USED DMG MORI NVGH-9T

The DMG MORI NVGH-9T is a high-spec CNC vertical multi-process grinding machine designed for precision machining of medium to large components with complex geometries. As part of the NVGH series developed by Taiyo Koki under DMG MORI, it integrates multiple grinding processes—including internal (ID), external (OD), and face grinding—into a single setup, significantly improving efficiency and accuracy. The machine is widely used in industries such as aerospace, automotive, energy, and industrial machinery, where high rigidity and tight tolerances are essential.

The NVGH-9T features a swing diameter of 950 mm and a maximum grinding diameter of 900 mm, with a maximum workpiece height of 700 mm and grinding length of up to 600 mm. It is capable of handling workpieces weighing up to approximately 2,500 kg, making it suitable for heavy-duty precision grinding applications. The work spindle operates at speeds up to 250 rpm, while the grinding spindle can reach up to 6,000 rpm, ensuring stable and efficient machining performance.

A key feature of the NVGH-9T is its high-rigidity design, which minimizes vibration and enhances accuracy during grinding operations. It uses a turret-type wheelhead equipped with a high-rigidity HSK-A125 grinding spindle and continuous indexing (B-axis), enabling precise angular adjustments and flexible multi-process operations. The machine also offers an optional C-axis with direct drive, allowing ultra-fine indexing down to 0.0001°, which enables non-round grinding such as cams, polygons, and curvic couplings.

Additional features include automation compatibility with SCARA robots, automatic pallet changers (APC), and automatic measurement systems, enhancing productivity and enabling unattended operation. An optional hard-turning function allows efficient stock removal, reducing overall cycle time.

Overall, the NVGH-9T is a powerful and versatile grinding center, combining large work capacity, advanced automation, and high precision, making it ideal for demanding industrial applications.

DMG MORI NVGH-9T SPECIFICATIONS

WHY BUY USED DMG MORI NVGH-9T

Buying a used DMG MORI NVGH-9T is a strategic investment for manufacturers seeking high-capacity, high-precision grinding capabilities without the substantial cost of a new machine. One of the primary advantages is cost efficiency. Machines of this size and specification are expensive when new due to their advanced engineering and automation features, but used units can deliver similar performance at a significantly lower price.

Another major advantage is durability. The NVGH-9T is built with high rigidity and robust components, designed to maintain accuracy even when handling heavy workpieces. Because grinding involves relatively low cutting forces compared to milling, structural wear is minimized, allowing older machines to remain productive if properly maintained. This makes the model particularly suitable for long-term use in demanding environments.

Cutting time, or machine hours, is one of the most important factors when evaluating a used NVGH-9T. Machines with lower grinding hours typically offer better spindle condition, improved axis precision, and longer service life. However, even machines with higher usage can still provide good value if they have undergone refurbishment, such as spindle rebuilding, encoder replacement, or CNC control upgrades. Maintenance history is often more critical than the manufacturing year.

Another key benefit is faster availability. Used machines can often be sourced and installed much more quickly than new equipment, which may involve long lead times. Many used NVGH-9T units also come with automation systems, tooling, or measurement equipment already installed, reducing additional setup costs and improving operational readiness.

Depreciation also works in favor of the buyer. High-end grinding machines lose a significant portion of their value over time while retaining their core functionality. This makes a used NVGH-9T an excellent option for companies looking to expand capacity, improve efficiency, or enter high-precision grinding without a large upfront investment.

HOW MUCH DOES A USED DMG MORI NVGH-9T COST?

The cost of a used DMG MORI NVGH-9T varies widely depending on factors such as manufacturing year, machine condition, cutting hours, automation features, and included tooling. As a large-capacity, high-spec vertical grinding machine, it typically falls into the premium segment of the used CNC grinding market.

For machines manufactured before 2000, prices generally range from $40,000 to $100,000. These machines often have high cutting hours and may require refurbishment, such as spindle rebuilding, replacement of feedback systems, or CNC control upgrades. However, they can still be suitable for less demanding applications or lower production volumes if properly maintained.

Machines from the 2000–2010 period typically range between $90,000 and $180,000. These units often include improved CNC controls and early automation features. Cutting time becomes a key pricing factor in this category—machines with lower hours or recent refurbishments tend to command higher prices due to better reliability and performance.

For newer machines manufactured between 2010 and 2025, prices can range from $180,000 to $400,000 or more, especially for units equipped with advanced features such as automatic pallet changers, in-process measurement systems, and low cutting hours. These machines are ideal for high-precision and high-volume production environments where uptime and consistency are critical.

Cutting time is one of the most important determinants of price. A low-hour machine with a strong maintenance record will command a premium, while a high-hour machine may require additional investment in repairs or calibration. Buyers should also consider additional costs such as installation, tooling, and potential retrofits. Overall, the NVGH-9T represents a high-value investment, offering large capacity, advanced functionality, and long-term reliability in precision grinding applications.