The essential feature of centrifugal casting

The essential feature of centrifugal casting is the  introduction  of molten metal into a mold which is rotated  during  solidification of the casting. The centrifugal force  is  relied upon for shaping and feeding the molten metal  with  the utmost of detail as the liquid metal is thrown by  the  force of gravi‐ty into the designed crevices and detail  of  the mold.

The concept of centrifugal casting is by no means a  modern  process. This technique which lends clarity to  detail  was used by Benvenuto Cellini and others in the  founding  arts during the 16th century. The mention of  actual  centrifugal casting machines is first recorded when  a  British inventor, A.G. Eckhardt, was issued a patent in  the  year 1807. His method utilized the placing of the  molds  in an upright position on pivots or revolving bases  (sometimes  referred to today as a "vertical" centrifugal  casting  machine). In 1857 a U.S. patent described wheel  molds  which presumably were used for the centrifugal  casting  of railroad car wheels.