DN Solutions PUMA 4100 XLA

At 3,152 mm (124 in) of maximum turning length, the DN Solutions PUMA 4100 XLA is a three-metre two-axis lathe. It keeps the 12 in chuck and 3,000 rpm spindle of the shorter PUMA 4100 LA and stretches Z travel to 3,180 mm (125 in). Maximum turning diameter is 550 mm (22 in), the spindle is rated 35 kW (47 hp) and 1,584 N·m (1,168 ft-lb), and the turret has 12 stations.

The nearest relative is the PUMA 4100 LA, with identical spindle, chuck and turret figures on 2,155 mm (85 in) of Z and a turning length of 2,124 mm (84 in). Going to the XLA adds about a metre of working length and raises machine weight to 11,900 kg (26,235 lb), against the 10,900 kg (24,030 lb) of the PUMA 4100 LA. The floor requirement grows accordingly, to 7,024 × 2,276 × 2,335 mm (277 × 90 × 92 in) as length, width and height.

A 3,000 rpm spindle on a bed this long points at shafts of moderate diameter: propeller and drive shafts, long rolls, pump shafts, piston rods. On work like that the full 550 mm (22 in) of turning diameter is rarely used, and it is the length, the speed and the 12 tool stations that earn their keep. How the part is supported matters more than any spindle figure. The table gives no tailstock or steady rest data, and a slender three-metre part cannot be held to size on a chuck alone, so the support package is the first thing to specify with DN.

Rapids are 16 m/min (630 ipm) on X and 20 m/min (787 ipm) on Z, with 352 mm (14 in) of X travel. The table has no live-tool speed and no Y travel. For a long part that also needs milling, DN's PUMA 3100 ULY lists 3,125 mm (123 in) of turning length with 130 mm (5 in) of Y travel and 5,000 rpm live tools, on a smaller 420 mm (17 in) turning diameter and 1,123 N·m (828 ft-lb).