SF-2 Marginal Pb-free  self-lubricating bearing  is used  steel-backing as  its 

structure, sintered porous bronze as  its  interlayer, surface  inlaid  the modified

POM. Suitable for marginally  lubricated and dry operation on the conditions of

lubrication indents grease. It has been widely applied to metallurgical machinery,

Mine machinery, water conservancy machinery, vapor  locomotive, building 

machinery, agriculture machinery, steel rolling industry etc.