SUMMIT 28-4x80 MANUAL LATHE

Technical Description

The Summit 28-4x80 is a precision manual engine lathe engineered for general machining and production work. Featuring a 28-inch swing over bed and 80-inch distance between centers, this machine accommodates substantial workpieces with maximum versatility. The lathe incorporates a 4.13-inch spindle bore and 19.6-inch swing over cross slide, enabling diverse turning and boring operations. Powered by a 15-horsepower motor, the machine operates at speeds up to 1,250 RPM across 21 stepped ranges, facilitating optimal surface finishes across various materials. Constructed entirely from cast iron with heavy cross-ribbing, the lathe delivers exceptional rigidity and vibration dampening critical for precision work. The hardened and precision ground bedways ensure long-term accuracy retention, while anti-friction mounted shafts and dynamically balanced components maximize performance. The machine features a quick-change gearbox capable of cutting 64 American inch threads (1/4–60 TPI), 64 metric threads (0.5–120), and speciality threads including module and diametrical pitch formats. Standard equipment includes a 3-jaw chuck, thread dial, steady rests (standard and extra capacity), follow rest, taper attachment, coolant system, carriage stop, and full-length splash guard. The rapid traverse carriage with 4-way joystick control and two-speed tailstock enhance operational efficiency. Measuring 154 inches long by 48 inches wide by 67 inches high and weighing 8,300 pounds, this machine combines capability with space efficiency for well-equipped machine shops and production facilities.