... spherical plain bearing, always for a ball-and-socket joint; Most spherical plain bearing consists of a plain bearing and ball bushing inside ... made of plastic, nylon, PTFE...etc;3. Bearing Type1): Rod ends bearing(ball joint) including GE,GEG,GK,GF,GIHO...series2): ... Radial spherical plain bearing including PHS, POS, SI...T/ ...