Okuma LU4000 EX

Est. $230,000 - $350,000 Specs verified 2026-10-03 · okuma.com Updated 2026-10-03

Image: d30jruhmdicmo0.cloudfront.net, Okuma

Key Specifications

Rapid Traverse

25/30 m/min (984/1,181 ipm)

Spindle Power

22/15 [32/22] kW (30/20 [43/30] hp)

Max Turn Length

1,250 mm (49.21 in)

max turning diameter

480 mm (18.90 in)

spindle nose

A2-8 [A2-11]

driven tool speed

4,000 RPM

How much does the Okuma LU4000 EX cost?

Estimated price range

Est.$230,000 - $350,000

Our best estimate for a cnc lathes / turning center in this class — not a quote from Okuma. Configuration moves it a long way.

Overview

The Okuma LU4000 EX is a CNC lathe for shaft-length work: 1,250 mm (49.21 in) of maximum turning length on a 480 mm (18.90 in) turning diameter. The LU3000 EX starts at 350 mm (13.78 in) of turning length and reaches 1,000 mm only as an option. The LU4000 EX lists a single length, and it is the long one.

Power comes in two levels. The standard spindle is 22/15 kW (30/20 hp), the same rating as the LU3000 EX, and Okuma lists 32/22 kW (43/30 hp) in brackets as an option, nearly half as much again. For parts that are both long and close to 480 mm across, the option is worth specifying, because the standard motor is no bigger than the one on the smaller machine.

Driven tools are listed at 4,000 rpm, so cross holes and milled features can be cut in the same setup as the turning. The headline table gives no C-axis or Y-axis row; confirm the milling axes if that work matters. The spindle has an A2-8 nose and runs 42 to 4,200 rpm, with an A2-11 nose and a 30 to 3,000 rpm range as options. Rapid traverse is 25/30 m/min (984/1,181 ipm).

Full Specifications

Parameter	Value
Max Turning Diameter	480 mm (18.90 in)
Max Turning Length	1,250 mm (49.21 in)
Spindle Motor Power	22/15 [32/22] kW (30/20 [43/30] hp)
Spindle Nose	A2-8 [A2-11]
Driven Tool Speed	4,000 RPM
Rapid Traverse Rate	25/30 m/min (984/1,181 ipm)
Spindle Speed	42–4,200 [30–3,000] rpm

Specifications sourced from okuma.com — verified 2026-10-03

Strengths & Limitations

Strengths

1,250 mm (49.21 in) maximum turning length with a 480 mm (18.90 in) turning diameter
Optional 32/22 kW (43/30 hp) spindle above the standard 22/15 kW (30/20 hp)
Driven tools listed at 4,000 rpm for milling and drilling on turned parts
Rapid traverse of 25/30 m/min (984/1,181 ipm), matching the smaller LU3000 EX

Limitations

Standard spindle power is 22/15 kW (30/20 hp), no more than the smaller LU3000 EX; the 32/22 kW rating is an option
Top speed is 4,200 rpm, or 3,000 rpm on the optional range, against 5,000 rpm on the LU3000 EX
Only one turning length is listed; the LU7000 EX is the step up at 2,000 mm (78.74 in)

Best For

Shafts up to 1,250 mm (49.21 in) long and 480 mm (18.90 in) in diameter Turned parts needing cross-drilling or milling with 4,000 rpm driven tools Heavier roughing with the optional 32/22 kW (43/30 hp) spindle

Frequently Asked Questions

01 Does the LU4000 EX have driven tools?

Yes. Okuma lists a driven-tool speed of 4,000 rpm. The headline table does not give driven-tool power, a C-axis rate or a Y axis for this model, so take those from the full specification if milling is a large part of the work.

02 What spindle options does the LU4000 EX have?

Standard is 22/15 kW (30/20 hp) on an A2-8 nose at 42 to 4,200 rpm. The bracketed options are a 32/22 kW (43/30 hp) rating, an A2-11 nose and a 30 to 3,000 rpm range. The table does not say whether those three options come together or separately.

03 What is the largest part the LU4000 EX can turn?

Maximum turning diameter is 480 mm (18.90 in) and maximum turning length is 1,250 mm (49.21 in). For comparison the LU3000 EX lists 410 mm (16.14 in) and up to 1,000 mm (39.37 in), and the LU7000 EX 900 mm (35.43 in) and 2,000 mm (78.74 in).