Machining machine castings, also known as large castings, beds, bases, and worktables, feature: ⑴ Durable and good vibration-damping properties. ⑵ Excellent processability. Due to the high carbon content in gray cast iron, which is close to eutectic composition, the melting point is relatively low, the fluidity is good, the shrinkage rate is small, 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 chip formation during cutting.