Puma DNT Series Mill-Turn Centers for Enhanced Accuracy

DN Solutions’ Puma DNT 2600LM. Photo Credit: DN Solutions

DN Solutions’ (formerly Doosan Machine Tools) Puma DNT 2100 and 2600 are replacing the PUMA GT 2100 and 2600 models to offer enhanced rigidity, usability and accuracy in horizontal turning. It is designed for single-setup efficiency and accuracy.

“The GT Series has been an international bestseller for a long time,” says Andy McNamara, vice president of sales and marketing at DN Solutions America. “But we never stop looking for ways to upgrade our products and improve the machining experience of our customers.” 

The company says the Puma DNT Series is equipped with the most powerful spindle in its class, a redesigned turret body and live tool drive that guarantee powerful and precise machining, and exceptional productivity. The design of the new machines focuses on convenient operation and easy maintenance.

The upgrades on the DNT Series include features that separate it from its GT predecessors by way of enhanced rigidity, usability and accuracy. 

Like the GT Series, box guideways are applied to all axes on the DNT Series to prevent vibration, ensure dynamic rigidity and deliver powerful and precise machining during heavy duty cutting. Rigidity enhancements on the DNT Series consist of an improved bed design, which includes increased guideway span and saddle width, a higher rigidity bearing arrangement in the main spindle and adoption of a high-rigidity, low-temperature live tool drive.

Convenience features on the DNT Series include an ergonomic control panel with adjustable height iHMI touchscreen for quick and easy operation, a wider maintenance space and the addition of an inverter type chip converter with a 45-degree incline cover design for better chip handling. 

The Puma DNT Series improves on machining accuracy by optimizing the spindle structure and adopting the thermal compensation function which is optional. A low heat generation bearing in the new live tool drive also helps minimize thermal deformation. 

The DNT Series comes in a 2-axis and a milling version. Both have a 25-hp (18.6 kW) or 35-hp (26.1 kW) motor that turns the spindle at speeds ranging from 3,500 to 4,500 rpm. 

Chuck sizes are also common to both configurations with a range of 8 to 12 inches in diameter.

The maximum turning diameter of the 2-axis models is 15.7" (398.8 mm) to 18.1" (460 mm) and the maximum turning length is 21.6" (549 mm) to 42.4" (1077 mm). The milling versions come with a maximum turning diameter of 12.6" (320 mm) to 14.7" (373 mm). The maximum turning length is 19.7" (500 mm) to 40.5" (1,029 mm). The BMT-55 live tooling turret has speed of 6,000 rpm powered by a 7.5-hp (5.6 kW) motor.

Options that add to the versatility of the DNT Series include a high torque spindle, servo tailstock, servo automatic door and others. For light automation, a parts conveyor and various bar feeders are offered.