Okuma Mill-Turn / Multi-Tasking Machines

Okuma MULTUS B400II

Est. $500,000 - $750,000 Specs verified 2026-10-03 · okuma.com Updated 2026-10-03

Image: d30jruhmdicmo0.cloudfront.net, Okuma

Key Specifications

Rapid Traverse

40 m/min (X, Z)

Spindle Power

VAC 22/15 kW (VAC 30/20 hp)

max turning diameter

710 mm (27.95 in)

main spindle power

30/22 kW (40/30 hp)

spindle nose

JIS A2-8 [JIS A2-11]

rapid traverse xz y

40/26

How much does the Okuma MULTUS B400II cost?

Estimated price range

Est.$500,000 - $750,000

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 B400II is a multitasking turning centre with a 710 mm (27.95 in) maximum turning diameter, a JIS A2-8 spindle nose and a 38–3,800 rpm spindle. Okuma puts a JIS A2-11 nose and a 30–2,800 rpm range in square brackets, its way of marking options.

Two spindle power figures appear on Okuma's page: VAC 22/15 kW (VAC 30/20 hp) and, as main spindle power, 30/22 kW (40/30 hp). The page does not tie either rating to a nose or a speed range, so have the motor named in the quotation before estimating roughing rates.

Rapid traverse is 40 m/min on X and Z and 26 m/min on Y, given together as 40/26 m/min (1,575/1,024 ipm). Against the MULTUS U4000, which has the same JIS A2-8 [JIS A2-11] nose pair, the B400II turns a larger diameter, 710 mm against 650 mm (25.59 in), and moves more slowly: the MULTUS U4000 lists 50 m/min (1,968 ipm) on Xa and Za.

Full Specifications

Parameter	Value
Max Turning Diameter	710 mm (27.95 in)
Main Spindle Power	30/22 kW (40/30 hp)
Spindle Nose	JIS A2-8 [JIS A2-11]
Rapid Traverse Rate	40 m/min (X, Z)
Rapid Traverse Xz Y	40/26
Spindle Motor Power	VAC 22/15 kW (VAC 30/20 hp)
Rapid Traverse X Z Y	40/26 m/min (1,575/1,024 ipm)
Spindle Speed	38–3,800 [30–2,800] rpm

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

Strengths & Limitations

Strengths

710 mm (27.95 in) maximum turning diameter, more than the 650 mm (25.59 in) of the MULTUS U4000
JIS A2-8 spindle nose as standard, with JIS A2-11 listed as the option
38–3,800 rpm spindle speed range in the standard build
40 m/min (1,575 ipm) rapid traverse on X and Z

Limitations

Y-axis rapid traverse is 26 m/min (1,024 ipm), well below the 40 m/min of X and Z
The bracketed optional speed range stops at 2,800 rpm, against 3,800 rpm as standard
Two spindle power ratings are listed without a statement of which configuration each belongs to

Best For

Chucking parts up to 710 mm (27.95 in) in turning diameter Work that calls for a JIS A2-8 nose or the optional JIS A2-11 Turning at up to 3,800 rpm in the standard build

Frequently Asked Questions

01 What spindle power does the MULTUS B400II have?

Okuma's page shows two figures: VAC 22/15 kW (VAC 30/20 hp), and 30/22 kW (40/30 hp) given as main spindle power. It does not say which nose or speed range each belongs to, so ask for the motor rating in writing for the configuration you are quoted.

02 What is the spindle speed range of the MULTUS B400II?

38–3,800 rpm as standard. Okuma lists 30–2,800 rpm in square brackets as the optional range, and also brackets JIS A2-11 as the optional nose to the standard JIS A2-8.

03 How does the MULTUS B400II compare with the MULTUS U4000?

Both have a JIS A2-8 nose with JIS A2-11 as the option. The MULTUS B400II turns 710 mm (27.95 in) where the MULTUS U4000 turns 650 mm (25.59 in). The MULTUS U4000 is quicker in rapid traverse, 50 m/min (1,968 ipm) on Xa and Za against 40 m/min on X and Z for the MULTUS B400II, and it lists a capacity of 40 tools.