Patent ID: 8899838
Filing Date: 2014-12-02
Classification: F16C

Abstract:
1. A cage for a ball bearing unit, the cage comprising: a plurality of pockets each delimited by a respective spherical surface having a centre (C) lying in a radial mid-plane (P) of the bearing, two half-cages substantially symmetrical about the mid-plane (P), and connected to one another, each half-cage having an annular body and a plurality of partially hemispherical cavities axially facing the hemispherical cavities of the opposite half-cage so as to define therewith the pockets; mutual connecting means associated with each cage for connecting together the two half-cages; and wherein for each half-cage, two substantially concentric and circumferentially continuous radial ridges extending radially in opposite directions from each annular body, of which the first ridge extends in a radially outward direction for sealingly engaging a groove formed in the outer ring of the bearing unit, and the second ridge extends in a radially inward direction for sealingly engaging a groove formed in the inner ring of the bearing unit.