Precessional slip in an angular contact ball bearing

A previously reported ball precessional motion in an angular contact bearing is analyzed. Explicit forms for ball-race slip are given, both with and without precession. Slip and entrainment velocity at ball-ball contacts in a retainerless bearing are also given, also with and without precession. It is shown that the observed precession does not change the hertzian slip fields very much at either contact, compared with those produced by pure spin.