The SHANDONG SANZHENG C630—1BG/8000 is a heavy-duty horizontal manual lathe engineered for precision metal cutting operations on large workpieces. With a maximum swing diameter of 31.5 inches over the bed, this machine accommodates substantial cylindrical components. The impressive 315-inch distance between centers enables machining of extended workpieces, making it ideal for processing long shafts, pipes, and similar industrial components. Powered by a 14.75 HP motor, the lathe delivers sufficient torque for demanding cutting operations across various materials. The spindle operates at a controlled 820 RPM, optimized for stable, precision work on larger diameter stock. The machine features a 70mm spindle bore and utilizes standard three and four-jaw chucks for secure workpiece holding. This model incorporates a quenched and hardened bed (HRC52) for dimensional stability and accuracy. The C630—1BG configuration includes a guideway width of 550mm, maximum swing in gap of 800mm, and 300mm available length in gap, providing operational flexibility. Threading capabilities span metric, inch, and pitch thread ranges, with processing accuracy rated at IT7 and workpiece surface roughness of Ra1.6. The lathe is manufactured by Shandong Sanzheng Machine Tool Co., Ltd., an ISO 9001 certified producer with over 20 years of experience. Designed as a semi-automatic precision lathe, it combines manual operation with reliable engineering suitable for job shops, manufacturing facilities, and heavy-duty production environments requiring consistent accuracy and durability on large-scale machining projects.