Okuma MILLAC 800VH
Key Specifications
X Travel
Y Travel
Z Travel
Max Spindle
Spindle Taper
Tool Capacity
Overview
The Okuma MILLAC 800VH is a large-capacity 5-axis vertical machining center designed for machining oversized components that exceed the work envelope of trunnion-style 5-axis machines. The VH designation indicates a vertical spindle with a horizontal rotary/tilt table configuration, where the B-axis tilts and C-axis rotates to position large workpieces under the spindle. This architecture handles parts too heavy and too large for conventional trunnion tables.
Travel measures 1,200 x 1,050 x 600 mm (47.2 x 41.3 x 23.6 in) on the linear axes, giving the machine a massive work envelope for aerospace structural components and large die/mold work. The B-axis tilts from +10 to -110 degrees, and the C-axis rotates 360 degrees continuously. The rotary table is 800 mm (31.5 in) in diameter with a maximum table load of 1,000 kg (2,205 lb), supporting large castings, forgings, and weldments.
The spindle runs at 10,000 RPM with 22/15 kW (30/20 hp) through a No. 50 (BT 50) taper, providing the heavy-duty tool clamping force needed for large-diameter face mills and long-reach tooling on big parts. A No. 40 spindle option with higher RPM is available for shops that prioritize speed over tool size. The standard ATC holds 40 tools, with options to 60 or 80 positions.
Rapid traverse hits 40 m/min (1,575 ipm) on all three linear axes. Machine weight is approximately 20,000 kg (44,092 lb), putting significant mass behind every cut. The double-column construction provides the structural rigidity needed for heavy 5-axis machining at the tilt angles where other machine architectures lose stiffness.
The OSP-P500 control comes standard with Thermo-Friendly Concept, Collision Avoidance System, and 5-Axis Auto Tuning. Floor space runs approximately 4,900 x 4,200 mm (193 x 165 in). New pricing typically ranges from $500,000-$700,000 depending on spindle configuration and options. The MILLAC 800VH competes with machines like the DMG Mori DMU 100 P duoBLOCK, Mazak VARIAXIS i-800, and Hermle C 52 U for large 5-axis vertical machining applications.
Full Specifications
| Parameter | Value |
|---|---|
| X-Axis Travel | 1,200 mm (47.2 in) |
| Y-Axis Travel | 1,050 mm (41.3 in) |
| Z-Axis Travel | 600 mm (23.6 in) |
| B Axis Range | +10° to -110° (tilt) |
| C Axis Range | 360° (continuous rotation) |
| Max Spindle Speed | min⁻¹ |
| Spindle Taper | No. 50 (BT 50) |
| Spindle Motor Power | 22/18.5 |
| Tool Capacity | 40 (60, 80 optional) |
| Table Size | mm |
| Max Table Load | 1,000 kg (2,205 lb) |
| Rapid Traverse Rate | 3,600 |
| Machine Weight | 20,000 kg (44,092 lb) |
| Floor Space | 4,900 x 4,200 mm (193 x 165 in) |
| CNC Control | Okuma OSP-P500 |
| Travel Xyz | 1,020 |
| Max Load | 1,000 |
| Rapid Traverse Xyz | 30 |
| Okuma Global Repair Center | Charlotte, North Carolina |
| Inches | Metric |
| Table Dimensions | 800 x 800 |
| Spindle Speed | 100~10,000 |
Specifications sourced from okuma.com — verified 2026-03-28
Strengths & Limitations
Strengths
- 800 mm rotary table with 1,000 kg load capacity handles large aerospace and die/mold components that exceed the capacity of trunnion-style 5-axis machines
- 1,200 x 1,050 x 600 mm travel envelope provides the room needed for oversized parts without sacrificing 5-axis access angles
- No. 50 taper spindle delivers the tool clamping force required for large-diameter face mills and long-reach boring bars on heavy parts
- 20,000 kg machine mass with double-column construction provides exceptional vibration damping for aggressive cuts in steel, titanium, and Inconel
- Thermo-Friendly Concept and 5-Axis Auto Tuning standard on the OSP-P500 maintain accuracy across the large machine structure during extended cycle times
- B/C-axis table-tilt architecture keeps the spindle vertical, which is more intuitive for operators transitioning from standard VMCs to 5-axis work
Limitations
- 4,900 x 4,200 mm footprint requires substantial floor space and clear overhead for crane loading of heavy workpieces onto the tilting table
- 20,000 kg machine weight demands a reinforced foundation, limiting installation options in older facilities with standard concrete floors
- 10,000 RPM maximum spindle speed is conservative for high-speed aluminum finishing; shops doing significant aluminum work should evaluate the high-speed spindle option
- Starting price of $500,000 positions this well above entry-level 5-axis machines, requiring consistent large-part work to justify the investment
- No. 50 taper tooling is more expensive and heavier than No. 40, increasing the overall tooling investment
Best For
Frequently Asked Questions
01
New pricing ranges from $500,000-$700,000 depending on spindle configuration, tool magazine size, and options like probing, through-spindle coolant, and chip management systems. The BT 50 base configuration starts at the lower end, while high-RPM spindle options and expanded magazines push toward the upper range.
02
The MILLAC 800VH is a significantly larger machine with an 800 mm table (vs 500 mm), 1,000 kg load capacity (vs 500 kg), and No. 50 taper (vs No. 40). It's designed for parts that won't fit on the MU-5000V. The MU-5000V is more versatile for medium-sized parts and offers more spindle speed options. Choose based on your typical part size and weight.
03
The VH designation means vertical spindle with horizontal rotary/tilt table. The B-axis tilts the table while the C-axis rotates it, positioning the workpiece under a vertical spindle. This architecture handles heavier parts than trunnion designs because the table doesn't need to fully invert the workpiece. Standard MILLAC machines are typically 3-axis or 4-axis horizontal configurations.
04
Absolutely. The No. 50 taper provides maximum tool clamping force, and the 20,000 kg machine mass absorbs vibration from aggressive cuts. The double-column construction maintains rigidity even with the table tilted at demanding angles. This machine is specifically designed for heavy material removal on large workpieces.
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