Two-piece ball cage for bearing assembly

A ball cage including in combination a pair of cage portions having opposing generally semicylindrical recesses defining circumferentially spaced radial bores for receiving balls and having means defining mating surface portions extending between said bores, said bores having their axes in a plane, the mating surface portions of one of said cage portions being formed with means defining radially outwardly projecting circumferentially extending lip sections, the mating surface portions of the other of said cage portions being formed with radially inwardly projecting circumferential lip sections adapted to interlock with said outwardly projecting lip sections to prevent axial separation of said cage portions while permitting relative rotational movement thereof, said lip sections projecting predetermined distances beyond said plane from opposite sides thereof, said distances each being less than the radius of said bores and being such as to permit balls substantially of the diameter of said bores to be inserted axially into the recesses of one of said cage portions and to permit the other of said cage portions then to be mated with said one cage portion with said balls in said bores.