... steel or bronze bearing with grease, UHMW-PE friction parts need no lubricant,maintain easily,operate smoothly,have least ... to oponent,is a superb material for use wear parts in machinery and equipment.5. Noise and vibration ... commonly used as gears,sprokets,rollers, mixer paddles, pump impeller,bearing,chain and belt guides,wear strips etc. ... the life of screw and transportation belt. UHMWPE Pump parts