DN Solutions PUMA 4100 LB

$190,000 - $270,000 Updated 2026-03-19

Key Specifications

Max Spindle

2,000 RPM

Spindle Power

35 kW (47 hp)

Max Turn Length

2092 mm

chuck size

15 inch

max turning diameter

550 mm

x axis travel

352 mm (13.9 in)

Overview

The DN Solutions PUMA 4100 LB is the long-bed, 15-inch chuck variant of the PUMA 4100 — the balanced choice when you need both the extended Z travel for long parts and the workholding capacity for medium-large diameters. It pairs the same 35 kW (47 hp) spindle found across the 4100 family with 2,379 N-m (1,755 ft-lb) of torque at up to 2,000 RPM.

Max turning diameter is 550 mm (22 in) and max turning length is 2,092 mm (82 in), with axis travels of 352 mm on X and 2,155 mm on Z. Rapids run at 16/20 m/min. The 10-station turret handles heavy-duty tooling for the kind of multi-pass roughing programs that long-part work demands.

The machine weighs 11,400 kg (25,133 lb) on a 5,774 mm x 2,275 mm footprint. Box-way construction throughout. FANUC control. Programmable tailstock is the expected configuration for this bed length.

The LB is essentially the long-bed equivalent of the standard 4100 B. You get the same 15-inch chuck, same torque, same power — just with an additional meter of Z travel. That extension opens up drive shafts, pump shafts, long hydraulic cylinders, and similar components that the standard bed can't reach.

The 15-inch chuck is the middle ground between the 12-inch LA (which has more speed) and the 21-inch LC (which has more grip). For most long-shaft work in the 4- to 15-inch diameter range, the LB's combination of 2,000 RPM, 2,379 N-m torque, and 15-inch jaws covers the broadest range of applications. It's the default recommendation for shops buying their first long-bed PUMA 4100.

Full Specifications

Parameter	Value
Chuck Size	15 inch
Max Turning Diameter	550 mm
Max Turning Length	2092 mm
X Axis Travel	352 mm (13.9 in)
Z Axis Travel	2,155 mm (84.8 in)
Rapid Traverse X	16 m/min (630 in/min)
Rapid Traverse Z	20 m/min (787 in/min)
Max Spindle Speed	2,000 RPM
Spindle Motor Power	35 kW (47 hp)
Spindle Torque	2,379 N-m (1,755 ft-lb)
Turret Stations	10
Machine Length	5,774 mm (227 in)
Machine Height	2,272 mm (89 in)
Machine Width	2,275 mm (90 in)
Machine Weight	11,400 kg (25,133 lb)
CNC Control	FANUC
Metric	IMPERIAL
Capacity	Chuck sizeMax. Turning DiameterMax. Turning Length
Travels	X-Axis Rapid TraverseZ-Axis Rapid TraverseX-Axis Travel DistanceZ-Axis Travel Distance
Main Spindle	Max. Spindle SpeedMax. Spindle PowerMax. Spindle Torque
Turret	No. of tool station
Dimensions	LengthHeightWidthWeight
Favorites	PUMA 5100XLC

Specifications sourced from dn-solutions.com — verified 2026-03-28

Strengths & Limitations

Strengths

2,379 N-m (1,755 ft-lb) of torque handles heavy roughing on large-diameter sections of long shafts
15-inch chuck balances workholding capacity with a reasonable RPM ceiling for versatile turning
2,092 mm (82 in) turning length accommodates long shafts, cylinders, and rollers in a single setup
Box-way construction provides the rigidity needed for heavy cuts across a long bed length
47 hp spindle sustains material removal on long roughing passes common in shaft production
Same proven 4100 platform with strong dealer support and deep knowledge base in the industry

Limitations

2,000 RPM max spindle speed is limiting for small-diameter features — the 12-inch LA offers 3,000 RPM
10-station turret has 2 fewer positions than the 12-inch LA variant
5,774 mm machine length demands significant floor space and planning for workpiece loading access
11,400 kg weight requires proper foundation preparation and rigging capabilities
16/20 m/min rapids make long Z-axis repositioning moves time-consuming

Best For

Shops turning long shafts, pump spindles, and hydraulic cylinders that need 15-inch chuck grip Oil and gas manufacturers making long valve stems, actuator shafts, and downhole components Heavy equipment builders turning drive shafts, axle components, and rollers up to 82 inches long Job shops needing a balanced long-bed lathe that handles the broadest range of part sizes and materials Facilities standardized on the PUMA 4100 platform looking to add long-bed capability

Frequently Asked Questions

01 Is the PUMA 4100 LB the best all-around long-bed 4100?

For most shops, yes. The 15-inch chuck and 2,000 RPM/2,379 N-m combination covers the widest range of work. The 12-inch LA is better for smaller-diameter parts where speed matters, and the 21-inch LC is better for gripping the largest diameters. If you're not sure which you need, the LB is the safest bet.

02 Why does the LB have 10 turret stations while the LA has 12?

The different chuck and spindle configurations affect turret clearance geometry. The 15-inch chuck LB accommodates 10 stations, while the smaller 12-inch chuck LA fits 12. In practice, 10 stations handles most long-part programs; you'll rarely need more than 8-9 tools for shaft work.

03 How important is a tailstock on the PUMA 4100 LB?

For long-part work, it's essential. At 2,092 mm turning length, unsupported workpieces will deflect and chatter even on moderate cuts. The programmable tailstock should be considered standard equipment, not optional. A steady rest may also be needed for slender parts.

04 How does the 4100 LB compare to the 5100 LA?

The 5100 LA swings 650 mm (vs 550 mm), has a heavier build, and more torque. If your parts exceed 22 inches in diameter or you're doing very heavy cuts, the 5100 is the step up. For shaft work under 22 inches diameter, the 4100 LB is typically sufficient and costs less.