Okuma VTM-2000YB
Key Specifications
Max Spindle
Tool Capacity
Rapid Traverse
Spindle Power
max turning diameter
max workpiece height
Overview
The Okuma VTM-2000YB is the largest machine in Okuma's vertical turning and milling lineup, capable of handling workpieces up to 2,000 mm (78.7 in) diameter. This is a factory-floor anchor machine for heavy industry, designed to turn and mill massive castings, forgings, and fabricated assemblies that would otherwise require a vertical boring mill and one or more horizontal machining centers in separate operations.
The table spindle delivers 75/55 kW (100/74 hp) at up to 250 RPM with 4,000 Nm (2,950 ft-lb) of torque. Maximum workpiece height is 1,200 mm (47.2 in) with a table load capacity of 8,000 kg (17,637 lb). The massive faceplate accepts workpieces clamped with T-slots and jaws for irregularly shaped castings that exceed standard chuck capacity.
The milling spindle runs up to 6,000 RPM with 45/37 kW (60/50 hp) through a CAT 50 taper. The B-axis tilts from -30 to +120 degrees for angled boring, drilling, and contouring. X-axis travel is 1,500 mm (59.1 in), Y-axis is 700 mm (27.6 in), and Z-axis is 1,250 mm (49.2 in). The ATC holds 40 tools standard with options up to 120.
Rapid traverse is 15 m/min on linear axes. Box guideways are used throughout for maximum vibration damping and load-carrying capacity. At this scale, Okuma's Thermo-Friendly Concept is indispensable; a machine with 2,000 mm swing generates enormous thermal gradients during multi-hour roughing cycles that would otherwise create unacceptable dimensional drift.
The VTM-2000YB competes with machines from Toshiba, Hankook, and You Ji in the large VTL space. Very few manufacturers offer integrated milling capability at this diameter. Pricing runs $1,200,000-$2,000,000+ new. Machine weight is approximately 65,000 kg (143,300 lb). The machine targets power generation, shipbuilding, mining equipment, and large oil and gas component manufacturers.
Full Specifications
| Parameter | Value |
|---|---|
| Max Turning Diameter | 2,000 mm (78.7 in) |
| Max Workpiece Height | 1,200 mm (47.2 in) |
| Table Speed Max | 250 RPM |
| Table Power | 75/55 kW (100/74 hp) |
| Table Torque | 4,000 Nm (2,950 ft-lb) |
| Milling Spindle Speed | 6,000 RPM |
| Milling Spindle Power | 45/37 kW (60/50 hp) |
| Milling Spindle Taper | CAT 50 |
| B Axis Range | -30° to +120° |
| X Axis Travel | 1,600 |
| Y Axis Travel | 1,600 <±800> |
| Z Axis Travel | 1,400 |
| Tool Capacity | 40 (options: 60, 80, 120) |
| Max Table Load | 8,000 kg (17,637 lb) |
| Rapid Traverse Rate | 15 m/min (X, Y, Z) |
| Machine Weight | 65,000 kg (143,300 lb) |
| CNC Control | Okuma OSP-P500 |
| Max Cutting Diameter | Ø2,000 |
| Max Cutting Length | 1,400 |
| Rapid Traverse Xyz | 32 |
| Rapid Traverse Bc | 19.5 : 20 |
| Max Spindle Speed | min⁻¹ |
| Spindle Motor Power | 30/22 |
| Rapid Traverse B C | 19.5 : 20 |
| Okuma Global Repair Center | Charlotte, North Carolina |
| Inches | Metric |
| Spindle Speed | 4~300 [4~200] |
Specifications sourced from okuma.com — verified 2026-03-28
Strengths & Limitations
Strengths
- 2,000 mm turning diameter with 8,000 kg table load handles the largest castings and forgings in power generation and heavy industry
- Integrated milling spindle with Y-axis and B-axis eliminates the need to transfer massive workpieces to a separate machining center
- 4,000 Nm table torque enables deep roughing on large-diameter castings without stalling, even with heavy interrupted cuts
- CAT 50 milling spindle at 45 kW provides genuine heavy-duty machining center capability at this scale
- Thermo-Friendly Concept is indispensable at this size, maintaining accuracy across multi-hour roughing-to-finishing cycles
- Very few competitors offer integrated turning and milling at this diameter, giving Okuma a significant market position
Limitations
- Capital investment of $1,200,000-$2,000,000+ limits the machine to shops with consistent large-part volume or government/defense contracts
- 65,000 kg machine weight requires purpose-built foundation with engineering analysis for soil bearing capacity and vibration isolation
- 250 RPM maximum table speed produces low surface footage even at moderate diameters within the machine's massive envelope
- 15 m/min rapid traverse results in significant non-cutting time during tool changes and repositioning on complex parts
- OSP control at this programming complexity requires highly experienced operators and advanced CAM software with dedicated post-processors
Best For
Frequently Asked Questions
01
A new VTM-2000YB typically runs $1,200,000-$2,000,000+ depending on configuration, tooling, and site preparation. Foundation engineering, rigging, and installation add significant cost beyond the machine price. This is a capital equipment decision that typically requires board-level approval.
02
At 65,000 kg, the VTM-2000YB requires a purpose-built reinforced concrete foundation engineered for the specific soil conditions at the installation site. Foundation depth, anchor bolt patterns, and vibration isolation must be designed by a structural engineer using Okuma's foundation drawings. Some installations require pile-driven foundations.
03
The VTM-2000YB replaces a manual VBM and adds CNC milling capability. Cycle times are dramatically shorter, accuracy is consistent via Thermo-Friendly Concept, and the milling spindle eliminates transferring the workpiece to a separate machine. Operator skill requirements shift from manual machining expertise to CNC programming and setup.
04
Power generation (turbines, generators), shipbuilding (propulsion, structural), oil and gas (subsea, drilling), mining (crushers, mills), and defense (naval, ground vehicles). Any industry machining large-diameter castings, forgings, or fabrications benefits from the VTM-2000YB's combined turning and milling capability.
05
Yes, the large faceplate accepts T-slot clamping for irregularly shaped castings and fabrications that don't fit standard chucks. Custom fixturing can accommodate asymmetric parts. The Collision Avoidance System is essential for safe programming around non-standard workpiece geometries.
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