Metallized Carbon Corp.’s Metcar carbon-graphite bushings offer advantages over traditional metals for use in gear pumps that pump aviation fuel for aircraft engines. The carbon-graphite bushings are used to support both the drive gear shaft and the idler gear shaft. The bushings are preferred for this application because they can use aviation fuel as the bushing lubricant. The bushings are self-lubricating—they can run dry for short periods of time without catastrophic pump failure or significant wear. In addition, they are dimensionally stable, which permits close bushing-to-shaft running clearances. Finally, they have a relatively low elastic modulus, exhibiting nearly the same coefficient of thermal expansion as the metallic gear pump housing material, assuring consistent running clearance between shafts and bushings.