Okuma VTM-1200YB

$800,000 - $1,200,000 Updated 2026-03-13

Key Specifications

Tool Capacity

40 (options: 60, 80, 120)

Rapid Traverse

20 m/min (X, Y, Z)

max turning diameter

1,250 mm (49.2 in)

max workpiece height

900 mm (35.4 in)

table speed max

400 RPM

table power

55/45 kW (74/60 hp)

Overview

The Okuma VTM-1200YB is a large-capacity vertical turning and milling center with Y-axis and B-axis multitasking capability for workpieces up to 1,250 mm (49.2 in) diameter. This machine occupies the heavy end of Okuma's VTM lineup, targeting manufacturers who need to turn and mill large castings, forgings, and fabrications in a single chucking rather than transferring between a vertical boring mill and a horizontal machining center.

The table spindle delivers 55/45 kW (74/60 hp) at up to 400 RPM with 2,000 Nm (1,475 ft-lb) of torque. Maximum workpiece height is 900 mm (35.4 in) with a table load capacity of 3,000 kg (6,614 lb). The massive table uses a direct-drive motor for C-axis positioning during milling operations. Chuck capacity extends to 40 inches (1,016 mm).

The milling spindle runs up to 10,000 RPM with 37/30 kW (50/40 hp) through a CAT 50 taper, providing the rigidity needed for heavy boring and face milling on large components. The B-axis tilts from -30 to +120 degrees. X-axis travel is 1,000 mm (39.4 in), Y-axis is 550 mm (21.7 in), and Z-axis is 900 mm (35.4 in). The ATC holds 40 tools standard with options up to 120.

Rapid traverse is 20 m/min on linear axes. The machine uses box guideways for maximum vibration damping on interrupted cuts common with large castings. Okuma's Thermo-Friendly Concept is essential at this scale, where thermal growth across the massive machine structure can produce significant dimensional drift during multi-hour machining cycles.

The VTM-1200YB competes with the Mazak Integrex e-1060V, DMG Mori CTX gamma 3000 TC, and You Ji VTL+C series with milling. Pricing runs $800,000-$1,200,000 new. Machine weight is approximately 40,000 kg (88,185 lb). The machine targets energy, shipbuilding, heavy equipment, and large aerospace component manufacturers.

Full Specifications

Parameter	Value
Max Turning Diameter	1,250 mm (49.2 in)
Max Workpiece Height	900 mm (35.4 in)
Table Speed Max	400 RPM
Table Power	55/45 kW (74/60 hp)
Table Torque	2,000 Nm (1,475 ft-lb)
Milling Spindle Speed	40~10,000
Milling Spindle Power	50/40/30 (3 min/30 min/cont)
Milling Spindle Taper	CAT 50
B Axis Range	-30° to +120°
X Axis Travel	1,270
Y Axis Travel	1,000 (-500 to +500) [1,240 (-620 to +620)]
Z Axis Travel	1,080 [1,530]
Tool Capacity	40 (options: 60, 80, 120)
Max Table Load	3,000 kg (6,614 lb)
Rapid Traverse Rate	20 m/min (X, Y, Z)
Machine Weight	40,000 kg (88,185 lb)
CNC Control	Okuma OSP-P300L
Max Cutting Diameter	Ø1,200
Max Cutting Length	1,080
Rapid Traverse Xyz	32
Rapid Traverse Cb	20:19.5
Table Spindle Speed	5~500 [4~400]
Table Spindle Power	30/22
Okuma Global Repair Center	Charlotte, North Carolina
Inches	Metric

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

Strengths & Limitations

Strengths

1,250 mm turning diameter with 3,000 kg table load handles the large castings and forgings typical of energy and heavy equipment manufacturing
CAT 50 milling spindle at 37 kW provides heavy-duty machining center capability for boring, face milling, and deep-hole drilling on large parts
Y-axis and B-axis enable off-center and angled machining that would otherwise require transferring the workpiece to a separate machining center
2,000 Nm table torque enables deep roughing in large-diameter castings without stalling even on interrupted cuts
Box guideways provide superior vibration damping essential for the interrupted cuts and heavy loads at this machine's scale
Single-setup capability eliminates the costly and risky process of transferring large, heavy workpieces between machines

Limitations

Capital cost of $800,000-$1,200,000 limits the machine to shops with consistent large-part volume or very high-value components
40,000 kg weight requires serious foundation engineering including reinforced concrete pads with adequate depth and anchor provisions
400 RPM maximum table speed limits turning surface footage even at moderate diameters within the machine's envelope
20 m/min rapid traverse adds significant non-cutting time on tool-intensive jobs with frequent repositioning
OSP control for combined turning-milling programming at this complexity level requires experienced programmers and advanced CAM software

Best For

Energy sector manufacturers machining large turbine casings, generator housings, and pressure vessel components Oil and gas shops producing large valve bodies, BOP stacks, and manifold blocks requiring turned and milled features Shipbuilding companies machining propulsion components, shaft housings, and large flanged assemblies Heavy equipment manufacturers turning and milling large castings for mining, construction, and agricultural equipment Aerospace manufacturers machining large engine casings and structural rings up to 1,250 mm diameter Shops replacing a manual vertical boring mill plus a large HMC with a single CNC multitasking platform

Frequently Asked Questions

01 What does an Okuma VTM-1200YB cost?

A new VTM-1200YB typically runs $800,000-$1,200,000 depending on milling spindle options, tool magazine capacity, and automation peripherals. Foundation preparation and rigging add significant additional cost. The machine justifies its price for shops that currently move large parts between multiple machines.

02 How does the VTM-1200YB compare to the VTM-100?

The VTM-1200YB has a 1,250 mm turning diameter versus 1,000 mm, 3,000 kg table load versus 1,500 kg, more powerful spindles, and larger axis travels. The VTM-1200YB also adds Y-axis capability. It targets significantly larger workpieces and commands roughly 50% more capital investment.

03 What foundation does the VTM-1200YB require?

At 40,000 kg, the VTM-1200YB requires a reinforced concrete foundation specifically engineered for the machine's weight distribution and dynamic cutting forces. Okuma provides foundation drawings. Shops must typically pour a dedicated pad with adequate depth, anchor bolt provisions, and vibration isolation from adjacent machines.

04 Can the VTM-1200YB replace a manual vertical boring mill?

Yes, the VTM-1200YB replaces a manual VBM and adds milling capability. Cycle times are dramatically shorter than manual machining, accuracy is consistent, and the milling spindle eliminates secondary operations. Many shops purchasing VTM-1200YBs are replacing aging manual VBMs to improve throughput and reduce skilled-operator dependency.