Machining machine castings, also known as large castings, bed frames, bases, and worktables, feature: ⑴ Good wear resistance and vibration damping. ⑵ Excellent process performance. Due to the high carbon content in gray cast iron, which is close to eutectic composition, the melting point is relatively low, with good fluidity, low shrinkage rate, making it suitable for casting complex structures or thin-walled castings. Additionally, the cast iron's machinability is superior to steel, as the graphite facilitates the formation of chip breakage during cutting.