USED DMG MORI TGN 30/80

The DMG MORI TGN 30/80 is a high-precision CNC thread grinding machine designed for medium to large workpieces requiring exceptional accuracy and surface finish. As part of the TGN series, it is engineered for industries such as aerospace, automotive, tooling, and precision engineering, where complex threads like ball screws, worm shafts, and thread gauges must meet extremely tight tolerances. The machine stands out due to its extended capacity, offering a distance between centers of 800 mm and a maximum grinding thread length of approximately 750 mm, making it significantly more capable than smaller models like the 30/30.

The TGN 30/80 supports a maximum grinding diameter of around 150 mm and can handle workpieces weighing up to 80 kg, positioning it as a versatile solution for longer and heavier components. It is equipped with advanced CNC control, typically FANUC, enabling precise control over helix angles and thread profiles through programmable inputs. One of its defining features is the numerically controlled swivel wheelhead, which allows easy adjustment of thread geometry without complex mechanical changes.

Accuracy is a core strength of this machine. It uses a closed-loop positional feedback system with optical scales on linear axes and a high-resolution rotary encoder on the work spindle, ensuring extremely fine control over positioning and thread pitch. This minimizes deviations and guarantees consistent results across production runs. Additionally, the integrated grinding spindle reduces vibration, which is crucial for maintaining surface finish and dimensional stability, especially when working on long shafts.

The machine is also designed for operator convenience and maintenance efficiency. Features such as easy access to the grinding wheel and dresser, along with ergonomic machine layout, reduce downtime during tool changes and servicing. Overall, the TGN 30/80 is ideal for manufacturers needing high-precision thread grinding for longer components, combining capacity, accuracy, and operational efficiency in a single platform.

DMG MORI TGN 30/80 SPECIFICATIONS

WHY BUY USED DMG MORI TGN 30/80

Purchasing a used DMG MORI TGN 30/80 is a practical and cost-effective solution for companies that require high-precision thread grinding capabilities without investing in a new, high-cost machine. One of the primary advantages is the significant reduction in capital expenditure. New CNC thread grinding machines of this class can be extremely expensive due to their precision engineering and specialized functionality, while used machines often retain the same core performance at a fraction of the price.

Another key factor is durability. DMG MORI machines are known for their robust construction and long operational life. The TGN 30/80, in particular, is built with high rigidity to maintain accuracy over extended use. Because thread grinding involves relatively low cutting forces compared to milling or turning, structural wear tends to be lower, allowing even older machines to maintain acceptable performance if properly maintained.

Cutting time, or machine hours, plays a crucial role in determining the value of a used unit. Machines with lower grinding hours typically offer better spindle condition, axis accuracy, and overall reliability. However, even machines with higher usage can still be worthwhile if they have undergone refurbishment, such as replacement of encoders, spindle rebuilds, or CNC control upgrades. For a machine like the TGN 30/80, maintenance history often matters more than age alone.

Another advantage is availability. Used machines can often be sourced and installed much faster than new ones, which may involve long lead times. Many used units also come with additional tooling, fixtures, or software enhancements, adding immediate operational value.

Finally, depreciation benefits the buyer. High-end CNC grinding machines lose value significantly over time, but their functional capabilities remain largely intact. This makes a used TGN 30/80 an excellent option for manufacturers looking to expand capacity, enter precision grinding, or handle specialized long-thread applications without overextending their budget.

HOW MUCH DOES A USED DMG MORI TGN 30/80 COST?

The cost of a used DMG MORI TGN 30/80 depends heavily on factors such as year of manufacture, cutting hours, machine condition, and any upgrades or retrofits. Because this model is larger and more capable than the TGN 30/30, it typically commands higher prices in the secondary market. While exact listings vary, general pricing trends for high-precision CNC grinding machines provide a reliable benchmark.

For machines manufactured before 2000, prices generally fall between $30,000 and $70,000. These machines often have high cutting hours and may require refurbishment, such as spindle rebuilding, replacement of feedback systems, or control upgrades. However, they can still be viable for less demanding applications or lower production volumes if properly maintained.

Machines from the 2000–2010 period typically range from $60,000 to $120,000. These models often include improved CNC controls and better feedback systems, making them more reliable and accurate. Cutting time becomes a key differentiator in this category, with lower-hour machines or recently refurbished units reaching the higher end of the price range.

For newer machines manufactured between 2010 and 2025, prices can range from $120,000 to $220,000 or more. These machines usually have lower cutting hours, better accuracy retention, and may include modern CNC features or automation capabilities. They are ideal for high-precision and high-volume production environments where downtime must be minimized.

Cutting time is one of the most critical pricing factors. A low-hour machine with proper maintenance can command a premium, while a high-hour machine may require additional investment in repairs or calibration. Buyers should also factor in costs for installation, tooling, and potential upgrades. Overall, the price of a used TGN 30/80 reflects its advanced capabilities, extended capacity, and long-term value in precision thread grinding applications.