Iseflex NBU 15 is primarily used for spindle bearings and highspeed plain bearings, e.g. in machine tools and textile machines. plain bearings, e.g. in machine tools and textile machines.plain bearings, e.g. in machine tools and textile machines.Further applications are in threaded spindles, ball operating under high loads, running gear bearings, as a long-term screws grease in cableway bearings and in precision engineering. It may also be used for the lubrication of tooth flanks in precision gears (e.g. bevel gears in milling machines, electromechanical valve actuators).