DN Solutions PUMA DNT 3100M

The DN Solutions PUMA DNT 3100M is the large-format member of the DNT M series, stepping up to a 12-inch chuck and extended turning length for shops processing large-diameter forgings, castings, and bar work in demanding materials. It bridges the gap between mid-size production lathes and full heavy-duty large-bore turning centers, offering driven tooling capability on a machine sized for 500+ mm workpieces.

The main spindle runs an A2-11 nose driven by a 30 kW (40 hp) motor producing 1,592 Nm (1,174 ft-lb) of torque at low RPM, stepping to 3,200 RPM at the high end. That torque figure is substantial — it reflects a machine designed to hog material in large-diameter forgings and castings where cutting forces are high and vibration damping determines whether the machine holds tolerance or starts chattering. Box-way construction throughout provides the foundation for this work.

Axis travels extend to 320 mm (12.6 in) on X and 1,100 mm (43.3 in) on Z, supporting longer shaft and cylinder work without repositioning. Rapids run at 20 m/min on both axes, slower than the lighter DNT models but appropriate for a machine of this mass and the workpiece sizes it handles. The 12-station BMT 65 live-tool turret drives tools at up to 3,000 RPM with 5.5 kW (7.5 hp) for drilling, tapping, and light milling on large turned parts.

The control is FANUC 0i-TF Plus with DN Solutions' iHMI touchscreen as standard, with Siemens 828D available as an option. A programmable tailstock is strongly recommended for the shaft work and longer turning lengths this machine commonly handles.

Pricing runs $150,000-$200,000 new. The DNT 3100M competes with the Okuma LB4000 EX II and the Mazak Quick Turn Nexus 350 II M in this class. Shops that need its capacity typically have no close alternative at the price — stepping up to a true large-bore turning center would double or triple the investment.