Okuma MU-4000V LL

$350,000 - $550,000 Updated 2026-03-16

Key Specifications

Max Spindle

12,000 RPM

Spindle Taper

No. 40 (BBT40)

Tool Capacity

32 tools (standard)

Rapid Traverse

36/36/36 m/min (X/Y/Z)

Spindle Power

18.5/11 kW (10 min/continuous) (25/15 hp)

table diameter

400 mm (15.7 in)

Overview

The Okuma MU-4000V LL is a vertical trunnion-style 5-axis machining center with an extended 400mm rotary table diameter, designed for simultaneous 5-axis contouring of complex aerospace, medical, and die-mold components. The LL designation indicates the long-long configuration with extended X and Y axis travels, providing a machining envelope capable of handling larger workpieces than the standard MU-4000V. With a 12,000 RPM No. 40 spindle, trunnion A-axis travel of +30/-120 degrees, and C-axis full 360-degree rotation, the MU-4000V LL reaches all five sides of a workpiece in a single setup with true simultaneous 5-axis motion.

Okuma's approach to 5-axis accuracy on the MU series centers on the 5-Axis Auto Tuning System, which automatically measures and compensates for geometric errors in the rotary axis centerlines using an in-machine touch probe cycle. Shops running precision aerospace parts can execute this calibration in under 15 minutes after any crash event or thermal recovery, restoring verified 5-axis geometric accuracy without manual measurement. The OSP-P500M control provides NURBS interpolation, high-speed AI contour control, and full conversational programming support for 5-axis toolpaths.

The MU-4000V LL's trunnion design keeps the workpiece close to the rotary center of gravity, minimizing the moment arm that causes table deflection under heavy cutting loads common in titanium and Inconel aerospace parts. The 400mm table accepts workpieces up to 400mm in diameter and up to 350mm in height in the standard configuration. Chip management on vertical 5-axis machines benefits from gravity assistance — chips fall away from the workpiece naturally during trunnion tilting, reducing chip re-cutting that degrades surface finish.

The MU-4000V LL competes with the DMG Mori DMU 50, Mazak Variaxis i-400, and Makino D200Z in the compact trunnion 5-axis segment. For shops requiring true simultaneous 5-axis capability with Okuma's thermal stability and OSP control ecosystem, the MU-4000V LL is a well-proven platform. New machine pricing typically falls between $350,000 and $550,000. Specs sourced from Okuma Corporation published data.

Full Specifications

Parameter	Value
Table Diameter	400 mm (15.7 in)
X Y Z Travel	560 x 460 x 460 mm (22.0 x 18.1 x 18.1 in)
A Axis Travel	+30 / -120 degrees
C Axis Travel	360 degrees (continuous)
Max Spindle Speed	12,000 RPM
Spindle Taper	No. 40 (BBT40)
Spindle Motor Power	18.5/11 kW (10 min/continuous) (25/15 hp)
Tool Capacity	32 tools (standard)
Rapid Traverse Rate	36/36/36 m/min (X/Y/Z)
Max Table Load	200 kg (441 lb)
CNC Control	Okuma OSP-P500M
5 Axis Auto Tuning	Standard
Thermo Friendly Concept	Standard
Machine Weight	Approx. 10,000 kg (22,046 lb)
Okuma Global Repair Center	Charlotte, North Carolina

Specifications sourced from okuma.com — verified 2026-03-28

Strengths & Limitations

Strengths

5-Axis Auto Tuning System automatically calibrates rotary axis geometric errors using an in-machine probe, restoring verified accuracy after any thermal or crash event in under 15 minutes
Trunnion design keeps workpiece mass near the rotary center of gravity, minimizing table deflection during heavy simultaneous 5-axis cuts in titanium and Inconel
OSP-P500M control provides NURBS interpolation and AI contour control for smooth 5-axis surface finish on complex aerospace and medical geometries
LL configuration's extended X/Y travels accommodate larger workpieces than the standard MU-4000V, increasing the range of parts addressable on a single machine

Limitations

200 kg table load limit restricts the machine to smaller, lighter workpieces — large or heavily fixtured parts approach this limit quickly
32-tool ATC is adequate for most 5-axis programs but may require tool management planning on complex aerospace parts with large tool libraries
Vertical trunnion configuration is less suited to tall, heavy workpieces compared to fork-type or tilting-rotary table designs available on larger 5-axis platforms

Best For

Aerospace job shops producing impellers, blisks, structural brackets, and complex aluminum or titanium parts requiring true simultaneous 5-axis contouring Medical device manufacturers machining bone implants, surgical instruments, and complex titanium components in the 400mm diameter range Mold and die shops producing complex 3D mold cores and cavities, electrodes, and compound-angle features in a single 5-axis setup Precision job shops diversifying from 3-axis VMC work into 5-axis to reduce setups, improve accuracy, and pursue higher-value aerospace and medical contracts

Frequently Asked Questions

01 What does the LL designation mean on the MU-4000V LL?

LL stands for long-long, indicating that both the X and Y axes have been extended beyond the standard MU-4000V configuration. The extended travels increase the available machining envelope for larger workpieces while maintaining the same 400mm rotary table. Shops needing to machine larger flat features, longer profiles, or offset geometries on 5-axis parts benefit from the LL travel range.

02 What is 5-Axis Auto Tuning and when should it be used?

5-Axis Auto Tuning is an OSP control feature that runs an automated geometric calibration cycle using an in-machine touch probe to measure the true positions of the A and C axis centerlines relative to the spindle. It compensates for any deviation from nominal — caused by thermal growth, crash events, or maintenance — and updates the control's kinematic model. It should be run at machine startup, after any suspected crash or contact, and periodically during long production runs on tight-tolerance 5-axis parts.

03 Can the MU-4000V LL machine titanium and Inconel?

Yes. The trunnion design and box-section column provide sufficient rigidity for titanium and nickel superalloy machining with appropriate cutting parameters. At 18.5 kW spindle power, the machine is more suited to lighter cuts in difficult materials than large roughing passes. Many aerospace shops use the MU-4000V LL for finishing and semi-finishing of titanium and Inconel parts, reserving roughing for heavier dedicated machines.

04 How does the MU-4000V LL compare to the DMG Mori DMU 50?

Both machines occupy the compact trunnion 5-axis segment with similar table sizes and travel ranges. The MU-4000V LL differentiates through Okuma's 5-Axis Auto Tuning System for rapid geometric recalibration and the OSP-P500M control's conversational programming features. The DMU 50 offers Siemens or Heidenhain control options that some shops prefer. Machine weight, rigidity, and thermal management approaches differ; both are respected platforms in the compact 5-axis class.

05 What CAM software works with the MU-4000V LL?

All major CAM systems support the MU-4000V LL through Okuma OSP-compatible post processors, including Mastercam, Siemens NX, Hypermill, Esprit, and Powermill. Okuma's OSP-P500M control accepts standard G-code and EIA/ISO format programs. Shops using 5-axis CAM should verify they are using a proven Okuma 5-axis post processor — many CAM vendors offer verified Okuma posts directly or through their post library.