Nakamura-Tome WTW-300

$650,000 - $900,000 Updated 2026-03-17

Key Specifications

Maximum Bar Capacity

76 mm (3 in)

Maximum Chuck Diameter (Main)

300 mm (12 in)

Maximum Chuck Diameter (Sub)

300 mm (12 in)

Maximum Turning Diameter

340 mm

Maximum Turning Length

1,000 mm

Main Spindle Speed (Max)

4,000 rpm

Overview

The Nakamura-Tome WTW-300 is a twin-spindle, twin-turret turning/milling center designed for complete machining of complex turned parts in a single setup. Building on Nakamura-Tome WTW (Work Transfer with Twin spindle) concept, the WTW-300 accommodates larger workpieces than the WTW-150 series, handling bar stock up to 76 mm (3 inches) and chuck work up to 300 mm in diameter. Both main and sub-spindles are full-power units capable of primary machining, enabling simultaneous front and back machining that dramatically reduces cycle times.

Each turret on the WTW-300 supports live tooling, allowing milling, drilling, tapping, and contouring operations on both spindles concurrently. The dual-turret, dual-spindle architecture means the machine can perform four independent cutting operations simultaneously across both spindles, subject to collision avoidance. This level of concurrent cutting makes the WTW-300 particularly efficient for complex parts that would otherwise require multiple operations across separate machines.

Nakamura-Tome equips the WTW-300 with its NT Smart X CNC system based on FANUC, incorporating conversational programming, tool life management, and collision simulation. The control guides operators through complex multi-axis setups without requiring extensive G-code expertise, making the machine accessible to shops transitioning from simpler lathes to full multi-tasking platforms.

The WTW-300 is well positioned for aerospace structural fittings, oil and gas valve bodies, hydraulic manifolds, and automotive powertrain components where complexity and tight tolerances demand complete machining in a single setup. Completing both ends of a part without re-chucking maintains concentricity and positional relationships between features that would otherwise be compromised.

Full Specifications

Parameter	Value
Maximum Bar Capacity	76 mm (3 in)
Maximum Chuck Diameter (Main)	300 mm (12 in)
Maximum Chuck Diameter (Sub)	300 mm (12 in)
Maximum Turning Diameter	340 mm
Maximum Turning Length	1,000 mm
Main Spindle Speed (Max)	4,000 rpm
Main Spindle Power	37 kW
Sub Spindle Speed (Max)	4,000 rpm
Sub Spindle Power	22 kW
Number Of Turret Stations (Each Turret)	12
Live Tooling Speed (Max)	6,000 rpm
Y-Axis Stroke	+/-52 mm per turret
Control	FANUC 31i-B (NT Smart X)

Specifications sourced from nakamura-tome.co.jp — verified 2026-03-28

Strengths & Limitations

Strengths

Twin full-power spindles enable simultaneous front-and-back machining, cutting cycle time nearly in half versus single-spindle machines
Dual turrets with live tooling allow up to four concurrent cutting axes for maximum throughput
Y-axis on both turrets allows complex off-center milling and cross-drilled features without additional setups
NT Smart X control with conversational programming reduces setup time for complex mill-turn parts
Large bar capacity (76 mm) and chuck capacity (300 mm) cover a wide range of turned component sizes

Limitations

High capital cost and programming complexity compared to single-turret turning centers
Concurrent multi-axis toolpaths require careful collision simulation; setup errors can be costly
Large machine footprint requires dedicated floor space and robust foundation

Best For

Aerospace and defense fittings requiring complete machining of both ends with tight positional tolerances Oil and gas valve bodies and manifolds with complex port patterns and sealing surface requirements Automotive transmission and driveline components needing simultaneous multi-surface machining Contract shops processing medium-volume batches of complex turned parts where cycle time reduction is a competitive advantage

Frequently Asked Questions

01 What is the difference between the WTW-300 and WTW-150II?

The WTW-150II targets smaller bar work up to approximately 51 mm bar stock and is designed for compact high-speed production of smaller turned components. The WTW-300 handles significantly larger parts up to 76 mm bar and 300 mm chuck diameter, making it appropriate for heavier aerospace, oil and gas, and automotive driveline components.

02 Can both turrets cut simultaneously on the same spindle?

Yes. The WTW-300 supports gang-turret operation where both upper and lower turrets engage the same spindle simultaneously, subject to geometric and collision constraints. This is useful for balanced turning operations that minimize workpiece deflection on slender parts.

03 Does the WTW-300 support Y-axis milling?

Yes. Both turrets have Y-axis movement of +/-52 mm, enabling off-center milling, angled hole drilling, and complex contour milling on both the main and sub spindle sides without repositioning the workpiece.

04 What is the NT Smart X control system?

NT Smart X is Nakamura-Tome proprietary control interface layered over a FANUC 31i-B platform. It includes conversational mill-turn programming, visual toolpath simulation with collision checking, integrated tool life management, and barfeeder communication, all designed to reduce setup time on complex multi-axis jobs.

05 Is the WTW-300 suitable for bar fed production?

Yes. The WTW-300 is compatible with standard 12-foot bar feeders via its 76 mm spindle bore, well suited to long unmanned production runs with automatic part transfer to the sub-spindle for back-end operations.