SAN SHING SP-3690 MANUAL LATHE

Technical Description

The SAN SHING SP-3690 is a heavy-duty precision engine lathe designed for industrial metal turning operations. This machine features a 36-inch swing capacity with a 90-inch distance between centers, enabling the processing of large workpieces with extended lengths. The spindle incorporates a 4-inch bore, accommodating various tooling configurations and allowing for through-spindle operations. Powered by a 15-horsepower motor, the SP-3690 delivers robust cutting performance with a maximum spindle speed of 1,000 RPM, making it suitable for heavy-duty roughing and finishing operations. The swing over the cross slide measures 27.5 inches, providing adequate clearance for workpiece diameters while maintaining precise control over material removal rates. The lathe bed is constructed from high-strength cast iron FC-25 with a box structure design, delivering the rigidity necessary for sustained heavy cutting without deflection. The machine incorporates longitudinal and cross feeds with multiple speed ranges, enabling operators to optimize cutting parameters for different material types and surface finish requirements. The SP-3690 features precision spindle nose configurations with options for A2 and D1 spindle noses, MT.No.5 and MT.No.6 taper centers, and rapid traverse capabilities on both Z and X axes. Cross slide travel of approximately 18.5-20.5 inches provides adequate tool positioning flexibility. This manual-controlled lathe is engineered for production environments requiring high precision, repeatability, and extended service life in demanding manufacturing applications.