A Lister domestic water pump crankshaft assembly.

Lister P/N 187-00011

Cast and machined in the UK from Spheroidal Graphite Cast Iron 600/3, also known as Ductile Cast Iron. This is a type of cast iron that has been treated while molten with Magnesium or Cerium to induce the formation of free Graphite as nodules or spherulites. The rounded shape of the nodules creates less stress points than the flat graphite flakes found in grey Iron, this inhibits the creation of cracks and provides enhanced ductility. This nodular graphite structure inhibits the creation of linear cracks hence the ability to withstand distortion. In addition, Ductile Iron provides a unique combination of strength, wear resistance, fatigue resistance, and toughness.