Nakamura-Tome Mill-Turn / Multi-Tasking Machines

Nakamura-Tome NTRX-300

Est. $340,000 - $500,000 Specs verified 2026-10-03 · nakamura-tome.com Updated 2026-10-03

Image: nakamura-tome.com, Nakamura-Tome

Key Specifications

Max Spindle

4,500 rpm (Ø71 mm option: 3,500 rpm; Ø80 mmB option: 2,500 rpm)

Spindle Power

15 / 11 kW, 22 / 18.5 kW(optional) (Ø80 mmA option: 22 / 18.5 kW(optional))

Max Turn Length

1,100 mm (43.3 in)

max turning diameter

640 mm (25.2 in)

sub spindle speed

2,500 rpm

sub spindle power

15 kW (20 hp)

How much does the Nakamura-Tome NTRX-300 cost?

Estimated price range

Est.$340,000 - $500,000

Our best estimate for a mill-turn / multi-tasking machine in this class — not a quote from Nakamura-Tome. Configuration moves it a long way.

Overview

The Nakamura-Tome NTRX-300 is a large turn-mill center with a 640 mm (25.2 in) turning diameter and 1,100 mm (43.3 in) of turning length. Above the part sits a 15 kW (20 hp) milling spindle fed by 24 tools (40 or 80 optional); below it, a 12-station lower turret with driven tools at 5,000 RPM. The main spindle runs to 4,500 rpm on 15 / 11 kW, with 22 / 18.5 kW optional, and takes chucks of 8 in or 10 in, with 12 in and 15 in and up available as options.

The 640 mm (25.2 in) diameter is the figure that defines it. Flanges, housings and large valve bodies can be turned and then milled in the same setup, with the 15 kW (20 hp) milling spindle doing the heavy cutting. Distance between spindles ranges from min. 250 mm (9.8 in) to max. 1,350 mm (53.1 in), so short parts can be handed over quickly and long ones still fit.

The sub-spindle is the limit to plan around. It is rated 15 kW (20 hp) but runs to only 2,500 rpm, against 4,500 rpm on the main spindle, so back-end work on small diameters will run at lower surface speed than the front end.

Bar capacity is 65 mm (2.6 in) as standard, with options for 71 mm (2.8 in), 80 mm (3.1 in) and, on the L spindle only, 90 mm (3.5 in). Larger bores lower main-spindle speed to 3,500 rpm (Ø71 mm option) or 2,500 rpm (Ø80 mmB option). The machine measures 4,529 × 2,670 × 2,615 mm (W × D × H); the NTRX-300L keeps the same 640 mm (25.2 in) diameter and stretches turning length to 1,600 mm (63 in).

Full Specifications

Parameter	Value
Max Turning Diameter	640 mm (25.2 in)
Sub Spindle Speed	2,500 rpm
Sub Spindle Power	15 kW (20 hp)
Milling Spindle Power	15 kW (20 hp)
Chuck Size	8 in, 10 in, (12 in optional), (15 in~ optional)
Upper Tool Capacity	24 tools (40 or 80 optional)
Lower Turret Stations	12 (driven tools at 5,000 RPM)
Max Turning Length	1,100 mm (43.3 in)
Distance Between Spindles	max. 1,350 mm (53.1 in) / min. 250 mm (9.8 in)
Max Bar Capacity	65 mm (2.6 in) (Ø71 mm option: 71 mm (2.8 in); Ø80 mmA option: 80 mm (3.1 in); Ø90 mm option: 90 mm (3.5 in)(Only L))
Max Spindle Speed	4,500 rpm (Ø71 mm option: 3,500 rpm; Ø80 mmB option: 2,500 rpm)
Spindle Motor Power	15 / 11 kW, 22 / 18.5 kW(optional) (Ø80 mmA option: 22 / 18.5 kW(optional))
Floor Space Required	4,529 × 2,670 × 2,615 mm (W × D × H)

Specifications sourced from nakamura-tome.com — verified 2026-10-03

Strengths & Limitations

Strengths

640 mm (25.2 in) turning diameter for large flanges and housings
15 kW (20 hp) milling spindle with 24 tools, or 40 or 80 optional
12-station lower turret with driven tools at 5,000 RPM
Distance between spindles adjustable from 250 mm (9.8 in) to 1,350 mm (53.1 in)
Bar capacity options up to 90 mm (3.5 in) on the L spindle

Limitations

Sub-spindle tops out at 2,500 rpm, slow for small diameters on the second operation
Main spindle rated 15 / 11 kW as standard; 22 / 18.5 kW is an option
Larger bores lower main spindle speed to 3,500 rpm or 2,500 rpm
Standard 24-tool magazine fills quickly on complex parts

Best For

Large-diameter parts up to 640 mm (25.2 in) machined complete Flanges, valve bodies and housings with heavy milling Shafts up to 1,100 mm (43.3 in) long Bar work from 65 mm (2.6 in) up to 90 mm (3.5 in) with options

Frequently Asked Questions

01 How does the NTRX-300 differ from the NTRX-300L?

Length. Both are listed at 640 mm (25.2 in) of turning diameter, the same main-spindle speed of 4,500 rpm and the same 15 / 11 kW power. The NTRX-300 turns 1,100 mm (43.3 in) long; the NTRX-300L turns 1,600 mm (63 in).

02 What tooling does the NTRX-300 have?

An upper milling spindle rated 15 kW (20 hp) with 24 tools as standard and 40 or 80 optional, plus a lower turret with 12 stations and driven tools at 5,000 RPM.

03 How fast is the NTRX-300 sub-spindle?

The sub-spindle runs to 2,500 rpm and is rated 15 kW (20 hp). The main spindle runs to 4,500 rpm. Plan small-diameter finishing on the main side where possible.

04 What chucks and bar sizes does the NTRX-300 take?

Chucks of 8 in and 10 in are listed, with 12 in and 15 in and up as options. Bar capacity is 65 mm (2.6 in) as standard, 71 mm (2.8 in) or 80 mm (3.1 in) with options, and 90 mm (3.5 in) on the L spindle only.