TRENS SN 71C/4000 MANUAL LATHE

Technical Description

The TRENS SN 71C/4000 is a heavy-duty manual universal center lathe designed for machining large workpieces with high stability and precision. It features a bed length between centers of 4000 mm (157.48 inches) and a maximum swing diameter over the bed of approximately 710 mm (27.95 inches), allowing for turning of sizable components. The lathe's spindle bore is 73.5 mm (2.89 inches), accommodating long bars and large-diameter stock material. Powered by a 7.5 kW (10.06 HP) motor, the spindle speed ranges from 10 to 1000 RPM, enabling a wide variety of cutting operations from roughing to finishing. The lathe offers a swing over the cross slide of about 420 mm (16.54 inches), and a gap width of 300 mm, supporting workpieces that require machining in the spindle gap area. The center height is 355 mm, providing ample clearance for large diameter turning. Its spindle nose conforms to DIN ISO 702 standards, with internal taper size 80 for tooling compatibility. The carriage features generous cross-slide and longitudinal feed travel, with rapid traverse rates of up to 3000 mm/min longitudinally and 1500 mm/min crosswise, facilitating efficient material removal and precision control. Additional features often include hardened and ground bed ways, the capability for inch-metric threading over wide pitch ranges, steady rests, and a tailstock with Morse taper #5 and spindle travel up to approximately 240 mm. The lathe's robust construction suits production, maintenance, and repair tasks involving large-diameter and long workpieces.