Okuma Multus B250II
Key Specifications
Spindle Power
max turning diameter
main spindle nose
rapid traverse xz
rapid traverse y
standard power 30 min cont
How much does the Okuma Multus B250II cost?
Estimated price range
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 B250II is a multitasking mill-turn machine with a maximum turning diameter of 600 mm (23.62 in), a JIS A2-6 main spindle nose and a main spindle that runs 45–5,000 rpm on a 22/15 kW (30/20 hp) motor. The power figure is the 30 min and continuous rating.
Power is what separates it from its neighbours. The MULTUS B200II reaches the same 600 mm (23.62 in) diameter with an 11/7.5 kW (15/10 hp) PREX motor, half the rating, and a faster 50~6,000 min⁻¹ spindle. The MULTUS B300II lists a larger 630 mm (24.80 in) turning diameter but a VAC 15/11 kW (VAC 20/15 hp) motor. On the listed figures the Multus B250II has the strongest main spindle of the three, which makes it the one to look at for steel shafts and chucked parts where the turning cuts set the cycle time.
Axis speeds are 40 m/min (1,575 ipm) in X and Z and 26 m/min (1,024 ipm) in Y, the same 40/26 m/min split the MULTUS B300II lists. The slower Y matters less than it looks, because Y moves on a machine of this type are usually short and most positioning distance is in Z.
The listed rows stop there. Chuck size, work length, tool magazine capacity and the milling spindle are not given for this model, so they need to come from Okuma before the machine is compared with others. The spindle nose at least fixes the chuck mounting: JIS A2-6, the same nose the MULTUS U3000 lists as standard.
Full Specifications
| Parameter | Value |
|---|---|
| Max Turning Diameter | 600 mm (23.62 in) |
| Main Spindle Nose | A2-6 |
| Rapid Traverse Xz | 40 m/min (1,575 ipm) |
| Rapid Traverse Y | 26 m/min (1,023 ipm) |
| Standard Power 30 Min Cont | 22/15 kW (30/20 hp) |
| Rapid Traverse X Z Y | 40/26 m/min (1,575/1,024 ipm) |
| Spindle Nose | JIS A2-6 |
| Spindle Speed | 45–5,000 rpm |
| Spindle Motor Power | 22/15 kW (30/20 hp) |
Specifications sourced from okuma.com — verified 2026-10-03
Strengths & Limitations
Strengths
- 22/15 kW (30/20 hp) main spindle motor at the 30 min and continuous ratings
- Maximum turning diameter of 600 mm (23.62 in)
- 45–5,000 rpm main spindle range on a JIS A2-6 nose
- Rapid traverse of 40 m/min (1,575 ipm) in X and Z
- Twice the listed main motor rating of the MULTUS B200II, which has 11/7.5 kW (15/10 hp) for the same 600 mm diameter
Limitations
- Y-axis rapid is 26 m/min (1,024 ipm), against 40 m/min (1,575 ipm) in X and Z
- Top speed of 5,000 rpm is lower than the 6,000 min⁻¹ of the MULTUS B200II, a limit on small-diameter work
- Chuck size, work length, tool capacity and milling spindle figures are not in the listed rows
Best For
Frequently Asked Questions
01
22/15 kW (30/20 hp), listed as the standard power at the 30 min and continuous ratings. The spindle runs 45–5,000 rpm and has a JIS A2-6 nose.
02
600 mm (23.62 in). Okuma's listed rows for this model do not include work length or chuck size, so the usable part length and the standard chuck need to be confirmed before a part is matched to the machine.
03
X and Z rapid at 40 m/min (1,575 ipm) and Y at 26 m/min. The MULTUS U3000 is quicker, at 50 m/min (1,968 ipm) on its Xa and Za axes and 40 m/min (1,574 ipm) in Y.
04
The MULTUS B300II lists a 630 mm (24.80 in) maximum turning diameter, an 8 in standard chuck, 20 tools and a VAC 15/11 kW (VAC 20/15 hp) spindle motor. The Multus B250II lists 600 mm (23.62 in) and 22/15 kW (30/20 hp). Both have a JIS A2-6 nose as standard, a 45–5,000 rpm range and rapids of 40/26 m/min.
Videos
Okuma America Corporation
OKUMA CORPORATION JAPAN
OKUMA CORPORATION JAPAN
EMEC Machine Tools Inc
Comparisons
More from Okuma
Other Mill-Turn / Multi-Tasking Machines
Mazak INTEGREX i-100S
Spinner TTS52
Mazak INTEGREX AG
Willemin-Macodel 508MT2 X1000
Nakamura-Tome NTY3-150V
