A main body of a bearing (12) is guided on a guide rail (10) by at least one rolling-element circuit (14, 16) and receives at one end an end plate (13). A deflection duct (50, 52) is recessed in the end plate and receives a deflection piece (60), which crosses the deflection duct (50, 52). A lubricant-supply system (86) for the rolling-element circuit (14, 16) is provided inside the end plate (13). The lubricant-supply system (86) is partly within a deflection-piece receiver duct (58) which accommodates the deflection piece (60). The lubricant-supply system (86) includes a lubricant channel (92) which runs entirely within the end plate (13) so that it is encapsulated completely by the material of the end plate (13).