Okuma MULTUS U3000 5-Axis Mill-Turn
Key Specifications
Max Turning Diameter
Max Turning Length
Bar Capacity
Main Spindle Speed
Main Spindle Motor
Milling Spindle Speed
Overview
The Okuma MULTUS U3000 is a 5-axis multi-tasking mill-turn machining center that combines the turning capability of a high-performance CNC lathe with full 5-axis milling in a single machine. The U-series designation indicates the integration of a B-axis milling head that can tilt +/- 120 degrees, enabling complete machining of complex components from any angle without refixturing. This makes the MULTUS U3000 one of the most capable single-setup machining platforms in its class.n
The machine features a main spindle with 4,000 RPM and 37 kW of power for aggressive turning operations, combined with a 12,000 RPM milling spindle on the B-axis unit for 5-axis simultaneous milling, drilling, and tapping. A lower turret provides additional turning capability and allows simultaneous cutting operations for shorter cycle times. Bar capacity reaches 102 mm (4 in) and the maximum turning diameter is 660 mm, accommodating a broad range of shaft, disk, and prismatic components.n
All MULTUS machines run on the Okuma OSP-P300MA multi-tasking control, which manages simultaneous multi-axis interpolation, collision avoidance across all machine elements, and the MULTUS U-specific B-axis programming cycles. The control Turn-Cut feature enables helical milling of bores and outer diameters that exceed the milling spindle reach by rotating the B-axis in coordination with the C-axis.n
The MULTUS U3000 is a production machine for aerospace, oil and gas, and defense components where the cost of multi-operation setups, fixture transfer, and datum errors cannot be tolerated. In these environments, the premium price is justified by the reduction in work-in-process inventory, setup labor, and inspection costs that complete machining enables.
Full Specifications
| Parameter | Value |
|---|---|
| Max Turning Diameter | 660 mm (26 in) |
| Max Turning Length | 1,500 mm (59.1 in) |
| Bar Capacity | 102 mm (4 in) |
| Main Spindle Speed | 4,000 RPM |
| Main Spindle Motor | 37 kW (49.6 HP) |
| Milling Spindle Speed | 12,000 RPM |
| Milling Spindle Motor | 18.5 kW (24.8 HP) |
| B-Axis Tilt Range | +30 / -120 degrees |
| Lower Turret Stations | 12-station (live tooling capable) |
| Rapid Traverse (X/Z) | 20 / 20 m/min |
| Control | Okuma OSP-P300MA |
| Machine Weight | approx. 22,000 kg (48,500 lb) |
| Okuma Global Repair Center | Charlotte, North Carolina |
Specifications sourced from okuma.com — verified 2026-03-28
Strengths & Limitations
Strengths
- B-axis milling head with +30/-120 degree tilt enables full 5-axis simultaneous machining and complete part production in a single setup
- Dedicated milling spindle at 12,000 RPM and 18.5 kW provides genuine machining center performance for milling operations, not just live tooling
- Okuma Turn-Cut function enables milling of features beyond the geometric reach of standard interpolation methods
- OSP-P300MA control with collision avoidance manages the complexity of multi-axis simultaneous motion safely
- Elimination of multi-operation setups reduces WIP inventory, fixture costs, and datum transfer errors for complex aerospace and defense parts
Limitations
- Very high capital cost puts the MULTUS U3000 out of reach for smaller job shops without specific complex-part production needs
- Programming complexity for full 5-axis mill-turn operations requires experienced CAM programmers and long setup times
- OSP control, while powerful, has a steeper learning curve for operators and programmers not familiar with the Okuma ecosystem
Best For
Frequently Asked Questions
01
The B-axis is the tilting milling head that holds the milling spindle. It can rotate from +30 to -120 degrees, allowing the milling spindle to address the workpiece from virtually any angle. This enables true 5-axis simultaneous milling, angled hole drilling, and complex surface machining without repositioning the workpiece.
02
The MULTUS B300 is a mid-range multi-tasking lathe with live tooling and Y-axis but no dedicated B-axis milling head. The MULTUS U3000 adds the B-axis tilting milling spindle and full 5-axis simultaneous capability, making it a true 5-axis mill-turn machining center.
03
Turn-Cut is an Okuma-proprietary machining cycle that uses the B-axis and C-axis in combination to mill spherical surfaces, large-diameter bores, and outer diameters that cannot be reached by conventional 5-axis interpolation. It effectively extends the geometric capability of the milling head beyond its physical reach envelope.
04
Yes, the MULTUS U3000 37 kW main spindle and rigid construction are well-suited for difficult materials including titanium, Inconel, and high-strength stainless steels. The ability to machine these materials completely in a single setup is one of the primary use cases for the machine in aerospace and defense.
05
The MULTUS U3000 accommodates bar stock up to 102 mm (4 inches) in diameter. For larger shaft stock or disk-type components, the machine is loaded via overhead crane with the main spindle configured as a chuck-holding face plate.
Videos
CNC Exchange
TopSolid'Blog
chazcam
Okuma America Corporation
MTDCNC
Community Discussions
Community discussion — Multus U3000 Center on B turret - Practical Machinist
Comparison and buying advice — Multus U3000 vs. CTX Beta 1250 TC - Practical Machinist
Community discussion — Mill-turn 5 axis machine recommendations ...
Community discussion — Looking for a new 5 axis mill-turn - Practical Machinist
Community discussion — OSP-P300S-H G41/G42 compensation for milling tools - CNCzone
Community discussion — Okuma Multus U3000 - CNCzone
Community discussion — 5axis on okuma mill turn machines - cnczone.com
Community discussion — Need Help! OKUMA MULTUS U3000 Part Counter (Thinc Api) - CNCzone
Community discussion — Okuma Multus U3000 : r/Machinists - Reddit
Pricing and buying discussion — What are your experience with okuma machines? :
Community discussion — Okuma...Love or Hate? : r/Machinists - Reddit
Comparison and buying advice — Okuma Problem.. : r/Machinists - RedditOkuma OSP P300 Control Comp on milling pocket at an ... - RedditHelping the boss spend money : r/Machinists - RedditWhat does everyone see as the most trusted CNC ... - Reddit
Links to community discussions. Summaries are editorial — visit the original thread for full context.
Related Machines
Mazak Integrex i-200
Okuma Multus B250II
DMG Mori CTX gamma 2000 TC
DMG Mori NTX 2000
DN Solutions SMX 3100ST
