6203-2Z Deep Groove Ball Bearing 17x40x12mm Anti-Dust Smooth Running For Household Appliances Textile Machinery Product Overview 6203-2Z is a popular general-purpose single row deep groove ball bearing equipped with double-sided metal dust shields, standard dimension 17×40×12 mm. It is precision-made from wear-resistant GCr15 bearing steel and matched with stamped steel cage to ensure stable rolling performance. The 2Z metal shield structure prevents dust and tiny impurities