... 2. low friction moment 3. delivery quick 4. OEM service Ball bearing:1. Main brand : Sweden: SKF . American : TIMKEN ... NTN,THK,IKO,NACHI2. Main types : deep groove ball bearing , self-aligning ball bearings, cylindrical rollerbearings, spherical roller bearing , tapered ... bearing , inserted bearing with housing3. Bearing name :Deep groove ball bearing5. Number of row :Single row or double row6. Material ...