Which of the following lathes is most suitable for general cylindrical machining?

The engine lathe is most suitable for general cylindrical machining due to its versatility and wide range of capabilities. Engine lathes are capable of performing various operations such as turning, boring, drilling, and facing. They can accommodate different workpiece sizes and shapes, making them ideal for producing cylindrical parts. Their design allows for easy adjustments to speed and feed rates, providing the operator with control over the cutting process.

In contrast, while turret and capstan lathes are also used for machining, they are generally better suited for high-volume production of small, identical parts rather than general-purpose machining. CNC lathes offer advanced automation and precision but may not be necessary for all types of cylindrical machining, particularly for simpler projects where manual control from an engine lathe suffices. Therefore, the engine lathe stands out for its broad applicability in general cylindrical machining tasks.