Abstract: Ball cage for homokinetic joints, formed from a blank that is configured as a substantially annular spherical segment, the ball cage includes: window-type ball pockets located along an equator with substantially equator-parallel bearing surfaces that interact with joint balls, with substantially annular functional zones that are designed at least on outer ring edge areas and that interact with a joint bell, and with substantially annular functional areas that are designed on inner ring areas and interact with the joint spider, wherein on the blank at least some of the functional zones are elevated compared to the neighboring areas of the ball cage.

Abstract: A procedure to machine openings in work pieces which provides two cutting blades (11, 12), defining a cutting blade axis, adjacent to a work piece in which an opening is to be machined, the opening defining a distance between two oppositely positioned opening edges and defining an opening axis. The opening axis and the cutting blade axis are inclined at an acute angle (&agr;) to one another in a way that the distance between the cutting blades parallel to the opening axis (9) is equal to the required distance between the opening edges. With the increasing wear of the cutting blades, the inclination angle is reduced so that the cutting blade distance parallel to the opening axis continues to correspond to the required distance of the opening edges.

Abstract: A procedure to machine openings in work pieces proposes to position two cutting blades (11, 12) of a cutting tool (2) with an axis of rotation (15) alongside a cutting blade axis at a distance to one another, which is greater than the required distance between two oppositely positioned opening edges to be machined (6, 7) alongside an opening axis (9), which runs through these opening edges. The opening axis and the cutting blade axis are inclined at an acute angle (&agr;) to one another in a way that the distance of the cutting blades to the opening axis (9) is equal to the required distance between the opening edges. With the increasing wear of the cutting blades the inclination angle is reduced so that the cutting blade distance parallel to the opening axis continues to correspond to the required distance of the opening edges.