DN Solutions PUMA 4100 LMB

$200,000 - $280,000 Updated 2026-03-19

Key Specifications

Max Spindle

2,000 RPM

Spindle Power

30 kW (40 hp)

Max Turn Length

2028 mm

chuck size

15 inch

max turning diameter

550 mm

x axis travel

352 mm (14 in)

Overview

The DN Solutions PUMA 4100 LMB is the 15-inch chuck, long-bed variant of the PUMA 4100 series. It steps up from the 12-inch LMA with a 381 mm (15 in) chuck and significantly more torque — 1,611 N-m (1,188 ft-lb) — for shops working with larger diameter stock in tougher materials. The long-bed configuration keeps the 2,028 mm (80 in) max turning length for extended shaft and pipe work.

The spindle runs 30 kW (40 hp) at up to 2,000 RPM. The lower speed versus the LMA reflects the larger chuck and heavier workpieces this machine handles — at 15-inch chuck diameters, 2,000 RPM still provides adequate surface speed for steel and alloy work. That 1,611 N-m of torque is where the real capability lives. Heavy interrupted cuts on forgings, castings, and large-diameter bar stock are this machine's daily bread.

Axis travels match the LMA at 352 mm (14 in) on X and 2,155 mm (85 in) on Z, with 16/20 m/min rapids. The 12-station turret runs 4,000 RPM live tooling. Max turning diameter is 550 mm (22 in) and turning length is 2,028 mm (80 in) — slightly less than the LMA due to the larger chuck taking more Z real estate.

At 11,550 kg (25,463 lb), you're in engineered-foundation territory. The mass contributes to rigidity and vibration damping, which matters when you're taking heavy cuts at 1,600+ N-m of torque. The FANUC 0i-TF Plus control handles all the turning and milling programming.

The LMB occupies the middle ground between the 12-inch LMA and the 21-inch LMC. For shops where 15-inch is the standard chuck size and long parts are the norm, this is the sweet spot in the 4100 long-bed lineup.

Full Specifications

Parameter	Value
Chuck Size	15 inch
Max Turning Diameter	550 mm
Max Turning Length	2028 mm
X Axis Travel	352 mm (14 in)
Z Axis Travel	2,155 mm (85 in)
Rapid Traverse X	16 m/min (630 ipm)
Rapid Traverse Z	20 m/min (787 ipm)
Max Spindle Speed	2,000 RPM
Spindle Motor Power	30 kW (40 hp)
Spindle Torque	1,611 N-m (1,188 ft-lb)
Turret Stations	12-station with live tooling
Rotary Tool Speed	4,000 RPM
Machine Weight	11,550 kg (25,463 lb)
CNC Control	FANUC 0i-TF Plus
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 stationRotary Tool r/min
No Of Tool Station	Rotary Tool r/min
Dimensions	LengthHeightWidthWeight
Favorites	PUMA 5100XLMB
12 Ea	4000 RPM

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

Strengths & Limitations

Strengths

1,611 N-m (1,188 ft-lb) torque handles heavy roughing on large-diameter forgings and castings
15-inch chuck grips larger stock securely for heavy-duty production turning
2,028 mm (80 in) turning length handles long shafts and tubular work
Live tooling at 4,000 RPM adds milling capability for cross-features along the work length
Heavy 11,550 kg construction provides exceptional vibration damping
FANUC 0i-TF Plus control with proven reliability

Limitations

2,000 RPM max speed limits smaller-diameter work where higher speeds are needed
30 kW (40 hp) is less power than the LMA despite the larger chuck — gearing favors torque over speed
11,550 kg requires engineered foundations
16/20 m/min rapids are relatively slow for production cycling

Best For

Shops running 15-inch chuck work with extended turning lengths Oil & gas manufacturers turning large-diameter pipe and downhole components Heavy equipment and mining component manufacturers Industrial maintenance shops reconditioning large shafts and rollers Production facilities needing high torque for roughing forgings and castings

Frequently Asked Questions

01 Why does the LMB have less horsepower than the LMA?

The LMB uses 30 kW (40 hp) versus the LMA's 37 kW (50 hp), but the gearing delivers 1,611 N-m versus 1,024 N-m of torque. The power is redirected from speed to torque — at 15-inch chuck diameters, torque matters more than RPM. The LMB actually has more cutting authority at typical operating speeds.

02 Can the LMB turn smaller parts efficiently?

It can, but it's not optimized for it. At 2,000 RPM max, small-diameter parts won't achieve optimal surface speeds for finishing. If you regularly run both small and large parts, the LMA with its 3,000 RPM and 12-inch chuck is more versatile.

03 How does the LMB compare to the standard-bed MB?

Same spindle specs and chuck size. The LMB has 2,028 mm turning length versus the MB's 978 mm. The LMB is about 1,450 kg heavier. For parts under 978 mm, the MB saves floor space and cost.

04 Is tailstock support recommended?

For long shaft work on the 2+ meter bed, a programmable tailstock is strongly recommended. It prevents deflection and maintains tolerance on slender parts. Most production setups include the tailstock as a standard option.