SF-1B Bronze Pb-free self-lubricating bearing used bronze alloy as base with 

special formulation, sintered porous bronze as  its  interlayer and the Compound 

of PTFE and  lipophilicity fiber as  its surface.  It offers the property of good self-

lubricating, low wear , low friction, corrosion resistence. It has been widely applied 

to metallurgy steel machinery, joined casting machinery, cement grout pump and 

spiral conveyer machinery etc.