Abstract: The invention relates to a method of manufacturing a roller bearing comprising a cage made from a thermoplastic polymer-containing material. By cross-linking the polymeric material its properties, such as form retention and compatibility with lubricants, are improved. A roller bearing provided with a cage made from suitably cross-linked thermoplastic polymer-containing material can be used even at temperatures above the melting point of the polymer. According to the invention a roller bearing is manufactured by forming a cage from thermoplastic polymer-containing material, providing it with rotating bodies and only then cross-linking the material. This avoids damage to an otherwise already rigid cage during the insertion of the rotating bodies.

Abstract: A bearing unit for a vehicle wheel comprises a three-point or four-point bearing with an inner and an outer race, each with a bearing groove containing a series of rolling elements, which inner race has means for fixing to the suspension construction for the wheel. At least the outer race has a radially inward pointing bearing flange, which outer race bearing flange is provided with means for fixing a wheel thereto. The bearing unit can also be used for a driven front wheel comprising a constant-velocity joint, in which the outer ring of the joint has an external diameter which is at most equal to the internal diameter of the outer race, and is smaller than the internal diameter of the inner race. Because the joint is situated in the bearing, the bearing unit is compact.