HOW TO AVOID PROBLEMS IN MACHINING IRON CASTINGS

Previously unpublished information is presented on the design, production and machining of iron castings. AISI B1112 cold rolled or cold drawn steel at a hardness of 160 BHN is used as the standard for the speed at which materials can be machined. A table gives the more frequently encountered Carboloy® cemented carbide grades recommended for cast iron applications. Grey cast iron, white cast iron, and malleable and nodular iron characteristics are presented with suggestions for machining each. Recommendations and precautions are given in the areas of design, machining techniques, and tool geometry.