USED DMG MORI IGV-3NT

The DMG MORI IGV-3NT is a compact, high-precision CNC vertical multi-process grinding machine designed for small components requiring extreme accuracy, high surface finish quality, and stable mass production capability. Developed by Taiyo Koki under DMG MORI, the IGV series focuses on combining internal, external, and face grinding into a single setup to improve productivity and reduce handling errors. The IGV-3NT is widely used in industries such as automotive, bearing manufacturing, hydraulic components, and precision mechanical parts.

The machine features a swing diameter of 300 mm and a maximum grinding diameter of 200 mm, with a maximum workpiece height of 150 mm and grinding length of 150 mm. It is designed for small precision parts and typically handles workpieces requiring high repeatability in mass production environments. The work spindle operates at speeds up to 800 rpm, while the grinding spindle can reach extremely high speeds of up to 75,000 rpm, enabling ultra-fine surface finishes and efficient material removal on small diameters.

A key advantage of the IGV-3NT is its vertical structure, which improves operator handling and machining stability. The workpiece is naturally seated under gravity, reducing clamping distortion and improving roundness accuracy. In optimized conditions, the machine is capable of achieving sub-micron roundness levels using standard test procedures from Taiyo Koki.

The IGV-3NT is equipped with a turret-type wheelhead that supports both internal and external grinding spindles as standard, allowing ID, OD, and face grinding in a single setup. Optional automation systems such as robotic loaders, stockers, and in-process measurement systems further enhance productivity and enable unattended operation. Additional options include multiple spindle speed configurations (30,000 to 75,000 rpm), automatic dressing systems, and advanced chucking solutions for flexible production setups.

Overall, the IGV-3NT is a compact but highly capable grinding machine designed for ultra-precise, high-volume manufacturing of small components.

DMG MORI IGV-3NT SPECIFICATIONS

WHY BUY USED DMG MORI IGV-3NT

Buying a used DMG MORI IGV-3NT is a practical and cost-efficient option for manufacturers needing ultra-precision internal grinding without the high investment required for a new machine. One of the biggest advantages is affordability. New high-speed vertical grinding machines with advanced spindle technology and automation can be expensive, while used units provide similar performance at a significantly lower entry cost.

Another key advantage is reliability. The IGV-3NT is built with a rigid vertical structure that ensures stability during high-speed grinding. Because grinding involves relatively low cutting forces, mechanical wear is generally limited compared to milling or turning machines. This allows well-maintained used machines to continue delivering high precision over long production cycles.

Cutting time (machine hours) is a critical factor when evaluating a used IGV-3NT. Machines with lower grinding hours typically offer better spindle health, improved axis accuracy, and longer remaining service life. However, higher-hour machines can still be a strong investment if they have undergone proper refurbishment, such as spindle rebuilding, bearing replacement, or CNC system upgrades. Maintenance records often provide more value than the machine’s age alone.

Another advantage is fast availability. Used machines are often available immediately or with short lead times, unlike new machines that may require long manufacturing and delivery cycles. Many used IGV-3NT units also include automation systems, measurement devices, or tooling packages, which reduces setup costs and speeds up production readiness.

Depreciation also works strongly in favor of buyers. High-end grinding machines lose significant value over time while retaining core functionality. This makes the IGV-3NT a strong choice for companies expanding precision grinding capacity or entering high-volume production without major capital expenditure.

HOW MUCH DOES A USED DMG MORI IGV-3NT COST?

The cost of a used DMG MORI IGV-3NT depends on manufacturing year, machine condition, cutting hours, spindle wear, and included automation or tooling. As a compact ultra-high-speed internal grinding machine, it generally falls into the lower-to-mid price range of the used CNC grinding market.

For machines manufactured before 2000, prices typically range from $18,000 to $45,000. These machines often have higher cutting hours and may require refurbishment such as spindle rebuilding, bearing replacement, or CNC control upgrades. However, they can still be suitable for low-volume or less demanding precision applications if properly maintained.

Machines from the 2000–2010 period generally range between $40,000 and $85,000. These models often include improved control systems and better spindle performance. At this stage, cutting time becomes an important pricing factor—machines with lower hours or recent maintenance typically command higher prices due to improved reliability and accuracy.

For newer machines manufactured between 2010 and 2025, prices typically range from $85,000 to $170,000 or more, especially if they include automation systems such as robotic loaders, in-process measurement, or upgraded high-speed spindle configurations (up to 75,000 rpm). These machines are well-suited for high-volume precision manufacturing environments requiring consistent quality and uptime.

Cutting time remains one of the most important pricing drivers. Lower-hour machines command a premium due to better spindle condition and reduced maintenance risk, while high-hour machines may require additional servicing or calibration. Buyers should also consider installation, tooling, and automation costs when evaluating total ownership. Overall, the IGV-3NT offers strong value in the used market, delivering ultra-high-speed precision grinding capability at a relatively accessible cost.