Friction and wear characteristics of journal bearing materials in gasoline

Tribological elements have low lubricating characteristics in gasoline beca use of its low viscosity. The demand for materials that have low friction c oefficient and high durability even in a special environment such as gasoli ne has risen in recent years. In response to this demand, we tested several journal bearings of various materials in a gasoline environment in order t o determine their friction and wear characteristics. It was thus found that (1) a Cu-Sn-Pb alloy bearing has the lowest wear rate; (2) a Cu-based sint ered metal bearing has almost the same wear rate as that of the Cu-Sn-Pb al loy bearing; and (3) a porous metal bearing with PTFE-Pb filler has the low est friction coefficient but its wear is relatively large.