GRAPHALLOY bearings can be pressed in with much greater press fits than hard carbon materials; how does this help?
A. Generally, the harder the carbon material, the lower its elastic modulus. GRAPHALLOY has a higher elastic modulus and tolerates greater press fits. This same property means that GRAPHALLOY withstands the shock of shop handling, pump installation and most importantly, pump operation. The hard carbon bushing, that chips easily when dropped, is at a disadvantage when encountering similar shocks in use. Since hard carbon materials cannot tolerate heavy fits, they are difficult or impossible to use for high temperature applications as they would become loose in their housing bore.
