BRONZE BUSHING JDB650 USD IN MINING MACHINERY WZB WZB-7 Graphite-impregnated bronze solid lubrication bearings are customer-specified products. Its base is CuSn10Zn2 material. Compared with JDB-6, it has higher surface hardness but also higher coefficient of friction. After graphite impregnation, it can be used without oil lubrication. Compared with regular bronze bearings, it has better corrosion-resistance property.WZB-7 is primarily used in low load, high temperature, and moderate speed applications. No. 12, Hongwei North Road, Ganyao town, Jiashan County, Jiaxing, Zhejiang, China. +86 151 57316471 jayson@jswzbearing.com