SUMMIT 20-4X60 MANUAL LATHES

Technical Description

The Summit 20-4X60 is a heavy-duty manual engine lathe designed for precision metal turning operations in industrial and job shop environments. This machine features a robust 100% cast iron construction with a swing capacity of 20.125 inches and 60 inches between centers, accommodating mid-sized workpieces. The lathe is powered by a 10-horsepower motor operating at 1,400 RPM, delivering consistent torque for demanding machining tasks. Its precision chrome alloy spindle incorporates a 4.125-inch bore diameter, enabling efficient through-spindle operations and accommodating standard tooling. The machine provides an 11.875-inch swing over the cross slide and extends to 27.625 inches over the gap bed, offering versatile workholding options. The 12-inch three-jaw chuck provides reliable workpiece clamping, while the integrated 6-position bed turret enables rapid tool changes and production efficiency. Spindle speeds range from 11.5 to 1,500 RPM with a quick-change gearbox supporting metric, module, and diametrical pitch threading capabilities. The longitudinal and cross feeds operate within ranges of 0.00145–0.44474 and 0.0007–0.22237 respectively, ensuring fine control over machining depth and feed rates. Additional equipment includes a steady rest and tailstock for extended workpiece support, alongside a 1/4-HP coolant pump for efficient chip evacuation and tool cooling. Weighing 7,200 pounds and measuring 12 feet long by 4 feet wide by 5 feet high, this machine delivers precision, durability, and reliability for complex turning operations.