| http://www.w3.org/ns/prov#value | - The inner race ring 4 which can be fixed to a rotatable shaft 8 (disclosed only in FIG. 1 of the drawings by some suitable means such as by press fitting), is provided along its outer face with a longitudinally extending, centrally apexed protuberance 9 contoured appropriately as one bearing seat for the spaced rows of spherical bearings 7 with the inner face of outer race ring 6 being contoured a
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