USED DMG MORI NVGH-6T

The DMG MORI NVGH-6T is a high-performance CNC vertical multi-process grinding machine designed for medium-sized components requiring exceptional precision, rigidity, and productivity. As part of the NVGH series developed by Taiyo Koki under DMG MORI, it represents a high-specification solution that integrates internal (ID), external (OD), and face grinding into a single setup. This capability makes it ideal for industries such as aerospace, automotive, bearing manufacturing, and industrial machinery, where process consolidation and tight tolerances are essential.

The machine features a swing diameter of 650 mm and a maximum grinding diameter of 600 mm, with a maximum workpiece height of 500 mm and grinding length up to 450 mm. It supports workpieces weighing up to approximately 500 kg, positioning it as a robust mid-size solution for precision grinding applications. The work spindle operates at speeds up to 500 rpm, while the grinding spindle can reach up to 10,000 rpm, ensuring stable and efficient machining performance.

A key feature of the NVGH-6T is its high-rigidity design combined with a turret-type wheelhead equipped with two grinding spindles and continuous indexing (B-axis). This allows flexible multi-process operations and precise angular adjustments for complex geometries. The machine also offers optional C-axis functionality with direct drive, enabling extremely fine indexing (0.0001°) for non-round grinding applications such as cams, polygons, and curvic couplings.

Another notable feature is its optional hard-turning capability, where the external grinding spindle can be converted into a turning spindle for efficient material removal, reducing overall cycle time. Automation options such as SCARA robots, automatic pallet changers (APC), and automatic measurement systems further enhance productivity and enable unattended operation.

Overall, the NVGH-6T is a versatile and high-spec grinding center that combines precision, flexibility, and automation, making it an excellent choice for manufacturers handling medium-sized, high-accuracy components.

DMG MORI NVGH-6T SPECIFICATIONS

WHY BUY USED DMG MORI NVGH-6T

Buying a used DMG MORI NVGH-6T is a highly strategic decision for manufacturers seeking advanced vertical grinding capability without the substantial cost of a new machine. One of the primary advantages is cost efficiency. High-spec multi-process grinding machines like the NVGH-6T are expensive when new due to their precision engineering and automation features, but used units offer similar capabilities at a significantly lower investment.

Another important factor is durability and build quality. DMG MORI machines are known for their rigid construction and long service life, and the NVGH-6T is designed with high rigidity to maintain accuracy over extended periods. Because grinding operations involve lower cutting forces compared to milling or turning, structural wear is minimized. This allows even older machines to remain productive and accurate when properly maintained.

Cutting time, or machine hours, is a crucial factor when evaluating a used NVGH-6T. Machines with lower grinding hours typically offer better spindle condition, improved axis accuracy, and longer remaining service life. However, even machines with higher usage can still be a worthwhile investment if they have undergone refurbishment, such as spindle rebuilding, encoder replacement, or CNC upgrades. Maintenance history often plays a more significant role than the manufacturing year alone.

Another advantage is faster availability. Used machines can often be sourced and installed quickly, avoiding the long lead times associated with new equipment. Many used NVGH-6T units also come with tooling, automation systems, or measurement solutions already installed, adding immediate operational value and reducing additional setup costs.

Finally, depreciation works in favor of the buyer. High-end CNC grinding machines lose a significant portion of their value over time while retaining their functional capabilities. This makes a used NVGH-6T 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-6T COST?

The cost of a used DMG MORI NVGH-6T varies depending on factors such as manufacturing year, machine condition, cutting hours, included tooling, and automation features. As a high-spec vertical multi-process grinding machine, it typically falls into the mid-to-high price range in the used CNC grinding market.

For machines manufactured before 2000, prices generally range from $30,000 to $80,000. These machines often have higher cutting hours and may require refurbishment, such as spindle rebuilding, control upgrades, or replacement of feedback systems. 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 $70,000 and $150,000. These units often include improved CNC controls and better automation compatibility. Cutting time becomes a key pricing factor in this category—machines with lower hours or recent refurbishments can command higher prices due to improved reliability and performance.

For newer machines manufactured between 2010 and 2025, prices can range from $150,000 to $320,000 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 remains 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 costs such as installation, tooling, and potential retrofits. Overall, the NVGH-6T represents a strong value proposition, offering advanced grinding capability, automation potential, and long-term reliability in demanding industrial applications.