The SOUND SML 40 Manual Lathe is a heavy-duty engine lathe designed for machining large workpieces with precision. It features a 63-inch swing capacity, allowing it to accommodate sizable diameters around the spindle. The lathe’s centers extend up to 157.5 inches, supporting the turning of long components. A spindle bore diameter of 4.13 inches enables the passage of substantial stock through the spindle for internal machining or drilling operations. This combination of swing, center length, and spindle bore dimensions positions the SML 40 as suitable for heavy industrial tasks such as large valve bodies, pipe sections, and other oversized cylindrical parts. Its manual control setup offers direct operator manipulation, favored in applications requiring custom or low-volume production with flexible process control. The rugged construction and large work envelope are optimized for both repair and manufacturing environments needing robust turning capacity on tough materials. Overall, the SOUND SML 40 Manual Lathe is engineered to deliver reliable and accurate turning for large-scale industrial machining requirements with a maximum workpiece diameter swing of 63 inches and center length nearly 13 feet. The 4.13-inch spindle bore facilitates versatile internal machining, making this lathe an essential tool in heavy engineering shops and specialized fabrication operations.