... noise and long life 2.ISO 9001:2000 quality 3.low noise ,high quality,fast delievery Roller Bearing :CYLINDRICAL ROLLER BEARINGSeries: ... used in metallurgy, mining, printing machines, rolling machines, welding arm and positioner, etcService policy:Quality assurance, timely shipment and ... process:Our complete production process makes sure the quality of the products can meet customer’s requirement ...