How precise can parts be cast?
Part flatness, hole location, hole diameter and feature measurement are all measures of precision. The precision of the cast part is determined by mold design, mold construction and process variables. Using a properly designed, high quality steel mold, parts can be cast with a flatness of 0.0025 in/ft (0.006 cm/m), and hole diameters of 0.001 in/ft (0.003 cm/m). When closer tolerances are required, or a low cost mold is to be used, tolerances can be achieved using secondary machining, lapping, grinding or grouting processes. Casting to tolerance is highly desirable as it eliminates expensive secondary operations. By eliminating secondary operations, the delivery time is expedited, reducing work-in-process inventory and allowing quicker response to customer delivery requirements. Deliveries can be days, instead of months as is typical for metallic components.
