Okuma MULTUS B300II

$350,000 - $550,000 Updated 2026-03-13

Key Specifications

Y Travel

160 mm (6.3 in)

Tool Capacity

20 tools

chuck size

8 in (standard)

max machining diameter

630 mm (24.8 in)

max work length

900 mm (35.4 in)

main spindle speed

5,000 RPM

Overview

The Okuma MULTUS B300II is a multitasking turning and milling center that combines CNC lathe capability with a full milling spindle on a B-axis for simultaneous multi-axis machining. With a standard 8-inch chuck, maximum machining diameter of 630 mm, and maximum work length of 900 mm, the MULTUS B300II handles a wide range of shaft, bar, and chucking work that benefits from completing turning, milling, drilling, and gear cutting operations in a single setup.

The main turning spindle runs at 5,000 RPM with 15 kW (20 hp) at 20-minute rating and 11 kW (15 hp) continuous. Y-axis travel of 160 mm enables off-center milling, drilling, and tapping operations that a standard turning center cannot perform. The milling spindle on the B-axis provides full contouring capability for complex prismatic features, gear forms, and angular features on turned parts.

Tool storage holds 20 tools standard, which is adequate for many multitasking operations but can be limiting for complex parts requiring many different tool types. Machine dimensions are 4,035 x 2,257 x 2,587 mm — compact for a multitasking machine with this level of capability. An opposing spindle option is available for complete part machining (front and back operations in a single cycle).

The MULTUS B300II is notable for its gear cutting capability, enabling production of highly accurate gears without dedicated gear cutting machines. The machine runs on Okuma's OSP control with Thermo-Friendly Concept, Anti-Crash System, and the full intelligent technology suite.

The MULTUS B300II competes with the Mazak INTEGREX i-200, DMG Mori NTX 2000, and Doosan SMX 2600 in the medium-class multitasking segment. Okuma differentiates with the gear cutting capability and the single-source control integration. New MULTUS B300II machines price in the $350,000 to $550,000 range. Specs sourced from Okuma Corporation published data.

Full Specifications

Parameter	Value
Chuck Size	8 in (standard)
Max Machining Diameter	630 mm (24.8 in)
Max Work Length	900 mm (35.4 in)
Main Spindle Speed	5,000 RPM
Main Spindle Power	15/11 kW (20 min/continuous) (20/15 hp)
Y-Axis Travel	160 mm (6.3 in)
Tool Capacity	20 tools
Machining Type	Turning + Milling + Gear Cutting (multitasking)
Opposing Spindle	Available as option
CNC Control	Okuma OSP-P500M
Machine Dimensions	4,035 x 2,257 x 2,587 mm (158.9 x 88.9 x 101.9 in) (W x D x H)
Thermo Friendly Concept	Standard
Anti Crash System	Standard
Process Navi	Standard
Servo Navi	Standard
Max Turning Diameter	Ø630
Speed Range	45~5,000 [38~3,800]
Standard Power	VAC 15/11
Rapid Traverse Xz Y	40/26
Okuma Global Repair Center	Charlotte, North Carolina
Inches	Metric
Spindle Nose Type	JIS A2-6 [JIS A2-8]

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

Strengths & Limitations

Strengths

Complete part machining in a single setup — turning, milling, drilling, tapping, and gear cutting — eliminates multiple machine transfers and associated setup errors
Gear cutting capability produces highly accurate gears without dedicated hobbing or shaping machines, saving capital for shops with moderate gear production needs
Y-axis milling enables off-center features like flats, keyways, cross-holes, and hex shapes that standard turning centers cannot machine
630 mm machining diameter and 900 mm work length cover a broad range of shaft, bar, and chucking work in a single platform
Optional opposing spindle enables front-and-back machining in a single cycle for true done-in-one production
Compact 4,035 x 2,257 mm footprint delivers multitasking capability without excessive floor space requirements
Thermo-Friendly Concept maintains accuracy during extended multitasking cycles where thermal effects from combined turning and milling operations compound

Limitations

20-tool magazine is limited for complex multitasking operations requiring many turning, milling, and drilling tools simultaneously
5,000 RPM main spindle speed is moderate — high-speed turning applications may require a dedicated turning center
15 kW spindle power constrains heavy roughing capability compared to dedicated lathes with 22-30 kW in this diameter class
B-axis and Y-axis complexity adds maintenance requirements compared to simpler turning centers or machining centers
Programming complexity for simultaneous multi-axis operations requires skilled programmers and CAM software with multitasking capability

Best For

Aerospace shops machining complex shaft and fitting components requiring both turning and milling features in tight-tolerance single setups Job shops consolidating lathe and machining center operations to reduce work-in-progress and floor space while improving accuracy Gear manufacturers needing integrated gear cutting capability without investing in dedicated hobbing or shaping machines Medical device manufacturers producing surgical instruments, bone screws, and implant components with complex turned and milled features Automotive manufacturers machining drive shafts, gear blanks, and transmission components requiring complete machining in one setup Shops transitioning from separate turning and milling operations to done-in-one multitasking for reduced lead times

Frequently Asked Questions

01 What does a new Okuma MULTUS B300II cost?

New MULTUS B300II machines typically price between $350,000 and $550,000 depending on the opposing spindle option, Y-axis configuration, and tool magazine size. The opposing spindle adds approximately $50,000-$80,000. High-pressure coolant, bar feeders, and parts catchers are common additions. Used MULTUS B300 series machines from 2012-2020 trade between $120,000 and $300,000.

02 How does the MULTUS B300II compare to the Mazak INTEGREX i-200?

Both are strong medium-class multitasking machines. The MULTUS B300II offers gear cutting capability and Okuma's single-source control integration. The INTEGREX i-200 typically offers more spindle power and speed options with the MAZATROL SmoothAi control. Both machines produce excellent results for done-in-one manufacturing. The choice often comes down to control preference (OSP vs MAZATROL), service network, and specific feature requirements like gear cutting.

03 Can the MULTUS B300II cut gears?

Yes, the MULTUS B300II can produce spur gears, helical gears, bevel gears, and worm gears using synchronized B-axis and C-axis motion with appropriate cutting tools. The accuracy is sufficient for many industrial gear applications, though it does not replace dedicated hobbing machines for high-volume gear production. For shops producing moderate quantities of gears as part of assemblies, the integrated gear cutting capability eliminates the need for a separate gear cutting machine.

04 What CAM software works with the MULTUS B300II?

Major CAM systems with multitasking capability support the MULTUS B300II, including Mastercam Mill-Turn, ESPRIT, GibbsCAM, and Siemens NX. The Okuma OSP control also supports conversational programming for simpler operations. For gear cutting, Okuma provides dedicated cycles in the OSP control. Choose a CAM system with strong multi-axis simulation capability to verify complex operations before cutting metal.

05 Is the opposing spindle worth the cost?

The opposing spindle is worth it for shops producing complete parts that require machining on both ends. Without it, parts must be removed, flipped, and rechucked for back-end operations — introducing runout errors and adding setup time. For shaft-type parts with features on both ends, the opposing spindle typically pays for itself through reduced cycle time, improved accuracy, and elimination of a second setup operation.