Okuma MULTUS U3000 5-Axis Mill-Turn

The Okuma MULTUS U3000 is a horizontal multi-tasking machine built around an 8-inch chuck: a turning spindle, a tilting milling spindle and a lower saddle, with the part finished in one cycle rather than routed between a lathe and a machining centre.

Maximum machining diameter is 650 mm (25.59 in), while maximum work length is 1,000 mm or 1,500 mm (39.37 or 59.06 in) depending on bed. The combination of a generous swing with a relatively short bed defines the machine's territory — chucked work, short shafts, housings and flanges rather than long between-centres components.

The spindle runs from 50 to 5,000 min⁻¹ on a JIS A2-6 nose, with an A2-8 nose optional, driven by a 22/15 kW (30/20 hp) motor rated at 30 minutes and continuous. Five thousand min⁻¹ on an 8-inch chuck suits small-to-medium diameters in steel, stainless and aluminium where surface speed rather than torque limits the cut. The 15 kW continuous figure is the one to plan sustained production against; the 22 kW rating covers roughing.

Rapid traverse is quoted per saddle: 50 m/min (1,968 ipm) on Xa and Za, 40 m/min (1,574 ipm) on Zb and Y, and 25 m/min (980 ipm) on Xb. The upper milling head and the lower saddle move independently, which is what allows two tools to cut at the same time on parts that suit it.

Tool capacity is 40 tools — enough that a complete program covering turning, drilling, tapping and milling on both ends of a part can stay loaded. The machine is offered in W, 2S and 2SW configurations, adding a second spindle, a second saddle, or both, which is how the platform scales from operator-loaded work to genuinely unattended production.

Footprint is 4,925 × 2,995 × 2,955 mm (193.90 × 117.91 × 116.34 in) for the 1,000 mm bed and 5,425 mm long for the 1,500 mm version. It fits precision job shops and medium-volume production where parts are small enough to cycle quickly but complex enough that a second setup would cost real accuracy.