Bushing provides an interface between two parts, often reducing friction or wear, whereas coupling connects two shafts for power transmission.
Senior Home Editor Roy Berendsohn has worked for more than 25 years at Popular Mechanics, where he has written on carpentry, masonry, painting, plumbing, electrical, woodworking, blacksmithing, welding, lawn care, chainsaw use, and outdoor power equipment. When he’s not working on his own ...