DN Solutions PUMA 4100L
Key Specifications
Spindle Power
Max Turn Length
max swing over bed
max turning diameter
max bar capacity
spindle speed range
Overview
The DN Solutions PUMA 4100L is an extra-large capacity CNC turning center built for the heaviest turning applications in the energy, defense, and heavy manufacturing sectors. The 4100 series designation reflects this machine's exceptional swing capacity and bed length — accommodating chuck work up to 1,000 mm (39.4 in) in diameter and shaft work up to 4,000 mm (157.5 in) in length. The L suffix indicates the long-bed configuration optimized for shaft, roll, and cylinder turning of workpieces that smaller machines simply cannot accommodate.
The headstock delivers up to 45 kW (60 hp) with spindle torque exceeding 5,000 Nm at low speeds, providing the raw power necessary to remove substantial stock from large-diameter forgings and castings in a single heat. The spindle speed range starts as low as 3 RPM for very large, heavy workpieces and extends to 1,000 RPM for finishing cuts at smaller effective diameters. An A2-15 or D1-15 spindle nose accommodates 18-inch and 24-inch chucks, and four-jaw independent chucks are commonly used for non-round workpieces like pump casings and eccentric flanges.
Steady rests and follow rests are essential companions for shaft work on the PUMA 4100L, supporting long workpieces at multiple points along their length to prevent deflection during heavy cuts. These accessories are factory-integrated with the CNC, allowing programmable steady rest positioning and automatic quill pressure control. The programmable tailstock with MT6 taper provides powerful center support for the heaviest shaft applications.
At this machine scale, the PUMA 4100L competes against Niles-Simmons, TOS Trens, and Tacchi large-format lathes rather than the mainstream CNC lathe market. DN Solutions' advantage is competitive pricing relative to these large-machine specialists while maintaining the quality and control integration of a modern CNC turning center. The PUMA 4100L is a configured-to-order machine with pricing typically ranging from $500,000 to $900,000 depending on bed length, accessories, and work support equipment.
Full Specifications
| Parameter | Value |
|---|---|
| Max Swing Over Bed | 1,000 mm (39.4 in) |
| Max Turning Diameter | 800 mm (31.5 in) over cross slide |
| Max Turning Length | 4,000 mm (157.5 in) |
| Max Bar Capacity | 130 mm (5.12 in) |
| Spindle Speed Range | 3 - 1,000 RPM |
| Spindle Motor Power | 45 kW (60 hp) |
| Spindle Torque | 5,000+ Nm (3,688+ ft-lb) |
| Spindle Nose | A2-15 / D1-15 |
| Turret Stations | 8 or 12 stations (live tooling optional) |
| Tailstock | Programmable, MT6 center taper |
| Steady Rests | CNC-integrated programmable steady rests (multiple) |
| Rapid Traverse Z | 12 m/min (472 ipm) |
| CNC Control | Fanuc 32i-B |
| Machine Weight | 35,000 kg (77,162 lb) approx. |
Strengths & Limitations
Strengths
- 4,000 mm turning length with 1,000 mm swing accommodates workpieces — like long shafts, rolls, and large cylinders — that the vast majority of CNC lathes cannot physically fit
- 5,000+ Nm spindle torque enables heavy roughing at 3 RPM for the largest diameter forgings without stalling the headstock, a capability reserved for machines of this class
- CNC-integrated programmable steady rests and tailstock allow full shaft-turning programs to run without operator intervention at each steady rest repositioning
- DN Solutions' pricing is substantially more competitive than European and North American large-machine specialists for equivalent specifications
Limitations
- Machine weight of approximately 35,000 kg requires a dedicated reinforced concrete foundation pit — installation is a major civil engineering and rigging project
- At this machine scale, operators and programmers need heavy-turning experience that is distinct from typical CNC lathe operation — chip management, tooling deflection, and vibration control are critical skills
- Long lead times (6-18 months) are typical for configured-to-order machines of this size and complexity
Best For
Frequently Asked Questions
01
A 4,100L installation requires a reinforced concrete foundation designed to the machine's specific load and vibration specifications. DN Solutions provides foundation drawings that the buyer's facility engineer uses to design the foundation pit. Typical foundation depth is 600-1,000 mm with reinforced concrete and anchor bolt provisions. Leveling and grouting after installation requires precision alignment work by DN Solutions' service engineers.
02
At this machine scale, overhead cranes are the standard workpiece loading method. The PUMA 4100L is typically installed in facilities with 10-25 ton overhead cranes. Some installations include gantry loaders for semi-automated loading of consistent-weight workpieces. Chip management requires conveyor systems to handle the large volume of chips generated during heavy roughing operations.
03
The base PUMA 4100L is a turning center. Live tooling on the turret is available as an option for drilling, tapping, and milling at C-axis positions. However, the primary application for the 4100L is pure turning — the scale and torque focus of this machine is on material removal, not multi-axis milling. Shops needing extensive milling on large parts typically use separate horizontal boring mills or vertical machining centers.
04
The PUMA 3100M is a large production turning center with milling capability, 800 mm swing, and 1,651 mm turning length targeting oil and gas, heavy equipment, and general heavy-duty production. The PUMA 4100L is a significantly larger machine with 1,000 mm swing and 4,000 mm turning length targeting shaft, roll, and forging work where the workpiece size exceeds what the 3100M can accommodate. The 4100L is not a production machine — it is a large-batch or one-off machine for the heaviest work.
05
DN Solutions (formerly Doosan Machine Tools) services its own machines through a network of North American service engineers and the distributor network. For large-machine installations like the 4100L, DN Solutions typically sends a factory installation team for commissioning, leveling, and operator training. Ongoing service is provided by regional service engineers. Given the machine's scale, spare parts should be pre-ordered for critical components with long lead times.
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