Okuma Mill-Turn / Multi-Tasking Machines

Okuma MULTUS U4000

Est. $450,000 - $650,000 Specs verified 2026-10-03 · okuma.com Updated 2026-10-03

Image: d30jruhmdicmo0.cloudfront.net, Okuma

Key Specifications

Tool Capacity

40 tools

Rapid Traverse

Xa/Za 50 m/min (1,968 ipm); Zb/Y 40 m/min (1,574 ipm); Xb 25 m/min (980 ipm)

Spindle Power

22/15 kW (30/20 hp)

spindle speed

45–4,200 rpm

spindle nose

JIS A2-8 [JIS A2-11]

spec extension

W, 2S, 2SW

How much does the Okuma MULTUS U4000 cost?

Estimated price range

Est.$450,000 - $650,000

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

Overview

The Okuma MULTUS U4000 is a multitasking turning centre with a 650 mm (25.59 in) maximum turning diameter, a 45–4,200 rpm spindle on a JIS A2-8 nose and capacity for 40 tools. Okuma lists JIS A2-11 as the optional nose. In the MULTUS U line this is the size where the spindle nose grows while the motor stays the same.

The neighbours show it. The MULTUS U3000 has the same 22/15 kW (30/20 hp) spindle power, the same 40 tools and a 650 mm turning diameter, but a JIS A2-6 nose with JIS A2-8 as its option. The MULTUS U5000 keeps the JIS A2-8 [JIS A2-11] pair and raises spindle power to 37/30 kW (49/40 hp). The U4000 is therefore the pick when a part needs the larger nose and the chuck that goes with it, but not the heavier motor.

Rapid traverse is given axis by axis: 50 m/min (1,968 ipm) on Xa and Za, 40 m/min (1,574 ipm) on Zb and Y, and 25 m/min (980 ipm) on Xb. The a and b suffixes show that the table covers more than one set of slides. Okuma lists W, 2S and 2SW spec extensions for the model without describing them on the product page, so ask for the spindle and axis list of the exact variant quoted.

Okuma's product page carries only these headline rows. Turning length, Y travel, milling spindle figures and machine weight are not on it, and should be taken from the brochure before the machine is matched to a part.

Full Specifications

Parameter	Value
Spindle Speed	45–4,200 rpm
Spindle Nose	JIS A2-8 [JIS A2-11]
Rapid Traverse Rate	Xa/Za 50 m/min (1,968 ipm); Zb/Y 40 m/min (1,574 ipm); Xb 25 m/min (980 ipm)
Tool Capacity	40 tools
Spec Extension	W, 2S, 2SW
Max Turning Diameter	650 mm (25.59 in)
Spindle Motor Power	22/15 kW (30/20 hp)
Rapid Traverse Xa Za	50 m/min (1,968 ipm)
Rapid Traverse Zb Y	40 m/min (1,574 ipm)
Rapid Traverse Xb	25 m/min (980 ipm)

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

Strengths & Limitations

Strengths

JIS A2-8 spindle nose as standard with JIS A2-11 listed as the option, one size above the JIS A2-6 [JIS A2-8] pair of the MULTUS U3000
45–4,200 rpm spindle speed range with 22/15 kW (30/20 hp) of spindle power
Capacity for 40 tools, the same as the MULTUS U3000 and MULTUS U5000
Rapid traverse of 50 m/min (1,968 ipm) on Xa and Za and 40 m/min (1,574 ipm) on Zb and Y
Listed in W, 2S and 2SW spec extensions

Limitations

Spindle power is 22/15 kW (30/20 hp), no higher than the MULTUS U3000; the MULTUS U5000 lists 37/30 kW (49/40 hp)
Xb rapid traverse is 25 m/min (980 ipm), half the 50 m/min (1,968 ipm) of Xa and Za
The JIS A2-11 nose is an option, not part of the standard machine
Okuma's page for this model states no turning length, Y travel or machine weight

Best For

Chucking and shaft parts up to 650 mm (25.59 in) in turning diameter Work that needs a JIS A2-8 nose, or the optional JIS A2-11 Multi-operation parts that draw on a 40-tool capacity Cuts within 22/15 kW (30/20 hp) at up to 4,200 rpm

Frequently Asked Questions

01 What is the difference between the MULTUS U4000 and the MULTUS U3000?

The spindle nose. The MULTUS U4000 has a JIS A2-8 nose with JIS A2-11 as the option, while the MULTUS U3000 has JIS A2-6 with JIS A2-8 as the option. Spindle power is 22/15 kW (30/20 hp) on both, both hold 40 tools, and the rapid traverse rates are the same: 50 m/min (1,968 ipm) on Xa and Za.

02 How does the MULTUS U4000 compare with the MULTUS U5000?

Both have the JIS A2-8 [JIS A2-11] nose pair, a 650 mm (25.59 in) maximum turning diameter and 40 tools. The MULTUS U5000 lists 37/30 kW (49/40 hp) of spindle power against the 22/15 kW (30/20 hp) of the MULTUS U4000, so the choice between them turns on how much metal the job removes per pass.

03 How fast are the axes of the MULTUS U4000?

Okuma lists rapid traverse as 50 m/min (1,968 ipm) on Xa and Za, 40 m/min (1,574 ipm) on Zb and Y, and 25 m/min (980 ipm) on Xb. The slower Xb figure matters when estimating cycle time for work done on that slide.

04 What are the W, 2S and 2SW versions of the MULTUS U4000?

Okuma lists W, 2S and 2SW as spec extensions of the MULTUS U4000. The product page does not describe what each one adds, and the headline figures (45–4,200 rpm, 22/15 kW (30/20 hp), 40 tools) are given for the model as a whole. Ask which spindles and slides each extension carries before comparing quotations.