MONARCH 91 MANUAL LATHE

Technical Description

The MONARCH 91 Manual Lathe is a heavy-duty, precision-engineered machine designed for large-scale turning operations. It features a substantial swing capacity of 48 inches and a center distance of 132 inches, accommodating workpieces of significant size. The lathe is equipped with a 36-inch 4-jaw chuck with 2-piece top jaws and a spindle bore diameter of 4-1/16 inches, allowing versatile workholding and material throughput. Spindle speeds offer 36 selections, ranging from 6 to 750 RPM, providing flexibility for various machining requirements. The feed system offers 48 selections from 0.0035 to 0.196 inches per revolution, while threading capabilities include 48 thread selections from 1-1/2 to 28 TPI, supporting a wide range of thread cutting tasks. The lathe’s taper attachment and camlock-type D1-11 spindle interface enhance its adaptability for specialized machining processes. The tailstock features a 7-inch quill diameter with a Morse Taper 6 (MT6), enabling robust tool support. For operational efficiency, the lathe incorporates a coolant system and a 3-pin roller steady rest with an approximately 11-inch maximum opening, essential for stabilizing long workpieces. The machine is powered by a 50 HP main motor and a 5 HP hydraulic pump, running on 440V three-phase electricity, ensuring adequate power and hydraulic control. It weighs 37,195 pounds and measures 84 inches wide, 274 inches long, and 84 inches high, reflecting its industrial-scale design for heavy machining applications. This lathe is suited for high-precision manual turning in demanding environments requiring large work capacity and extensive range of speeds and feeds.