... price 4.Prompt delivery time 5.long life Backing BearingsThe Sankai Ganghai Co., Ltd. NNCF series of backing bearings of was ... . The structures of the NNCF series of backing bearings in Sankai Ganghai Co., Ltd. are shown as follows: Tolerance and MaterialsThe ... of10M/S, and rolled sheets as thin as 0.005mm. Sankai Ganghai Bearing Manufacture Co., Ltd was the first, and now ...