How accurate can the overall cast height be held?
In most cases the height of the part is held within +/- 0.25″ (6.35 mm ). Parts are usually poured upside down, with the top of the mold open. This cast surface (the bottom of the part) is therefore very rough and not closely controlled. Where the overall part height is of concern, or all surfaces must be finished, a secondary operation (post casting or machining) can be performed. This will add to the cost of the part.
