Okuma SIMULTURN LU4000EX

What the maker publishes about the current Okuma SIMULTURN LU4000EX

Two turrets cutting at the same time define the Okuma LU4000 EX, a 4-axis turning center for the class that takes 10 to 15 inch chucks. The upper turret is a V12 and the lower one a V8, and both cover large work ranges. It turns parts to a maximum of 18.90 in in diameter and 49.21 in in length. Its standard spindle has an A2-8 nose, spans 42 to 4,200 min⁻¹ and carries a 30/20 hp rating. An alternate spindle specification lists an A2-11 nose, 30 to 3,000 min⁻¹ and 43/30 hp. Rapid traverse is 984/1,181 ipm. The bed is a 45-degree box design, with box ways carrying the carriage and cross slide. Three bearing points hold the spindle. Versions come with milling, with a Y-axis, or with a sub-spindle. The control is the OSP-P500, and an OSP-P300 version is listed as well.

Source: Okuma, September 27, 2026.

What the Okuma SIMULTURN LU4000EX is used for

Okuma uses the LU4000 EX for 4 axis turning in the 10 to 15 inch chuck class, with an upper and a lower turret cutting the same part at once, and it lists milling, a Y axis and a sub spindle as builds of the model.

Source: Okuma America, October 14, 2026.

Okuma SIMULTURN LU4000EX specifications

Figures as currently published; an older unit may differ in control generation and options.

1. manufacturer specification page, fetched October 14, 2026.

Okuma SIMULTURN LU4000EX equipment and options

Options on the 8 Okuma SIMULTURN LU4000EX units we tracked

• Chip conveyor 3 of 8
• Tailstock 3 of 8

What to check on an Okuma SIMULTURN LU4000EX

• Control generation. The manufacturer specifies OSP-P500 for this model. Units we have tracked run 2014 to 2022; an early one may carry an older control or a retrofit.
• Spindle. The manufacturer gives a spindle speed of 42~4,200 [30~3,000] min⁻¹. Run the spindle to top speed and listen for bearing noise.
• Spindle load. The manufacturer gives 22/15 [32/22] kW (30/20 [43/30] hp) of spindle power. Take a heavy cut and watch the load meter.
• Spindle nose. The manufacturer gives a spindle nose of A2-8 [A2-11]. Check that the chuck fitted to it runs true.
• Rapids and ballscrews. The manufacturer gives a rapid traverse of 25/30 m/min (984/1,181 ipm). Measure the backlash on each axis.
• Bed and ways. The manufacturer gives a max turning diameter of Ø480 mm (18.90 in) and a max turning length of 1,250 mm (49.21 in). Check the ways for wear near the chuck.

Okuma SIMULTURN LU4000EX control and manuals

• Control OSP-P500

In a 2024 video, Okuma says its OSP control holds the machine manuals already loaded, so an operator can open them at the machine, and that other PDF files load onto it from a USB drive.

Source: Okuma America, October 24, 2026.

Okuma SIMULTURN LU4000EX listing history

Where it was listed

Filed under CNC Lathes (7) and CNC Turning Centers (1).

Model years seen

2022, 2015 ×4, 2014 ×3.

What Okuma SIMULTURN LU4000EX listings agree on

What affects the value of a used Okuma SIMULTURN LU4000EX

• Control. The manufacturer specifies OSP-P500.
• Build year. The units we tracked were built from 2014 to 2022, across 3 model years, most often 2015 (4 units).
• Against the published figures. The manufacturer gives max spindle speed 42~4,200 [30~3,000] min⁻¹, spindle motor power 22/15 [32/22] kW (30/20 [43/30] hp), max turning diameter Ø480 mm (18.90 in) and max turning length 1,250 mm (49.21 in).

Looking for an Okuma SIMULTURN LU4000EX for sale?

We have tracked 9 Okuma SIMULTURN LU4000EX listings on 4 marketplaces (machinetools.com, revelationmachinery.com, surplusrecord.com and usedcnc.com), model years 2014 to 2022. We buy Okuma SIMULTURN LU4000EX machines and do not sell them.

2022 · 2015 · 2015 · 2015 · 2015 · 2014 · 2014

Every Okuma SIMULTURN LU4000EX we have tracked

1 more listing, no year.

The Okuma SIMULTURN LU4000EX among lathes and turning centers

Browse all CNC Lathes, or see every Okuma machine we track.

Other CNC Lathes models in this directory

1. Okuma LT-2000EX-3T2MY: manufacturer specification page, fetched October 14, 2026.
2. Okuma SIMULTURN LU4000EX: manufacturer specification page, fetched October 14, 2026.
3. Okuma LB-300: archived manufacturer spec sheet (PDF), fetched September 16, 2026.
4. Okuma LB35III: manufacturer specification page, fetched October 14, 2026.