USED OKUMA GP/GA-44FII

The Okuma GP/GA-44FII is a high-capacity CNC cylindrical grinding machine designed for precision external grinding of medium-to-large components, particularly long shaft-type parts. As part of Okuma’s GP/GA-FII series, this model is engineered to deliver a combination of rigidity, accuracy, and flexibility, making it suitable for industries such as automotive, aerospace, energy, and heavy engineering. The machine is available in both plain head (GP) and angle head (GA) configurations, allowing it to handle a wide range of grinding applications including straight, tapered, and form grinding.

The GP/GA-44FII supports a maximum grinding diameter of approximately 400 mm and offers multiple distance-between-centers configurations ranging from 350 mm up to 1,500 mm. This flexibility allows it to process both shorter components and long shafts in a single platform. The machine uses a grinding wheel of around 455 mm diameter powered by a 7.5 kW spindle motor, providing stable and accurate grinding performance across a wide range of materials.

A key feature of the GP/GA-44FII is its rigid machine construction. The wide V-flat guideway system enhances stability and reduces vibration, while the hydrodynamic wheel spindle ensures high rotational accuracy during grinding operations. These features are particularly important when machining larger or longer parts where consistency over extended grinding cycles is critical.

The machine is equipped with Okuma’s OSP-P300GA control system, which includes IGAP+ conversational programming for simplified setup and operation. It supports a wide range of grinding processes such as plunge, traverse, multi-plunge, and form grinding.

With rapid traverse speeds of approximately 16 m/min, the GP/GA-44FII minimizes non-productive time and maximizes grinding (cutting) time utilization. Overall, it offers a strong balance of capacity, precision, and productivity for demanding cylindrical grinding applications.

OKUMA GP/GA-44FII SPECIFICATIONS

WHY BUY USED OKUMA GP/GA-44FII

Buying a used Okuma GP/GA-44FII is a strategic choice for manufacturers seeking large-capacity cylindrical grinding capabilities at a significantly reduced investment. Machines in this class are built with heavy-duty construction and precision components, allowing them to maintain accuracy and performance over long operational periods when properly maintained.

One of the biggest advantages of purchasing used is cost efficiency. New CNC cylindrical grinders with this level of capacity and flexibility require substantial capital investment. A used GP/GA-44FII provides access to the same large work envelope, high precision grinding, and process flexibility at a fraction of the original cost, making it especially attractive for mid-sized manufacturers or expanding production facilities.

Grinding time (spindle hours) is one of the most important factors when evaluating a used machine. Machines with lower grinding hours typically retain better spindle condition and guideway accuracy. For example, a machine from the early 2010s with moderate grinding time may deliver more reliable performance than a newer unit that has been heavily used in continuous production. Since this model is often used for long shaft grinding, wear on guideways and steady-rest areas should be carefully inspected.

Another advantage is versatility. The GP/GA-44FII can perform multiple grinding operations—including plunge, traverse, taper, and form grinding—within a single setup. Even in a used condition, this capability can significantly reduce setup times and improve workflow efficiency. Additionally, Okuma’s continued support and parts availability help minimize risks associated with older equipment.

From a financial standpoint, buying used allows for faster return on investment. With lower upfront costs and the ability to sustain long grinding cycles, a used GP/GA-44FII can quickly contribute to production output and profitability.

HOW MUCH DOES A USED OKUMA GP/GA-44FII COST?

The cost of a used Okuma GP/GA-44FII varies depending on manufacturing year, machine condition, configuration, and most importantly, grinding time (spindle hours). As a larger and higher-capacity cylindrical grinder, it generally commands higher prices than smaller models like the GP/GA-26W or GP/GA-34FII.

Machines built before 2000 (or earlier-generation grinders comparable to this platform) typically range from $15,000 to $45,000. These machines are the most affordable but may include older control systems and higher wear levels. Grinding time is critical in this category—machines with high spindle hours may require reconditioning, while low-hour units can still be suitable for lighter production applications.

Models produced between 2000 and 2010 generally range from $45,000 to $110,000. This segment often provides the best balance between price and performance, offering improved controls, better spindle technology, and enhanced rigidity. Units with low to moderate grinding time are particularly desirable, as they can deliver reliable accuracy with manageable maintenance costs.

Machines from 2010 to 2025 typically range from $110,000 to $250,000 or more, depending on configuration, automation integration, and control upgrades. These newer machines benefit from advanced CNC systems, improved efficiency, and better consistency during long production runs.

Grinding time remains the most critical pricing factor. A newer machine with excessive spindle hours may be less valuable than an older machine with minimal use. Buyers should carefully evaluate spindle condition, guideway wear, and maintenance history to determine true market value and ensure long-term operational reliability.