Okuma MB-5000HII

$378,000 - $500,000 Updated 2026-03-10

Key Specifications

X Travel

760 mm (29.9 in)

Y Travel

760 mm (29.9 in)

Z Travel

810 mm (31.9 in)

Max Spindle

15,000 RPM (12,000 or 20,000 RPM optional)

Spindle Taper

No. 40 (No. 50 optional with 12,000 RPM spindle)

Tool Capacity

48 tools (up to 340 with wine rack magazine)

Overview

The Okuma MB-5000HII is a production-grade horizontal machining center built for shops that need high spindle utilization and fast cycle times on 500mm pallets. Okuma redesigned the II generation with a 20% smaller footprint than its predecessor while boosting throughput by up to 25% through faster axis acceleration and shorter tool changes.

You get 760 x 760 x 810 mm (29.9 x 29.9 x 31.9 in) of travel on a 500 x 500 mm (19.7 x 19.7 in) pallet, which is a generous work envelope for a 500mm-class HMC at roughly 468 million cubic mm. The standard spindle runs at 15,000 RPM with 26 kW (35 hp) on a No. 40 taper, and all three axes accelerate above 1G. That's seriously fast repositioning, and it keeps the spindle cutting instead of air-traveling.

Tool changes are where this machine really separates itself. The 0.9-second tool-to-tool time (tools under 4 kg) with the standard 48-tool disk ATC means you're not burning cycle time swapping cutters. Heavier tools bump that to 1.3 seconds. Options scale up to 340 tools with the matrix-style wine rack magazine if you're running high-mix work across both pallets.

Okuma's Thermo-Friendly Concept handles thermal compensation through temperature swings without manual intervention. It's one of the reasons production shops trust these machines for tight-tolerance work on long unattended runs. Current-production MB-5000HIIs ship with the OSP-P500 control, Okuma's latest CNC platform with a 15" or 21.5" display. The Collision Avoidance System (CAS) runs real-time 3D simulation to prevent crashes during setup and prove-outs.

Direct competitors include the Makino A51nx (faster spindle options, higher price tag), Mazak HCN-5000 (similar capability class), and DMG Mori NHX 5000 (wider option range). Forum users consistently note the MB-5000HII is lighter than Okuma's own MA-5000H by about 4 tons, positioning it firmly as a high-speed aluminum and non-ferrous workhorse rather than a heavy-iron hog. It's roughly half the price of a Makino A61. New machines start around $378K, with used MB-5000H units from 2011-2020 trading between $50K and $290K depending on hours and configuration. Specs sourced from Okuma published data and the Okuma Japan product catalog.

Full Specifications

Parameter	Value
X-Axis Travel	760 mm (29.9 in)
Y-Axis Travel	760 mm (29.9 in)
Z-Axis Travel	810 mm (31.9 in)
Max Spindle Speed	15,000 RPM (12,000 or 20,000 RPM optional)
Spindle Taper	No. 40 (No. 50 optional with 12,000 RPM spindle)
Spindle Motor Power	26 kW (35 hp) standard; 30 kW (40 hp) or 33 kW (44 hp) optional
Spindle Torque	199 N-m (147 ft-lb) standard; 302 N-m (223 ft-lb) with power spindle
Tool Capacity	48 tools (up to 340 with wine rack magazine)
Tool Change Time	0.9 sec tool-to-tool (under 4 kg); 1.3 sec (over 4 kg)
Pallet Size	500 x 500 mm (19.7 x 19.7 in)
Max Workpiece Size	Dia. 800 x 1,000 mm (Dia. 31.5 x 39.4 in)
Max Work Weight	500 kg (1,100 lb)
Rapid Traverse Rate	60 m/min (2,362 ipm)
Axis Acceleration	X: 1.0G, Y: 1.1G, Z: 1.0G
Table Indexing	0.001° increment, full 4th axis (90° index: 1.0 sec, 180°: 1.2 sec)
Machine Weight	11,476 kg (25,300 lb)
Machine Footprint	2,540 x 5,620 x 2,893 mm (100.0 x 221.3 x 113.9 in) W x D x H
CNC Control	Okuma OSP-P500 (OSP-P300MA on pre-2024 units)
Positioning Accuracy	±0.002 mm (±0.0001 in)
Repeatability	±0.001 mm (±0.00004 in)
Okuma Global Repair Center	Charlotte, North Carolina

