In rolling mills, brush is necessary for metal surface treatment, such as cleaning, washing, polishing and deburring.3 main factors that affect brush selection for rolling mills are filament material, brush construction and working condition.1, Filament Material Nylon FilamentHard nylon is for strong cleaning. On the contrary, soft nylon is needed during fine cleaning. Advantage for nylon filament is acid-resistant and heat-resistant Abrasive FilamentAbrasive filament is nylon(PA6, PA612) mixed with abrasive materials. Diameter is from 0.46 to 1.78mm, and grit sizes are from 60# to 1000#. Grit size is higher, polishing performance is finer. 2, Brush Construction Brush Outer DiameterOuter diameter is bigger, workload can be heavier. This size can be adjusted to your machine size and rotating speed. Filament Working LengthThis parameter  depend on brush life time and machine size Adding FilamentThere are two ways. One is cassette type, the other is spiral type. Brush is called as cassette roller brush and spiral roller brush 3, Working Condition Rotating Speed(rpm)When setting rotating speed, it is necessary to give a full play to cleaning permance and polishing performance Pressure(A) Spray On BrushWhen brush is contacted with metal surface, the temperature is keeping rising. Spray bring temperature reduction. Spray in right direction remove dirt and increase cleaning performance. No spray will largely reduce service life of brush for rolling mills