Production of carbon steel deep groove ball bearings. 1.Materials:Carbon and Chrome 2.Low-noise, high-speed 3.Packing: plasti deep groove ball bearing1. with OPEN,Z,ZZ,RS,2RS,N,NR products2. wide varieties,inner packing:plastic bag,tube in carton3. material:Chrome steel and carbon steel4. less coefficient of friction, high limiting speed,high precision,5.robust in operation and normally require ...