Used Okuma MA-600HII Horizontal Machining Center
| Specifications | Technical Details |
| Stock Number | 810192 |
| Brand | Okuma |
| Model | MA-600HII |
| Origin | Japan |
| CNC System | Okuma OSP-P300MA |
| Table Size | 630*630mm |
| Travel (X/Y/Z) | 1000*900*1000mm |
| Spindle Taper | BT50 |
| Spindle Speed | 6,000 rpm |
| ATC Capacity | 285/60 Tools (Optional High Capacity) |
| Configuration | High pressure center flushing, Indexing resolution of 0.001deg,With a glass scale |
1. Equipment Overview: The Legacy of Okuma MA-600HII
The Okuma MA-600HII stands as a benchmark in the world of Horizontal Machining Centers (HMC). Designed for reliability, speed, and precision, this Japanese-built powerhouse is engineered to handle the most demanding manufacturing challenges. As a member of the MA-HII series, it embodies Okuma’s "Thermo-Friendly Concept," which allows the machine to maintain extreme accuracy despite changes in ambient shop temperatures. This makes it a preferred choice for industries where micron-level tolerances are non-negotiable over long production cycles.
Our featured unit, stock number 810192, is a testament to Okuma's philosophy of "Mechatronics"—the seamless integration of mechanical excellence and advanced electronic control. The Okuma MA-600HII is built on a heavy-duty cast iron bed that provides superior damping characteristics, essential for heavy metal removal and high-speed finishing. For machine shops looking to upgrade their capabilities without the lead time and expense of a brand-new machine, this used Okuma MA-600HII offers a turnkey solution for high-end production.
2. Technical Specifications Analysis: Power Meets Precision
The core of the Okuma MA-600HII is its impressive work envelope. With travels of 1000mm in X, 900mm in Y, and 1000mm in Z, it provides a balanced cubic workspace that can accommodate large workpieces. The dual 630x630mm pallets allow for simultaneous machining and setup, significantly boosting throughput. The B-axis features 0.001-degree indexing, enabling complex multi-sided machining with a single setup, which is critical for maintaining geometric relationships between features on complex parts.
The spindle is a BT50 taper, running up to 6,000 RPM. This configuration is optimized for high torque, making it ideal for heavy-duty milling in materials like titanium, stainless steel, and cast iron. Unlike smaller BT40 machines, the BT50 interface provides the rigidity required to push large diameter face mills and boring bars to their limits. Furthermore, the inclusion of Coolant Through Spindle (CTS) ensures that heat is managed at the cutting edge and chips are flushed out of deep cavities, preventing tool breakage and ensuring a superior surface finish.
Control-wise, the OSP-P300MA is one of the most respected CNC systems in the industry. Known for its open architecture and user-friendly interface, it allows for seamless integration with CAD/CAM software and shop-floor networks. The presence of linear scales on this specific machine further elevates its performance, providing direct feedback of the machine's position to the control, bypassing the inherent errors of ball screw thermal expansion.
3. Application Scenarios: Where the Okuma MA-600HII Excels
In the aerospace sector, the Okuma MA-600HII is frequently used for machining structural components and engine mounts. These parts often require significant material removal from solid billets. The BT50 spindle’s stability ensures that the vibration levels remain low even during high-load roughing operations. In the energy sector, specifically for oil and gas components, the large Z-axis travel and high-pressure CTS are indispensable for drilling deep, precise holes in tough alloys.
The automotive industry also benefits greatly from the Okuma MA-600HII’s pallet changing system. For the production of engine blocks and transmission cases, the ability to swap pallets in seconds means the spindle is almost always cutting. The 0.001-degree B-axis indexing ensures that bearing bores and mating surfaces are machined with perfect alignment, reducing the need for secondary operations and improving the overall quality of the drivetrain components.
4. Maintenance History and Machine Health
This specific Okuma MA-600HII (Stock #810192) has been meticulously maintained throughout its service life. Regular inspections of the OSP control's diagnostic logs show a history of stable operation without critical drive or spindle failures. The linear scales have been checked for cleanliness and signal integrity, ensuring that the machine still holds its original positioning accuracy. The automatic tool changer (ATC) cycle remains crisp, and the pallet exchange mechanism operates smoothly without hesitation. By purchasing a machine with such a solid maintenance pedigree, users can expect a much lower total cost of ownership compared to poorly maintained alternatives.
5. The Value Proposition: Why Buy Used Okuma?
Investing in a used Okuma MA-600HII is a strategic move for any growing machine shop. The primary advantage is the significantly reduced capital expenditure compared to a new machine, which can cost several hundred thousand dollars. However, unlike lower-tier brands, an Okuma machine retains its precision for decades. This means the "used" machine you are buying today still possesses more rigidity and accuracy than many new mid-range machines. With the added value of expensive options like the BT50 spindle, OSP-P300MA control, and linear scales, the return on investment (ROI) is achieved much faster. This machine allows you to bid on high-precision contracts that were previously out of reach, providing a platform for business growth and technical excellence.
FAQ: Frequently Asked Questions
Q1: What is the advantage of the OSP-P300MA over other controllers?
A: The OSP-P300MA is an "intelligent" control that integrates the machine and the software perfectly. It features an easy-to-use touch screen and the Collision Avoidance System (CAS), which can simulate the machining process in real-time to prevent costly crashes.
Q2: Is the BT50 spindle too slow for aluminum machining?
A: While 6,000 RPM is slower than some high-speed BT40 spindles, the BT50's torque allows for much larger cutters. You can achieve high metal removal rates in aluminum by using larger diameter tools and deeper cuts, which often results in faster cycle times than high-speed light cutting.
Q3: Can this machine be integrated into an automated cell?
A: Yes, Okuma machines are designed for automation. The Okuma MA-600HII can be easily integrated with robotic loaders or a Palletace system for lights-out manufacturing.
Q4: What are the power requirements for this machine?
A: Typically, the Okuma MA-600HII requires a 3-phase 200/220V supply. We recommend a dedicated transformer and a stable power source to protect the sensitive OSP electronics.
Q5: Are spare parts readily available for this older model?
A: Absolutely. Okuma has one of the best service networks in the world. Since the MA-HII series is so popular, parts for the spindle, drives, and OSP system are stocked globally, ensuring minimal downtime.
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