Okuma Mill-Turn / Multi-Tasking Machines

Okuma MULTUS B400

Est. $600,000 – $800,000 Specs verified 2026-03-28 · machinetools.com Updated 2026-10-03

Key Specifications

Max Turn Length

1,259 mm (49.6 in)

max turning diameter

660 mm (26.0 in)

main spindle speed

20 – 3,500 rpm

main spindle motor

22 / 26 kW (30 / 35 HP)

sub spindle speed

20 – 3,500 rpm

milling spindle speed

20 – 10,000 rpm

How much does the Okuma MULTUS B400 cost?

Estimated price range

Est.$600,000 – $800,000

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 B400 is a multitasking lathe with a tilting milling spindle and a sub-spindle. On the listed figures the main spindle and the sub-spindle both run 20 – 3,500 rpm, the milling spindle runs 20 – 10,000 rpm, and the machine weighs approx. 21,000 kg (46,300 lb). Equal speed ranges on the two turning spindles mean a second operation can run at the same cutting data as the first.

The milling spindle swings on a B-axis from –30° to +210° and travels ±125 mm in Y, so it can face either turning spindle and reach features up to 125 mm off the centreline. Rapid traverse is listed as 30 / 30 / 40 m/min in X, Y and Z. The table counts 8 axes, gives a bar capacity of 4" and shows no tailstock, which leaves the sub-spindle as the only support for the far end of a long part.

On the turning envelope the listed table disagrees with itself. It carries two different turning diameters, two machining lengths, two chuck sizes and two power ratings, and none of them is repeated here. Read those from the nameplate and manual of the actual machine. The same goes for the control, which the listing shows as CNC (OSP-200L).

Full Specifications

Parameter	Value
Max Turning Diameter	660 mm (26.0 in)
Max Turning Length	1,259 mm (49.6 in)
Main Spindle Speed	20 – 3,500 rpm
Main Spindle Motor	22 / 26 kW (30 / 35 HP)
Sub Spindle Speed	20 – 3,500 rpm
Milling Spindle Speed	20 – 10,000 rpm
Milling Spindle Motor	22 / 26 kW (30 / 35 HP)
B Axis Range	–30° to +210°
Y Axis Travel	±125 mm
Rapid Traverse X Y Z	30 / 30 / 40 m/min
Chuck Size Main Sub	315 mm / 254 mm
Machine Weight	Approx. 21,000 kg (46,300 lb)
Chuck Size	15"
Bar Capacity	4"
Power	40 hp
Max RPM	10,000 RPM
Turning Dia	27.9"
Swing Over Bed	27.9"
Machining Length	61"
Tailstock	No
CNC Control	CNC (OSP-200L)

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

Strengths & Limitations

Strengths

Milling spindle listed at 20 – 10,000 rpm on a B-axis that swings from –30° to +210°
Sub-spindle listed at the same 20 – 3,500 rpm as the main spindle
±125 mm of Y travel for off-centre milling, drilling and tapping
Listed bar capacity of 4" for bar-fed work
Rapid traverse listed as 30 / 30 / 40 m/min in X, Y and Z

Limitations

No tailstock is listed, so the far end of a shaft can only be held by the sub-spindle
Y travel is ±125 mm; milling further off centre than that is outside the stroke
Turning spindles are listed to 3,500 rpm, a limit on surface speed at small diameters
The listed table gives conflicting values for turning diameter, machining length, chuck size and power, so the envelope has to be confirmed on the machine

Best For

Bar-fed parts within the listed 4" bar capacity Turned parts with angled milled features, done in one clamping Two-sided parts transferred to the 20 – 3,500 rpm sub-spindle Off-centre features within ±125 mm of Y

Frequently Asked Questions

01 What spindle speeds are listed for the MULTUS B400?

The main spindle and the sub-spindle are both listed at 20 – 3,500 rpm. The milling spindle is listed at 20 – 10,000 rpm, and a separate row gives the maximum as 10,000 RPM, which agrees with it.

02 Does the MULTUS B400 have a tailstock?

No. The listed table shows the tailstock as "No" and lists a sub-spindle running 20 – 3,500 rpm, the same range as the main spindle. Long parts are therefore held between the two spindles, and the second end is machined in the sub-spindle.

03 What are the B-axis and Y-axis ranges of the MULTUS B400?

The B-axis range is listed as –30° to +210° and Y travel as ±125 mm. The B range lets the milling spindle work square to the part, at an angle, or toward the sub-spindle side; the Y stroke covers flats, keyways and cross holes up to 125 mm off the centreline.

04 What size of part does the MULTUS B400 take?

The listed table is not a dependable guide on this point: it gives two different values each for turning diameter, machining length and chuck size. What it states without conflict is a 4" bar capacity, ±125 mm of Y travel and no tailstock. For the turning envelope, use the manual or nameplate of the specific machine.