Shaft Alignment Illustration. Notes on the drawing: Measure gap between mating faces of coupling flanges. Maximum allowable gap at any point is .003 when any point of coupling faces are in contact. Take this measurement several times, rotating shaft 1/4 turn each time. This measurement must be made with coupling bolts removed. Other labels: drive flange in contact; coupling key and keyway; propeller shaft; motor mount; feeler gauge; safety wire through bolt heads.
