Okuma MU-8000V
Key Specifications
Max Spindle
Tool Capacity
Table Size
Rapid Traverse
Spindle Power
trunnion type
Overview
The Okuma MU-8000V is the largest machine in Okuma's MU-V series of 5-axis vertical machining centers, featuring an 800 x 630 mm trunnion table for machining medium-to-large parts requiring simultaneous 5-axis contouring. The dual-support trunnion design maintains rigidity across the larger work envelope, enabling both milling and optional turning operations on workpieces that exceed the capacity of the smaller MU-4000V and MU-6300V.
Two spindle configurations are available: 10,000 RPM and 6,000 RPM, both producing 11 kW (15 hp) at 10-minute rating and 7.5 kW (10 hp) continuous. Tool storage holds 32 tools. Machine dimensions are 5,280 x 2,990 x 3,625 mm. Ball screw cooling is standard equipment for thermal stability across extended machining cycles.
The MU-8000V is purpose-built for shops that need 5-axis capability on larger parts than the MU-6300V can handle — applications like medium-sized aerospace structural components, complex castings, and multi-feature parts that require simultaneous 5-axis access from multiple angles. The dual-support trunnion provides the rigidity foundation for both precision finishing and moderate roughing operations.
The machine runs on Okuma's OSP control with Thermo-Friendly Concept, Anti-Crash System, Five-Tuning calibration, and Process Navi. The MU-8000V competes with the Mazak VARIAXIS i-800, DMG Mori DMU 80, and Hermle C 42 in the large 5-axis VMC segment. Okuma differentiates with the Five-Tuning system and optional turning capability that many competitors do not offer at this size. New MU-8000V machines price in the $400,000 to $600,000 range. Specs sourced from Okuma Corporation published data.
Full Specifications
| Parameter | Value |
|---|---|
| Table Size | Ø800 |
| Max Spindle Speed | min⁻¹ |
| Spindle Motor Power | kW |
| Tool Capacity | 32 tools |
| Trunnion Type | Dual-support (both-end-supported) |
| Ball Screw Cooling | Standard |
| CNC Control | Okuma OSP-P500M |
| Machine Dimensions | 5,280 x 2,990 x 3,625 mm (207.9 x 117.7 x 142.7 in) (W x D x H) |
| Thermo Friendly Concept | Standard |
| Anti Crash System | Standard |
| Five Tuning | Standard |
| Process Navi | Standard |
| Servo Navi | Standard |
| Max Machining Volume | Ø1000 x 550 |
| Rapid Traverse Rate | 50 |
| Okuma Global Repair Center | Charlotte, North Carolina |
| Inches | Metric |
| Spindle Speed | 10,000 [15K, 20K, 25K] |
| Spindle Motor Power | 11/7.5 |
| Magazine Capacity | 32 [48, 64] |
Specifications sourced from okuma.com — verified 2026-03-28
Strengths & Limitations
Strengths
- 800 x 630 mm trunnion table accommodates medium-to-large parts requiring 5-axis capability that exceed the capacity of ø630mm table machines
- Dual-support trunnion design provides rigidity for simultaneous 5-axis contouring on larger, heavier workpieces
- Ball screw cooling as standard equipment reduces thermal growth on extended 5-axis machining cycles
- Five-Tuning calibration system enables regular 5-axis accuracy verification without external metrology technicians
- Thermo-Friendly Concept is critical on larger 5-axis machines where thermal effects on trunnion geometry cause cumulative accuracy errors
- Optional turning capability enables combined mill-turn operations on larger workpieces that benefit from single-setup machining
Limitations
- 11 kW spindle power is modest for the largest machine in the MU-V series — heavy roughing capability is limited compared to competitors with 22-30 kW spindles
- 32-tool magazine may be insufficient for complex 5-axis parts that require many specialized cutting tools
- 10,000 RPM maximum spindle speed is conservative for high-speed 5-axis finishing of aluminum and composites
- Machine footprint of 5,280 x 2,990 mm is significant for a 5-axis VMC, requiring dedicated floor space
- Lower spindle power-to-table-size ratio compared to the MU-4000V means less aggressive cutting parameters are practical
Best For
Frequently Asked Questions
01
New MU-8000V machines typically price between $400,000 and $600,000 depending on spindle configuration, turning capability, and options. The turning mode, expanded tool magazines, and high-pressure coolant add to the base price. Used MU-8000V machines from 2012-2020 trade between $180,000 and $350,000.
02
The MU-8000V steps up to an 800 x 630 mm table (vs ø630 mm round) for larger workpieces. Both share the same 11 kW spindle power and 10,000/6,000 RPM speed options. The MU-8000V is physically larger at 5,280 mm wide vs 4,850 mm. Choose the MU-8000V when your parts need the larger table, and the MU-6300V when ø630 mm capacity is sufficient.
03
11 kW is adequate for precision finishing and light-to-moderate roughing across aluminum, steel, and light alloys. For aggressive roughing on larger parts in the MU-8000V's work envelope, the spindle power is a limitation. Shops doing heavy roughing on large 5-axis parts should consider the DMG Mori DMU 80 or similar machines with higher spindle power, or use a separate roughing machine before transferring to the MU-8000V for finishing.
04
While Okuma does not prominently publish the maximum table load for the MU-8000V, the dual-support trunnion design on an 800 x 630 mm table is engineered for workpieces in the 500-1,000 kg range depending on geometry and fixture configuration. Contact Okuma directly for your specific application requirements.
Videos
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