Doosan Puma 4100B
Key Specifications
X Travel
Z Travel
Max Spindle
Spindle Power
Max Turn Length
max swing over bed
Overview
The Doosan Puma 4100B is a large-bore, large-swing CNC turning center designed for the heavy-duty turning of large-diameter workpieces in oil and gas, energy, marine, and aerospace manufacturing. With a 15-inch (381mm) chuck, 105 mm spindle bore, and 660 mm maximum swing over the bed, the Puma 4100B handles shaft work, flange components, valve bodies, and large-diameter rotationally symmetric parts that exceed the capacity of mid-range turning centers.
The B designation indicates a boxway construction — the Puma 4100B uses box-type sliding guideways rather than linear roller guides, providing maximum rigidity and vibration damping for the heavy interrupted cuts common in large-diameter shaft and flange turning. Boxway construction is the preferred configuration for turning large forgings, castings, and pre-machined billets where cutting forces are high and workpiece surface is irregular.
The Puma 4100B's 37 kW main spindle at 2,000 RPM provides high torque at the low speeds required for large-diameter work — turning a 500mm diameter forged steel component at appropriate surface speed requires only 300-600 RPM, where maximum torque (not maximum power) determines metal removal rate. The machine accommodates components up to 3,000 mm between centers in long shaft configurations.
At $300,000-$450,000, the Puma 4100B competes with Mazak Quick Turn Nexus 450-II, Okuma LT-3000 EX, and other large-bore turning centers in the heavy-duty segment. Doosan's pricing advantage and the Puma series' excellent reliability record in heavy-duty applications make the 4100B a strong value proposition for oil and gas and energy sector manufacturers.
Full Specifications
| Parameter | Value |
|---|---|
| Max Swing Over Bed | 660 mm (26 in) |
| Max Turning Diameter | 590 mm (23.2 in) |
| Max Turning Length | 3,000 mm (118 in) between centers |
| Chuck Size | 31 inches |
| Spindle Bore | 105 mm (4.1 in) |
| Main Spindle Speed | 2,000 RPM |
| Main Spindle Power | 37 kW (49.6 hp) |
| Guideway | Box ways |
| Turret Stations | 12 stations |
| Bar Capacity | 117 mm |
| CNC Control | Fanuc 0iTF / Siemens 828D |
| Machine Weight | ~13,000 kg (28,660 lb) |
| Manufacturer | Doosan |
| Model | PUMA 4100 |
| X-Axis Travel | 352 mm |
| Z-Axis Travel | 1105 mm |
| Max Spindle Speed | 2,000 rpm |
| Spindle Motor Power | 37 kW |
| Cnc Control | FANUC 32i |
Specifications sourced from machinio.com — verified 2026-03-28
Strengths & Limitations
Strengths
- 660 mm swing and 105 mm bore handles large-diameter oil and gas valves, flanges, and energy sector components
- Boxway construction provides maximum rigidity for heavy interrupted cuts in large forgings and castings
- 37 kW spindle delivers high torque at low RPM required for large-diameter heavy turning work
- 3,000 mm between-centers capacity handles long shaft work common in oil and gas and marine applications
- 15-inch chuck accommodates large-diameter workpieces without custom jaw sets
- Competitive pricing versus Mazak and Okuma equivalents in the large-bore turning center segment
Limitations
- 2,000 RPM maximum spindle speed limits the machine for small-diameter high-speed operations — it is a large-diameter machine
- Boxway construction sacrifices rapid traverse speed for rigidity — not a high-speed machine
- 13,000 kg machine weight requires solid foundation preparation
- No sub-spindle option on the standard 4100B — second-operation work requires manual refixturing or a separate machine
Best For
Frequently Asked Questions
01
The Puma 4100B can swing (turn) parts up to 660 mm in diameter over the bed. The maximum turning diameter in the turret clearance zone is 590 mm. Parts up to this diameter can be turned to full length within the between-centers capacity. For larger diameter parts (600-800mm), operators sometimes machine with the tailstock removed, which limits support but allows larger diameter above the cross slide.
02
Boxways provide higher static and dynamic rigidity than linear roller guideways, which is essential for large-diameter heavy turning where cutting forces are high and often interrupted (as in turning castings and forgings with uneven surface). Linear guideways provide faster traverse speeds and smoother motion but have lower load capacity and are more susceptible to damage from the shock loads inherent in heavy turning. For large-diameter heavy work, boxways are the appropriate choice. For lighter, high-speed precision turning, linear guides are preferred.
03
Yes. In its maximum configuration, the Puma 4100B accommodates up to 3,000 mm between centers with a tailstock. This covers most shaft work in oil and gas, energy, and marine applications. For the longest shaft configurations, proper workpiece support (steady rests) is required at intermediate points to prevent workpiece deflection during turning. Doosan offers steady rest options for the Puma 4100B in various support diameter ranges.
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