DN Solutions PUMA 4100 LMC

The DN Solutions PUMA 4100 LMC is the heavy-hitter in the 4100 long-bed lineup, sporting a massive 21-inch (533 mm) chuck and 2,432 N-m (1,794 ft-lb) of torque. This is the machine you bring in when you're turning large-diameter, long parts in materials that fight back — think heavy forgings in 4340, large stainless housings, and thick-wall pipe.

The 37 kW (50 hp) spindle drives through a gear train optimized for maximum torque at 1,500 RPM. At 21-inch chuck diameters, 1,500 RPM delivers about 6,300 SFM at the OD — more than enough surface speed for finishing steel. For roughing, where you're pushing deep and feeding hard, the 2,432 N-m of torque means the spindle won't flinch.

The long bed gives you 1,988 mm (78 in) of turning length with a max turning diameter of 550 mm (22 in). Axis travels are 352 mm (14 in) on X and 2,155 mm (85 in) on Z. The 12-station turret with 4,000 RPM live tooling handles cross-drilling and milling features along the full part length.

At 12,050 kg (26,566 lb), this is the heaviest of the 4100 long-bed variants. The extra mass comes from the heavier chuck, gearing, and structural reinforcement needed to support 2,400+ N-m of cutting force. It's all working in your favor — more mass means more rigidity and better vibration damping.

The FANUC 0i-TF Plus control manages the operations. For shops doing heavy industrial turning with parts that need both large chucks and long reach, the PUMA 4100 LMC delivers the torque and work envelope to get it done.