Okuma MA-400HA
Key Specifications
Max Spindle
Spindle Taper
Tool Capacity
Rapid Traverse
Spindle Power
Max Workpiece ⌀
Overview
The Okuma MA-400HA is a 400mm pallet horizontal machining center designed for high-volume production of small to medium aluminum and steel components. With a 500 x 500 x 450 mm axis travel envelope and a high-speed spindle capable of 15,000 RPM, the MA-400HA addresses the need for rapid cycle times in automotive, aerospace, and precision parts manufacturing. The 400mm pallet accommodates workpieces up to 630mm diameter and 800mm tall, covering the vast majority of prismatic parts machined in production cells.
Okuma designed the MA-400HA around the Thermo-Friendly Concept, engineering the column, spindle head, and base as a symmetrical structure so that thermal growth is predictable and dimensionally self-compensating. The result is repeatable positional accuracy across long production shifts without chiller-dependent coolant systems or extended warmup programs. The OSP-P300MA control provides full 4-axis simultaneous interpolation as standard, with optional 5-axis support through the B-axis trunnion or rotary table packages.
The machine's 60-tool magazine supports complex part families and high-mix production where tool changes are frequent. Rapid traverse of 60 m/min on all linear axes dramatically reduces non-cutting time compared to older HMC designs, keeping cycle times competitive for pallet-pool automated cells. The twin-pallet APC (Automatic Pallet Changer) allows setup of the next workpiece while the current part is in the machining envelope, approaching continuous spindle utilization in well-programmed production environments.
The MA-400HA competes with the Mazak HCN-4000, DMG Mori NHX 4000, and Makino a40 in the 400mm HMC segment. For shops running high-volume production of small prismatic parts with a focus on cycle time and uptime, the MA-400HA's combination of thermal stability, high rapids, and OSP control make it a strong contender. New machine pricing typically ranges from $400,000 to $600,000 depending on tooling and pallet pool configuration. Specs sourced from Okuma Corporation published data.
Full Specifications
| Parameter | Value |
|---|---|
| Pallet Size | 400 x 400 mm (15.7 x 15.7 in) |
| X Y Z Travel | 500 x 500 x 450 mm (19.7 x 19.7 x 17.7 in) |
| Max Spindle Speed | 15,000 RPM |
| Spindle Taper | CAT 40 |
| Spindle Motor Power | 26/18.5 kW (10 min/continuous) (35/25 hp) |
| Tool Capacity | 60 tools (standard) |
| Rapid Traverse Rate | 60/60/60 m/min (X/Y/Z) |
| Max Pallet Load | 400 kg (882 lb) |
| Max Workpiece Diameter | 630 mm (24.8 in) |
| Max Workpiece Height | 800 mm (31.5 in) |
| CNC Control | Okuma OSP-P300MA |
| Pallet Changer | 2-pallet APC standard |
| Thermo Friendly Concept | Standard |
| Machine Weight | Approx. 16,000 kg (35,274 lb) |
| Axis Travel X | 1,020 mm |
| Axis Travel Y | 760 mm |
| Axis Travel Z | 760 mm |
| Spindle Maximum Speed | 6,000 |
| Manufacturer | Okuma |
| Model | MA-400HA |
Specifications sourced from machinio.com — verified 2026-03-28
Strengths & Limitations
Strengths
- 15,000 RPM BBT40 spindle with 60 m/min rapids delivers aggressive cycle times for high-volume aluminum and steel production
- Thermo-Friendly Concept provides consistent dimensional accuracy across full production shifts without chiller dependence or warmup programs
- 60-tool magazine accommodates complex part families and reduces setup change frequency in high-mix environments
- Twin-pallet APC allows continuous spindle utilization by loading the next workpiece while the current part is being machined
Limitations
- 400mm pallet limits the machine to small and medium workpieces — shops with larger prismatic parts will need a 500 or 630mm class HMC
- Premium Okuma pricing positions the MA-400HA above Korean and Taiwanese HMC alternatives, requiring justification through uptime and accuracy performance
- 60-tool arm-type ATC adds machine footprint and cost compared to 40-tool configurations sufficient for simpler production
Best For
Frequently Asked Questions
01
The MA-400HA is optimized for high-speed production with 15,000 RPM spindle and 60 m/min rapids, targeting high-volume cycle time performance. The MB-4000H is Okuma's premium 400mm HMC with higher rigidity, broader spindle torque range, and more advanced thermal compensation for precision and heavy-material applications. The MA-400HA prioritizes speed; the MB-4000H prioritizes precision and heavy cutting.
02
Yes. The MA-400HA is designed for pallet pool integration using Okuma's Flexible Manufacturing System architecture. Multiple MA-400HA machines can share a common pallet pool rail system with centralized loading station. The OSP-P300MA control includes FMS communication interfaces for scheduling and monitoring from cell controllers. Okuma and third-party system integrators offer turnkey pallet pool solutions based on the MA-400HA platform.
03
The standard 15,000 RPM spindle is well-suited for aluminum at high surface speeds. For hardened steel, die steel, and titanium applications where torque at lower RPM is more important than peak speed, the lower-speed high-torque spindle option provides better material removal rates. Okuma's sales engineers can recommend the optimal spindle specification based on the primary workpiece material and operation type.
04
The twin-pallet APC allows an operator to unload completed parts and load new raw stock on Pallet 2 while Pallet 1 is being machined. Pallet exchange takes approximately 10 seconds. In production environments with cycle times of 5 to 30 minutes, this effectively eliminates load/unload time from the critical path, increasing spindle utilization from 70-80% to over 90% in well-organized cells.
05
Standard MA-400HA configurations typically have lead times of 16 to 26 weeks from order confirmation. Machines with pallet pool systems, extended tool magazines, or special spindle options may require additional lead time. Okuma's North American distributor network supports installation, application engineering, and training for new installations.
Videos
Practical Machinist
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PRIMEMACHINERY
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Community Discussions
Troubleshooting and problem-solving — Okuma MA-400H. Coolant off, please. - Practical Machinist
Pricing and buying discussion — Mori Seiki vs Okuma - Practical Machinist
Troubleshooting and problem-solving — Good place to send a 15K Okuma HMC spindle for a rebuild?
Troubleshooting and problem-solving — Coolant Pump Blues - What is the best replacement option?
Troubleshooting and problem-solving — Problem MA-400HA ALARM 1151-02 ALARM-A #13 - cnczone.com
Community discussion — MA-400HA Tool Changing Question - cnczone.com
Troubleshooting and problem-solving — Need Help! OKUMA MA-400HA - CNCzone
Troubleshooting and problem-solving — Need Help! Rotating table will not clamp. - CNCzone
Capabilities and material handling — Okuma...Love or Hate? : r/Machinists - Reddit
Pricing and buying discussion — What are your experience with okuma machines? :
Comparison and buying advice — OKUMA MA40-HA supply voltage flutter errors. Anyone ... - RedditWhat does everyone see as the most trusted CNC ... - RedditHelping the boss spend money : r/Machinists - RedditMatsuura vs. Okuma? : r/Machinists - RedditAs promised. My shops 1985 Okuma. : r/Machinists -
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Links to community discussions. Summaries are editorial — visit the original thread for full context.
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