Nakamura-Tome JX-250

$550,000 - $850,000 Updated 2026-03-19

Key Specifications

Max Spindle

4,500min-1*3

Max Turn Length

1,650mm

max turning diameter

320mm

main spindle speed

4,500 RPM (3,500 / 2,500 depending on bar capacity)

main spindle power

18.5/15 kW (25/20 HP) (22/18.5 kW optional)

bar capacity

65mm

Overview

The Nakamura-Tome JX-250 is the larger-capacity member of Nakamura-Tome's JX series ATC multitasking machines, extending turning length to 1,650 mm and stepping up to 8-inch standard chucks (10 and 12-inch optional, 15-inch available) for medium to large complex workpieces. The JX-250 is built for shops machining substantial components that demand complete turning, milling, and drilling in a single setup with automatic tool changing.

The main spindle delivers 18.5/15 kW at up to 4,500 RPM through a 65 mm bar capacity (71, 80, or 90 mm optional), with spindle speeds adjustable down to 3,500 RPM (80 mm bar) or 2,500 RPM (90 mm bar) to accommodate larger bar stock. The B-axis tool spindle swivels through a 240-degree range (+/-120 degrees) for compound-angle drilling, milling, and contouring operations. The milling spindle provides 5.5/3.7 kW at up to 6,000 RPM with a 250 mm square stroke in the X-Y plane.

The 40-tool ATC magazine (80 or 120 optional) handles complex parts without mid-program tool loading. The distance between spindles extends to 1,850 mm, accommodating long shaft-type workpieces common in oil and gas, aerospace, and heavy equipment manufacturing. Chuck options up to 15 inches confirm this machine's focus on larger workpiece capability.

The machine footprint of 5,579 mm wide by 3,258 mm deep with a 2,954 mm height reflects the JX-250's substantial capability. The left and right Z-axis cross-over travel of 490 mm (right) and 140 mm (left) provides flexibility for simultaneous operations and part transfer. For shops machining medium to large complex components that currently require multiple machines and setups, the JX-250 consolidates the entire process into a single automated platform.

Full Specifications

Parameter	Value
Max Turning Diameter	320mm
Max Turning Length	1,650mm
Main Spindle Speed	4,500 RPM (3,500 / 2,500 depending on bar capacity)
Main Spindle Power	18.5/15 kW (25/20 HP) (22/18.5 kW optional)
Bar Capacity	65mm
Chuck Size	8″,10″,(12″2),(15″2)
B Axis Range	240 degrees (+/-120 degrees)
Milling Spindle Power	5.5/3.7 kW (7.4/5.0 HP)
Milling Spindle Speed	6,000 RPM
Xy Plane Stroke	250 mm square
Distance Between Spindles	max.1,850mm/min.300mm
Lr Z Crossover Travel	R: 490 mm, L: 140 mm
Atc Magazine	40 tools (80 / 120 optional)
Machine Height	2,954 mm (116.3 in)
Machine Width	5,579 mm (219.6 in)
Machine Depth	3,258 mm (128.3 in)
Max Spindle Speed	4,500min-1*3
Floor Space	height:2,954mm / width:5,578.5mmm / depth:3,257.7mm
Standard	φ65(A2-6) 18.5/15kW
Op	φ90(A2-8) 22/18.5kW*2

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

Strengths & Limitations

Strengths

1,650 mm turning length handles long shaft components for aerospace, oil and gas, and heavy equipment applications
B-axis with 240-degree swivel range enables complex compound-angle drilling and milling operations
Chuck options up to 15 inches accommodate large-diameter workpieces beyond typical multitasking machine capacity
Bar capacity up to 90 mm supports large-diameter bar-fed production for continuous automation
Up to 120-tool ATC eliminates mid-program tool loading on the most complex multi-feature parts
1,850 mm distance between spindles handles long workpieces with simultaneous both-end operations

Limitations

$550,000-$850,000 price range demands complex high-value parts to justify the capital investment
5,579 mm width and 3,258 mm depth require substantial floor space allocation
5.5/3.7 kW milling spindle is relatively modest for heavy milling on tough aerospace materials
Nakamura-Tome dealer network is smaller than Mazak or DMG Mori in most Western markets

Best For

Aerospace manufacturing of long, complex shaft components with multi-axis features and angled holes Oil and gas industry production of downhole tools, valve bodies, and manifold components Heavy equipment manufacturing of complex components requiring turning lengths over 1,000 mm Contract shops bidding large complex parts that currently require multiple machine setups Production of large-diameter bar-fed parts up to 90 mm requiring complete multitasking operations

Frequently Asked Questions

01 What does a Nakamura-Tome JX-250 cost?

New Nakamura-Tome JX-250 machines price between $550,000 and $850,000 depending on spindle configuration, ATC capacity, chuck size, and bar capacity options. Standard configurations typically fall in the $600,000-$750,000 range.

02 How does the JX-250 compare to the JX-200?

The JX-250 extends turning length to 1,650 mm (vs 1,058 mm), increases spindle-to-spindle distance to 1,850 mm (vs 1,250 mm), upgrades main spindle power to 18.5/15 kW, and offers chuck sizes up to 15 inches. The JX-250 is the larger-capacity platform for longer and heavier workpieces.

03 What is the B-axis used for on the JX-250?

The B-axis swivels the milling spindle through 240 degrees (+/-120 degrees), enabling angled hole drilling, compound-angle milling, gear hobbing-style operations, and contoured surface machining. This capability is essential for aerospace and medical components with complex multi-angle features.

04 Can the JX-250 handle 15-inch chuck work?

Yes, with the optional 15-inch chuck configuration. This expands the machine capability to large-diameter parts like flanges, ring components, and heavy valve bodies that require multitasking operations in a single setup.