CAGE FOR BALL BEARING

摘要

PURPOSE: A ball cage is provided to prevent the separation of a ball bearing while reducing the manufacturing costs and the period for a mold. CONSTITUTION: A ball cage(100) comprises an outer cage(1), an inner cage(2), and a ball bearing. A plurality of outer holes(11) is formed in the circumferential portion of the outer cage. The inner cage is separated from the outer cage. The inner cage comprises a plurality of inner holes(21) fitting to the outer holes. The outer holes and the inner holes are punched in the contact portion with the ball bearing. The outer holes are punched to the radial direction of the outer cage. The inner holes are punched to the radial direction of the inner cage. The ball bearing is installed to prevent the separation between the outer holes and the inner holes.