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

Strengths & Limitations

Strengths

60 m/min (2,362 ipm) rapids with 1.0G+ acceleration on all axes keep non-cutting time to a minimum, directly improving cycle times on complex multi-feature parts
0.9-second tool-to-tool time is among the fastest in the 500mm HMC class, beating most competitors on tool-heavy jobs with frequent cutter swaps
Thermo-Friendly Concept delivers industry-leading thermal stability for tight-tolerance production without constant manual compensation across temperature swings
48-tool standard ATC scales to 340 tools with the wine rack magazine for high-mix production, though the 48 or 64-tool drum configs are faster and more reliable
20% smaller footprint than the predecessor (2,540 x 5,620 mm floor space) puts production HMC capability into shops with limited real estate
PALLETACE multi-pallet automation integration allows scaling from 2-pallet to full FMS without swapping the base machine
OSP-P500 control on current-production units includes Collision Avoidance System, Machining Navi, and a 21.5" display option for easier program management

Limitations

At roughly 11,500 kg (25,300 lb), it's about 4 tons lighter than the MA-5000H, which limits heavy cutting force in steel and cast iron compared to heavier-frame competitors like the Makino A51nx
Wine rack matrix tool changer is a third-party integration; forum users consistently report it's slower than the drum ATC and can have reliability issues with tool staging between pallets
OSP control has a learning curve for shops coming from Fanuc or Siemens, and finding experienced OSP programmers can be harder in some regions
CAT 40 taper limits heavy roughing capability compared to CAT 50 options on larger HMCs like Okuma's own MA-5000H
500 kg (1,100 lb) max work weight restricts fixture complexity for heavy steel tombstone setups that heavier HMCs handle without issue

Best For

High-volume aluminum and non-ferrous component production where the 20,000 RPM spindle option and fast rapids maximize material removal rates Aerospace shops running structural aluminum parts that benefit from 1G+ acceleration and thermal stability across long unattended cycles Job shops adding their first horizontal machining capability with plans to scale into PALLETACE multi-pallet automation Lights-out production cells running two-pallet tombstone setups with automatic tool management on 48 to 64-tool drum ATCs Shops producing complex parts with 50+ tools per program that need deep ATC capacity without sacrificing floor space Production environments prioritizing thermal stability and cycle time reduction over raw cutting force in hard metals

Frequently Asked Questions

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

Base price starts around $378,000 from Okuma distributors. Configured with expanded ATC, high-pressure coolant, probing, and the OSP-P500 control upgrade, expect $425,000-$500,000+. Used MB-5000H machines from 2011-2020 sell for $50,000-$290,000 depending on condition, spindle hours, and ATC configuration. It's roughly half the price of a comparably equipped Makino A61.

02 How does the MB-5000HII compare to the Makino A51nx?

The A51nx has a faster spindle option (14,000 RPM standard) and is built heavier, giving it an edge in rigidity and surface finish. The MB-5000HII counters with better thermal stability across long runs and easier scalability to multi-pallet FMS through PALLETACE. Both are strong 500mm HMCs. The Makino typically costs 10-15% more configured and has a heavier frame that handles ferrous materials better.

03 Should I get the disk ATC or wine rack magazine?

Go with the 48 or 64-tool disk ATC unless you genuinely need 100+ tools accessible without manual loading. The drum is faster and more reliable. Forum users with the wine rack consistently report it's slower, the third-party integration has staging issues between pallets, and Makino and Toyoda have better matrix changer implementations.

04 Is the MB-5000HII good for cutting steel?

It can cut steel, but it's optimized for high-speed aluminum and non-ferrous work. At 11,500 kg, it's about 4 tons lighter than the MA-5000H and lacks the frame mass for aggressive hogging in hardened steel. For mixed ferrous/non-ferrous production, consider the No. 50 taper spindle option at 12,000 RPM with 33 kW (44 hp) and 302 N-m of torque.

05 What control does the MB-5000HII use?

Current-production MB-5000HIIs ship with the OSP-P500, Okuma's latest CNC platform featuring a 15" or 21.5" panel display. Older units run the OSP-P300MA. Both handle conversational programming and full G-code. The Collision Avoidance System (CAS) runs real-time 3D simulation to prevent crashes. If you're used to Fanuc, expect a day or two to get comfortable with Okuma's interface.

06 Can it run unattended?

It's built for it. The two-pallet changer lets you load one pallet while the other runs. Add PALLETACE for 6+ pallets and you can run full shifts unattended. Tool life management, tool breakage detection, and the Collision Avoidance System all support lights-out operation. The 90-degree table index completes in 1.0 second, keeping pallet-swap dead time short.