The MAMMOTH PROKING PB-70 is a heavy-duty horizontal machining center designed for large-scale turning and machining operations. This machine accommodates workpieces with a maximum turning diameter of 57.38 inches and an impressive maximum turning length of 800 inches, making it ideal for extended cylindrical components. The spindle features a 58-inch chuck diameter and a maximum swing of 70.5 inches, enabling versatile part positioning and accessibility. The main spindle operates at 630 RPM with 30 HP in standard configuration, with an optional upgrade to 500 RPM at 50 HP for heavy-duty, high-torque applications requiring greater cutting force. The machine's two-axis configuration provides precise control over part positioning and tool movement. Its slide-type primary tool carrier enables efficient tool indexing and sequential operations. The Z-axis travel measures 60 inches in standard specification, with an optional 800-inch extension for extended axial movement on longer workpieces. With a single main spindle capable of simultaneous cutting, this machine excels in production environments requiring rigid, powerful turning capabilities for large industrial components such as shafts, cylinders, and heavy-duty machinery parts. The combination of substantial swing capacity, extended part length accommodation, and flexible spindle speed options positions the PB-70 as a versatile solution for demanding large-scale machining operations in industrial manufacturing settings.