Okuma MB-5000HII

$300,000 - $450,000 Updated 2026-03-13

Key Specifications

Max Spindle

min⁻¹ (rpm)

Spindle Taper

No. 40 (No. 50 optional)

Tool Capacity

48 tools

Rapid Traverse

Spindle Power

pallet size

500 x 500 mm (19.7 x 19.7 in)

Overview

The Okuma MB-5000HII is Okuma's flagship 500mm horizontal machining center, marketed as the world's fastest class in the 500mm HMC segment. Built on Okuma's box-way platform with 500 x 500 mm pallets supporting workpieces up to 800 mm diameter by 1,000 mm height, the MB-5000HII combines the vibration damping advantages of box-way construction with acceleration rates of 1.0G on X and Z and 1.1G on Y that typically only linear-guide machines achieve.

The standard 15,000 RPM No. 40 spindle delivers 26 kW (35 hp) at 10-minute rating and 18.5 kW (25 hp) continuous with 199 Nm (146 Nm continuous) of torque. A No. 50 spindle option is available for shops needing heavier cutting capability. Tool storage holds 48 tools standard with maximum tool weight of 4 kg for standard ATC and 15 kg for the No. 50 variant. Machine dimensions are 2,540 x 5,620 x 2,893 mm.

The MB-5000HII's claim to world's fastest class comes from its combination of high acceleration rates on a box-way platform. Most box-way machines sacrifice speed for rigidity, and most high-acceleration machines use linear guides. The MB-5000HII achieves both through Okuma's proprietary servo technology and machine structure design. The machine runs on Okuma's OSP control with Thermo-Friendly Concept, Anti-Crash System, and the full intelligent technology suite.

The MB-5000HII competes directly with the Mazak HCN-5000, DMG Mori NHX 5000, and Makino a51nx in the 500mm HMC class. It is one of the most popular Okuma HMCs globally and serves as the natural competitor to the Mazak HCN-5000 in head-to-head evaluations. New MB-5000HII machines price in the $300,000 to $450,000 range. Specs sourced from Okuma Corporation published data.

Full Specifications

Parameter	Value
Pallet Size	500 x 500 mm (19.7 x 19.7 in)
Max Workpiece Size	ø800 x 1,000 mm (ø31.5 x 39.4 in)
Max Spindle Speed	min⁻¹ (rpm)
Spindle Taper	No. 40 (No. 50 optional)
Spindle Motor Power	35
Spindle Torque	199/146 Nm (5 min/continuous)
Acceleration	X: 1.0G; Y: 1.1G; Z: 1.0G
Tool Capacity	48 tools
Max Tool Weight	4 kg (standard ATC); 15 kg (No. 50 option)
Guideway Type	Box ways (all axes)
CNC Control	Okuma OSP-P500M
Machine Dimensions	2,540 x 5,620 x 2,893 mm (100.0 x 221.3 x 113.9 in) (W x D x H)
Thermo Friendly Concept	Standard
Anti Crash System	Standard
Pallet System	Dual pallet changer standard
Max Machining Volume	760 x 760 x 810
Rotary Pallet Size	500 x 500
Rapid Traverse Xyz	2,362
Spindle Power Hi Winding	26
Rapid Traverse Rate	60
Okuma Global Repair Center	Charlotte, North Carolina
Inches	Metric
Spindle Speed	50 ~ 15,000
Magazine Capacity	48

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

Strengths & Limitations

Strengths

Box-way construction with 1.0-1.1G acceleration achieves a rare combination of rigidity-based surface finish quality and high-speed positioning typically seen only on linear-guide machines
World's fastest class claim in 500mm HMCs is backed by competitive acceleration rates that reduce non-cutting time in production environments
199 Nm spindle torque at 15,000 RPM provides both speed for aluminum and cutting force for steel across mixed-material production
Box-way vibration damping delivers measurably better surface finish than linear-guide competitors under equivalent cutting conditions
Thermo-Friendly Concept maintains accuracy across production shifts without manual thermal compensation adjustments
Direct competitor to the Mazak HCN-5000 with Okuma's single-source control advantage and box-way rigidity edge

Limitations

Box-way maintenance requirements including lubrication system monitoring add to ongoing maintenance burden compared to sealed linear-guide systems
48-tool standard magazine is smaller than the Mazak HCN-5000's scalable 40-348 range, limiting high-mix production flexibility
No. 40 taper standard limits heavy roughing capability — shops cutting predominantly hard materials should specify the No. 50 option
Okuma's OSP control platform, while excellent, has fewer third-party support resources than Fanuc-based alternatives

Best For

Production shops running mixed steel and aluminum parts where box-way rigidity improves surface finish without sacrificing cycle time Automotive component manufacturers needing fast cycle times with consistent accuracy across multi-shift production runs Job shops evaluating 500mm HMCs where the MB-5000HII's box-way advantage over linear-guide competitors provides measurable quality improvements Shops upgrading from vertical to horizontal machining who want a proven, widely-deployed 500mm platform Aerospace manufacturers machining aluminum and steel fittings where surface finish quality and dimensional consistency are critical acceptance criteria Production cells where the MB-5000HII's fast acceleration and pallet changing maximize spindle utilization

Frequently Asked Questions

01 What does a new Okuma MB-5000HII cost?

New MB-5000HII machines typically price between $300,000 and $450,000 depending on spindle selection (No. 40 vs No. 50), tool magazine size, and automation options. Multi-pallet automation, high-pressure coolant, through-spindle coolant, and probing systems add to the base price. Used MB-5000H series machines from 2010-2020 trade between $100,000 and $250,000.

02 How does the MB-5000HII compare to the Mazak HCN-5000?

These are the two most common 500mm HMCs compared head-to-head. The MB-5000HII has box-way construction for better vibration damping and surface finish. The HCN-5000 has linear guides for potentially faster rapids and easier maintenance. The Mazak offers deeper tool magazine scaling (up to 348) and PALLETECH automation. The Okuma offers Thermo-Friendly Concept. Both are excellent machines — the choice often comes down to box-way vs linear-guide preference and control/service network considerations.

03 What makes the MB-5000HII 'world's fastest class'?

Okuma claims world's fastest class based on the 1.0-1.1G acceleration rates achieved on a box-way platform. Most box-way machines have significantly lower acceleration (0.3-0.6G typical) due to the friction and mass of box-way slides. The MB-5000HII's ability to achieve linear-guide-class acceleration while maintaining box-way rigidity advantages is the basis for the claim.

04 Should I choose the No. 40 or No. 50 spindle?

The No. 40 spindle at 15,000 RPM is the better choice for shops running predominantly aluminum and mixed-material work where speed matters. The No. 50 option provides more rigidity and cutting force for shops primarily machining steel and cast iron. Most shops choose the No. 40 as it covers the widest range of applications. The No. 50 is specifically for heavy-duty ferrous material production.

05 How does the MB-5000HII differ from the MA-500HII?

The MB-5000HII is a high-speed No. 40 machine (15,000 RPM, box ways, 1.0G acceleration) optimized for fast cycle times across mixed materials. The MA-500HII is a heavy-duty No. 50 machine (6,000 RPM) optimized for maximum rigidity and cutting force in steel and cast iron. Choose the MB for speed and versatility, the MA for heavy cutting capability.