Okuma LU7000 EX

$400,000 - $650,000 Updated 2026-03-13

Key Specifications

Max Spindle

2,000 RPM

Rapid Traverse

15 m/min X, 18 m/min Z

Spindle Power

45/37 kW (60/50 hp)

Max Turn Length

2,000

max turning diameter

Ø900

swing over bed

1,200 mm (47.2 in)

Overview

The Okuma LU7000 EX is Okuma's largest twin-turret horizontal turning center, built for the heaviest industrial turning applications. With a maximum turning diameter of 900 mm (35.4 in) and a swing over bed of 1,200 mm (47.2 in), the LU7000 EX handles workpieces that are beyond the reach of nearly every other production turning center on the market. This is a machine for shops turning large forgings, castings, pipe, and structural components in industries like oil and gas, power generation, shipbuilding, and heavy equipment manufacturing.

The main spindle delivers 45/37 kW (60/50 hp) at up to 2,000 RPM through an A2-15 or larger spindle nose. The 18-inch to 24-inch hydraulic chuck clamps the oversized workpieces this machine was designed for. Bed length options extend from 1,500 mm (59.1 in) to 4,000 mm (157.5 in) for long shaft and pipe work. Bar capacity is 165 mm (6.5 in) on the standard bore.

The upper turret carries 12 stations with optional driven tools, while the lower turret adds 8-10 stations for simultaneous OD operations. The twin-turret architecture reduces cycle times by 25-40% on these large parts, where single-turret cycle times can run 30-60 minutes per piece. At approximately 18,000 kg (39,683 lb), the LU7000 EX has the mass to absorb vibration from aggressive cuts on large, unbalanced workpieces.

Okuma's OSP-P300L control with Thermo-Friendly Concept is essential on a machine this size, where thermal growth from the spindle, bed, and turrets can cause dimensional errors measured in tenths of millimeters. The Collision Avoidance System protects against costly crashes on a machine where replacement parts and repair downtime are extremely expensive.

The LU7000 EX competes with heavy-duty turning centers from Hankook (VTC series), Tacchi (HD series), and Mori Seiki (NL series) in the heavy industrial segment. Few manufacturers offer twin-turret capability at this size, giving the LU7000 EX a competitive advantage for shops needing simultaneous cutting on oversized parts. Specs sourced from Okuma published data.

Full Specifications

Parameter	Value
Max Turning Diameter	Ø900
Max Turning Length	2,000
Swing Over Bed	1,200 mm (47.2 in)
Max Spindle Speed	2,000 RPM
Spindle Motor Power	45/37 kW (60/50 hp)
Spindle Nose	A2-15
Chuck Size	18 in (457 mm) / 21 in (533 mm) / 24 in (610 mm)
Bar Capacity	165 mm (6.5 in)
Upper Turret Stations	12
Lower Turret Stations	8-10
X Axis Travel	480 mm (18.9 in)
Z Axis Travel	1,550 mm (61 in)
Rapid Traverse Rate	15 m/min X, 18 m/min Z
Machine Weight	18,000 kg (39,683 lb)
CNC Control	Okuma OSP-P300L
Speed Range	10~1,500 [8~750, 5~500, 5~350]
Standard Power	45/37 [55/45, 75/60]
Rapid Traverse X Z	20
Okuma Global Repair Center	Charlotte, North Carolina
Inches	Metric
Spindle Nose Type	JIS A2-15 [A2-20, Ø725 flat]

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

Strengths & Limitations

Strengths

900 mm turning diameter and 1,200 mm swing handle the largest industrial workpieces in Okuma's turning lineup
Twin turrets provide simultaneous cutting on workpieces where single-turret cycles run 30-60 minutes
45 kW (60 hp) spindle delivers massive torque for heavy stock removal on large forgings and castings
18,000 kg mass provides exceptional vibration damping for interrupted cuts on large, unbalanced workpieces
Bed lengths up to 4,000 mm handle the longest shaft and pipe work in heavy industry
165 mm bar capacity covers the largest production bar stock applications

Limitations

Starting at $400K, the LU7000 EX is a major capital investment requiring long-term production commitments to justify
2,000 RPM max spindle speed limits surface speed on smaller diameters within the turning range
18,000 kg weight requires reinforced foundations, heavy cranes, and significant floor space
Slow rapids at 15/18 m/min increase non-cutting time, though this is typical for machines in this size class
Finding operators experienced with twin-turret programming on this size machine is challenging

Best For

Oil and gas manufacturers turning large pipe, drill collars, and pressure vessel components Power generation shops producing turbine casings, generator rotors, and large bearing housings Shipbuilding operations turning propeller shafts, rudder stocks, and large marine engine components Mining and heavy equipment manufacturers producing large hydraulic cylinder bodies and pivot pins Steel mill and foundry operations turning large castings and forgings Defense contractors producing large-caliber gun barrels and artillery components

Frequently Asked Questions

01 What does an Okuma LU7000 EX cost?

New LU7000 EX machines run $400,000-$650,000 depending on bed length, chuck size, and configuration. Standard configurations start around $400,000-$480,000. Extended bed setups with maximum options push $550,000-$650,000. Used machines from 2010-2018 sell for $180,000-$320,000 depending on condition and hours.

02 What foundation does the LU7000 EX require?

At 18,000 kg, the LU7000 EX requires a purpose-built reinforced concrete foundation typically 500-800 mm thick, engineered for the specific soil conditions at your facility. Foundation costs typically run $30,000-$60,000. Rigging requires a 40+ ton crane. Plan for 3-4 months of foundation preparation before machine delivery.

03 How long are cycle times on the LU7000 EX?

Cycle times vary enormously based on part size and complexity. Simple large-diameter facing and turning operations may take 10-15 minutes. Complex parts with heavy stock removal, multiple bores, and threading can run 45-90 minutes on a single-turret machine. The twin-turret configuration typically reduces these times by 25-40%, potentially saving 15-30 minutes per part on complex jobs.

04 Can the LU7000 EX handle out-of-balance workpieces?

Yes. The 18,000 kg mass and heavy-duty box way construction absorb vibration from moderately unbalanced castings and forgings. For severely unbalanced workpieces, Okuma recommends reduced spindle speeds during initial roughing passes to bring the part into balance before increasing to production speeds.

05 What maintenance does the LU7000 EX require?

Beyond standard maintenance (daily chip removal, weekly coolant checks, monthly lube and hydraulic levels), the LU7000 EX requires periodic way surface inspection due to the heavy loads on the box ways. Spindle bearing replacement is typically needed every 15,000-20,000 hours. Given the machine's value, most shops maintain a service contract with their Okuma distributor.