The 2011 Okuma Multus B400-W is a heavy-duty multitasking CNC lathe equipped to handle complex, large-diameter workpieces with seamless efficiency. With an 18-inch chuck and 4-inch bar capacity, it accommodates turning diameters up to 26.37 inches and features a full C-axis (0.001° resolution) as well as a powerful, servo-driven B-axis capable of 225 degrees of swing and indexing down to 0.001°, ensuring fine angular precision for multi-face machining. The primary spindle is driven by a 30 horsepower motor (with 20 HP continuous) and a 4.33-inch bore, while the sub-spindle—equally capable with a 22/15 HP drive—allows for synchronous operations and backworking at speeds up to 3,800 RPM.
Its Y-axis travels ±4.53 inches, complemented by a massive 60.83-inch Z-axis and 61.02-inch W-axis sub-spindle stroke, making it exceptionally competent for elongated components. The machine's milling capabilities are equally formidable, with a 19/13 horsepower live tooling spindle operating at 6,000 RPM, allowing heavy-duty cutting on complex profiles. Tooling is handled through an 80-position automatic tool changer, supporting tools up to 15.75 inches in length and weighing up to 22 pounds.
Additional features include through-spindle coolant (TSC), an advanced Okuma OSP-200L CNC control, chip conveyor, tool setter, and tailstock for enhanced versatility. Rapid traverse speeds of 1,574 IPM in X, 1,024 IPM in Z, 787 IPM in Y, and sub-spindle W-axis make for blisteringly efficient cycle times. At a substantial 34,000 pounds, the Multus B400-W is a true production-class multitasker, designed to reduce setups, increase throughput, and tackle the most demanding aerospace, oil & gas, and automotive components—all within a 226.4" x 104.7" footprint.