Nakamura-Tome NTX 2500
Key Specifications
X Travel
Y Travel
Z Travel
Rapid Traverse
Max Turn Length
max bar capacity
Overview
The Nakamura-Tome NTX 2500 is a large-capacity multi-tasking turning center that combines heavy-duty turning capability with a powerful B-axis milling spindle for true done-in-one machining of complex parts. As the biggest machine in Nakamura-Tome's NTX series, the NTX 2500 handles bar stock up to 80 mm (3.15 in) and chuck work up to 660 mm (26 in) diameter, putting it firmly in the medium-to-large turning category where it competes against the Mazak Integrex i-400, DMG Mori NTX 2500, and Okuma Multus B400II.
The main spindle delivers 22 kW (30 hp) at speeds up to 3,500 RPM with a maximum torque of 700 Nm, providing the power needed for heavy roughing of steel forgings and large-diameter castings. The sub-spindle matches with 15 kW (20 hp) at 4,500 RPM. Both spindles feature C-axis for positioned milling operations. The B-axis milling spindle provides +/-120 degrees of swivel with 12,000 RPM and 11 kW (15 hp), enabling angled holes, contoured pockets, spline cutting, and complex 5-axis interpolated machining operations.
X/Z travels of 260 x 795 mm provide a generous turning envelope, and the Y-axis travel of 230 mm (+/-115 mm) enables off-center milling and drilling operations. The lower turret adds a second tool path for simultaneous cutting with the B-axis spindle, enabling balanced turning and multi-tool operations that dramatically reduce cycle times on complex parts. Total tool capacity reaches up to 72 tools across the B-axis magazine and lower turret stations.
Nakamura-Tome's NT Smart Machining technology includes thermal compensation, tool monitoring, and vibration detection that protect both the machine and the workpiece during unattended production. The Fanuc 31i-B5 control manages multi-channel programming with superimposed axis control. New NTX 2500 machines price between $500,000 and $750,000 depending on configuration. Nakamura-Tome's exclusive focus on multi-axis turning — they build nothing else — results in a refined, purpose-built machine that multi-brand builders have difficulty matching.
Full Specifications
| Parameter | Value |
|---|---|
| Max Bar Capacity | 80 mm (3.15 in) |
| Max Turning Diameter | 660 mm (26 in) |
| Max Turning Length | 795 mm (31.3 in) |
| Main Spindle Speed | 3,500 RPM |
| Main Spindle Power | 22 kW (30 hp) |
| Main Spindle Torque | 700 Nm (516 ft-lb) |
| Sub Spindle Speed | 4,500 RPM |
| Sub Spindle Power | 15 kW (20 hp) |
| B Axis Range | +/- 120° |
| Milling Spindle Speed | 12,000 RPM |
| Milling Spindle Power | 11 kW (15 hp) |
| X-Axis Travel | 260 mm (10.24 in) |
| Y-Axis Travel | 230 mm (+/- 115 mm / 9.06 in) |
| Z-Axis Travel | 795 mm (31.3 in) |
| C Axis | Main and sub-spindle |
| Total Tool Capacity | Up to 72 tools |
| Lower Turret | 12-station turret with live tooling |
| Rapid Traverse Rate | 30 m/min (1,181 ipm) |
| CNC Control | Fanuc 31i-B5 |
| Machine Weight | 12,000 kg (26,455 lb) approx. |
Specifications sourced from nakamura-tome.co.jp — verified 2026-03-28
Strengths & Limitations
Strengths
- 660 mm maximum turning diameter and 80 mm bar capacity handle medium-to-large parts that exceed the capacity of smaller NTX models, covering a wide range of industrial components
- B-axis milling spindle with +/-120 degree swivel and 12,000 RPM enables true 5-axis interpolated machining, eliminating secondary operations on mill-turn parts
- Dual cutting paths (B-axis spindle + lower turret) enable simultaneous cutting operations that reduce cycle times by 30-50% on complex parts compared to single-turret machines
- 700 Nm main spindle torque provides the power for heavy roughing of steel forgings, large-diameter bar stock, and tough alloys without spindle stalling
- Nakamura-Tome's exclusive focus on multi-axis turning means the NTX 2500 is purpose-built by engineers who design nothing but turning centers — not a milling machine adapted for turning
- NT Smart Machining with thermal compensation, tool monitoring, and vibration detection enables reliable unattended production of high-value parts
Limitations
- 3,500 RPM maximum main spindle speed limits high-speed finishing strategies on small-diameter features — shops doing extensive small-diameter work may need a faster spindle
- $500,000-$750,000 new price is a significant investment that requires sufficient multi-tasking work volume to justify over separate lathe and mill purchases
- Nakamura-Tome's North American dealer network is smaller than Mazak, DMG Mori, and Okuma, though Methods Machine Tools provides strong representation in many regions
- Multi-channel programming for simultaneous B-axis and lower turret operations requires skilled programmers, with a steeper learning curve than single-turret CNC lathes
Best For
Frequently Asked Questions
01
New NTX 2500 machines price between $500,000 and $750,000 depending on configuration. Key options that drive price include tool magazine capacity (up to 72 tools), bar feeder, parts catcher, high-pressure coolant, and gantry loader automation. Used NTX 2500 machines from 2017-2022 trade between $250,000 and $450,000 depending on hours, configuration, and condition. Methods Machine Tools is the primary North American distributor.
02
Both are large-format mill-turn machines targeting similar applications. The Mazak Integrex i-400 offers a slightly larger turning diameter (660 vs 660 mm) with Mazak's SmoothAi control and extensive service network. The Nakamura-Tome NTX 2500 counters with its purpose-built turning center DNA, NT Smart Machining technology, and a lower turret configuration optimized for simultaneous cutting. Mazak has the stronger service network; Nakamura-Tome has the turning specialist advantage.
03
NT Smart Machining is Nakamura-Tome's suite of intelligent machine functions including: thermal displacement compensation that maintains accuracy during warm-up and throughout production shifts, tool breakage and wear monitoring that detects abnormal cutting conditions and stops the machine before damage occurs, and vibration analysis that identifies chatter onset and recommends parameter adjustments. These features collectively enable reliable unattended production of high-value parts.
04
For many part families, yes. The B-axis milling spindle provides true 5-axis interpolation capability that can replace 3+2 and simultaneous 5-axis milling operations. However, the 11 kW milling spindle is less powerful than a dedicated 5-axis machining center, so parts requiring heavy milling (large pockets, extensive face milling) may still benefit from a separate mill. The NTX 2500 excels when parts are primarily turned with significant milling content — not the other way around.
05
The NTX 2500's B-axis spindle and lower turret can engage the workpiece simultaneously from different positions, each performing independent cutting operations. For example, the lower turret can rough-turn an OD while the B-axis spindle drills a cross-hole, or the lower turret can turn the main spindle side while the B-axis finishes the sub-spindle side. This parallel processing can reduce cycle times by 30-50% on parts with both turning and milling content.
06
Methods Machine Tools is the exclusive North American distributor for Nakamura-Tome. Methods provides sales, applications engineering, service, parts, and training through their network of technology centers across the United States and Canada. Methods has represented Nakamura-Tome for decades and maintains experienced multi-axis turning specialists on staff. Their technology centers stock common parts and provide hands-on demonstrations.
Videos
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