is added or removed. the screw and barrel can come into contact with each other during operation. the screw is cantilevered in the barrel and is supported only at its shank and by the plastic in the barrel. when conditions cause excessive contact between the two components, adhesive wear and/or galling will occur on the screw flight od and the barrel wall. there are several causes of adhesive wear and galling, all of which can be prevented through the proper design, manufacture and use of the machinery components.
kejuruteraan mekanik