DN Solutions PUMA 4100

$150,000 - $250,000 Updated 2026-03-11

Key Specifications

Max Spindle

2,000 RPM (standard); up to 3,000 RPM depending on model

Spindle Power

37 kW (50 hp)

Max Turn Length

1,016 mm (40 in) standard; up to 2,032 mm (80 in) on XL variants

max turning diameter

560 mm (22 in)

chuck size

12" / 15" / 18" / 21" options

bar capacity

102 mm (4 in) standard; 117 mm (4.6 in) on M variant

Overview

The DN Solutions PUMA 4100 is a heavy-duty horizontal turning center built to handle medium to large workpieces with the kind of brute-force cutting capability that smaller lathes simply cannot match. With a maximum turning diameter of 560 mm (22 in), chuck options from 12 to 21 inches, and a 50 HP spindle delivering up to 2,419 ft-lbf of torque through a 2-speed gearbox, this machine is designed for the kind of aggressive roughing and heavy stock removal that oil and gas, energy, and heavy equipment manufacturers demand.

The PUMA 4100 series is built on a box guideway design for maximum rigidity and vibration damping during heavy cuts. This is not a linear guide machine, and that is intentional. When you are burying a 3-inch face mill in 4140 or hogging Inconel sleeves for downhole tools, box ways deliver the stability that linear guides cannot. The servo-driven turret accommodates 12 tools, and the Fanuc control keeps things straightforward for operators who need reliability over bells and whistles.

DN Solutions (formerly Doosan Machine Tools) offers the PUMA 4100 in several variants: the base 4100 for 2-axis turning, the 4100M with live tooling for milling and drilling on the turret, the 4100L and 4100XL for extended turning lengths up to 80 inches, and live-tooling long-bed combinations. Bar capacity on the standard model is 102 mm (4 in), stepping up to 117 mm (4.6 in) on the M variant. Spindle speeds range from 1,500 to 3,000 RPM depending on configuration, with three spindle motor options all running through 2-speed gearboxes for optimal torque across the speed range.

The PUMA 4100 competes with the Okuma LB4000 EX II, Mazak QT-300, and Haas ST-40 in the large-bore horizontal turning segment. Against the Haas, the PUMA offers significantly more torque and a box-way design that outperforms at heavy cutting. Against the Okuma, DN Solutions typically comes in at a lower price point with comparable capability. The PUMA 4100 is a proven platform with a large installed base in job shops and production facilities across North America and Europe.

Full Specifications

Parameter	Value
Max Turning Diameter	560 mm (22 in)
Max Turning Length	1,016 mm (40 in) standard; up to 2,032 mm (80 in) on XL variants
Chuck Size	12" / 15" / 18" / 21" options
Bar Capacity	102 mm (4 in) standard; 117 mm (4.6 in) on M variant
Max Spindle Speed	2,000 RPM (standard); up to 3,000 RPM depending on model
Spindle Motor Power	37 kW (50 hp)
Spindle Torque Max	3,282 Nm (2,419 ft-lbf) with gearbox
Spindle Drive	2-speed gearbox
Turret Stations	12
Turret Type	Servo-driven
Guideway Type	Box guideways
Tailstock	Available (hydraulic programmable)
CNC Control	Fanuc 0i-TF Plus
Live Tooling	Available on M variants (12 stations)
Steady Rest	Available (hydraulic open/close)

Strengths & Limitations

Strengths

50 HP spindle with 2,419 ft-lbf torque through 2-speed gearbox delivers serious heavy-cutting capability in tough materials
Box guideway design provides superior rigidity and vibration damping for aggressive roughing versus linear guide alternatives
Multiple chuck options from 12 to 21 inches and turning lengths up to 80 inches cover a wide range of workpiece sizes
DN Solutions (formerly Doosan) offers competitive pricing against Okuma and Mazak with comparable capability
M variant with live tooling enables milling, drilling, and tapping without secondary operations
Fanuc 0i-TF Plus control is industry standard with a large pool of trained operators
Large installed base in North America with strong dealer network and parts availability

Limitations

Box guideways sacrifice rapid traverse speed compared to linear guide machines, impacting cycle time on light-cutting jobs
Base model tops at 2,000 RPM, which limits surface speed capability on smaller diameter finish work
12-station turret can feel limiting on complex multi-operation parts; no option for sub-spindle on base models
Machine weight and footprint are substantial for the turning capacity, requiring adequate floor space and foundation
DN Solutions brand transition from Doosan can cause confusion in the used market

Best For

Oil and gas manufacturers turning large-diameter downhole tools, couplings, and sleeves in Inconel and 4140 Heavy equipment shops machining large shafts, flanges, and housings in carbon and alloy steels Job shops needing a large-bore lathe that handles 12-21 inch chucks with serious torque for heavy roughing Energy sector manufacturers producing valve bodies, pump components, and turbine shafts Shops upgrading from older large lathes to modern CNC with live tooling capability (M variant) Production environments running medium to large workpieces in batches of 10-500 pieces

Frequently Asked Questions

01 What is the difference between the PUMA 4100 variants?

The base 4100 is a 2-axis turning center with standard bed length. The 4100M adds live tooling with C-axis for milling and drilling on the turret. The 4100L extends turning length to about 60 inches, and the 4100XL reaches 80 inches. The LM and XLM variants combine extended beds with live tooling. All share the same spindle platform and box guideway construction.

02 How does the PUMA 4100 compare to the Haas ST-40?

The PUMA 4100 delivers significantly more spindle torque (2,419 ft-lbf vs roughly 1,650 ft-lbf on the ST-40) and uses box guideways versus the Haas's linear guides. For heavy roughing in tough materials, the PUMA is the stronger machine. The Haas is less expensive and offers faster rapids for lighter cutting work. Choose based on your primary cutting conditions.

03 What chuck sizes does the PUMA 4100 accept?

The PUMA 4100 supports 12, 15, 18, and 21 inch chucks depending on the model variant. The 4100B typically ships with an 18-inch standard chuck. Bar capacity is 102 mm (4 in) on standard models and 117 mm (4.6 in) on the M variant. Verify specific chuck and bar capacity for the exact variant you are quoting.

04 Is DN Solutions the same as Doosan?

Yes. Doosan Machine Tools rebranded to DN Solutions in 2022. The PUMA line, including the 4100, continues under the DN Solutions name with the same engineering, manufacturing, and dealer network. Used Doosan PUMA 4100 machines are identical to DN Solutions machines of the same vintage.