Doosan Puma 3100B

The Doosan Puma 3100B is a 12 in chuck turning center with an A2-8 spindle nose, a 10-station turret and a listed maximum turning diameter of ⌀525 mm (20.7 in) over 760 mm (29.9 in) of length. DN Solutions, which was Doosan Machine Tools until 2022, does not show it in the current lineup, so this page mostly serves someone assessing an existing machine.

Two clearance figures frame the work. The table gives 640 mm (25.2 in) over the bed and 360 mm (14.2 in) over the cross slide. The second matters for shafts: a part that runs the length of the bed has to pass the cross slide, so it is held to 360 mm (14.2 in), well under the ⌀525 mm (20.7 in) that can be turned near the chuck. Bar capacity is 82 mm (3.2 in).

Several rows of the table disagree with each other, and a buyer should settle them from the machine's own plate and manual. Spindle speed appears as 3,500 RPM and as 2800 rpm, and spindle power as 26 kW (34.8 hp) and as 22 kW (30 Hp). X travel is given as 310 mm (12.2 in) and as 293 mm (11.5 in), Z travel as 920 mm (36.2 in) and as 830 mm (32.7 in). Rapids are 20 and 24 m/min (787 and 945 ipm) in one pair of rows and 30 m/min (1181 in/min) on both axes in another. The torque figure, 1123 Nm (828 ft-lbs), stands alone.

The remaining rows are consistent. The turret indexes to the adjacent station in 0.2 sec and takes BMT-KEY shanks and boring bars up to ⌀50 mm (2 in). Live tooling is optional, at 5,000 RPM and 3.7 kW (5 hp). Positioning accuracy is ±0.005 mm (±0.0002 in) and repeatability ±0.002 mm (±0.00008 in). The control is Fanuc 0i-TF as standard, with Siemens 828D as an option. Installation needs 220/380 VAC 3-phase at 70 A and floor space of 4095 × 1978 mm (161 × 78 in) under a 2010 mm (80 in) height; the machine weighs 5850 kg (13000 lbs.) and holds 350 L (92 gal) of coolant.