Each of the fly weights has an inclined rear face which cooperates with a conical surface of the nut so that when centrifugal action during operation of the engine causes the fly weights to move radially outwards they are simultaneously forced axially forwards to exert a thrust on the outer ring which thus tends to restrain {HEAD ~ the bearing} through {TAIL ~ the action} of the cooperating conical surfaces of the outer ring and the first shaft, thereby controlling bearing play 
Each of the fly weights has an inclined rear face which cooperates with a conical surface of the nut so that when centrifugal action during operation of the engine causes the fly weights to move radially outwards they are simultaneously forced axially forwards to exert a thrust on the outer ring which thus tends to restrain { HEAD ~ the bearing } through { TAIL ~ the action } of the cooperating conical surfaces of the outer ring and the first shaft , thereby controlling bearing play
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