DN Solutions SMX 5100 LS

$620,000 - $850,000 Updated 2026-03-19

Key Specifications

Max Turn Length

3050 mm

max turning diameter

830 mm

chuck size

15 inch

left spindle speed

2,400 RPM

left spindle power

37 kW (49.6 hp)

left spindle torque

1,643 Nm (1,212 ft-lbs)

Overview

The DN Solutions SMX 5100 LS pairs a 15-inch chuck main spindle with a matching sub spindle on the company's largest multi-tasking platform. With 3,050 mm (120 in) of turning length and 830 mm (32.7 in) of turning diameter, it's built for complete processing of the biggest parts in heavy industry — no second setup, no crane moves between machines.

The left spindle delivers 37 kW (49.6 hp) at 2,400 RPM with 1,643 Nm (1,212 ft-lbs) of torque through the 15-inch chuck. The right sub spindle matches at 37 kW and 2,400 RPM with 1,643 Nm — this isn't a reduced-power sub spindle. Both sides deliver identical cutting capability, so back-working gets the same level of performance as first-op machining.

The B-axis milling spindle runs at 12,000 RPM for cross-drilling, angular milling, and 5-axis contouring on parts that would otherwise bounce between a heavy lathe, a boring mill, and a machining center. The FANUC 31i-B5 control with CUFOS manages synchronized spindle handoffs for automated part transfer across the full 3,050 mm bed length.

At 32,200 kg (70,988 lb), the LS is slightly heavier than the single-spindle L variant. The footprint extends to 9,522 x 3,597 x 3,346 mm — 300 mm longer than the L to accommodate the sub spindle assembly. You'll need an overhead crane for loading and unloading, and the foundation requirements are substantial.

The SMX 5100 LS serves shops in power generation, marine, oil and gas, and heavy equipment that need done-in-one production on their largest parts. It competes against machines in the Mazak Integrex e-1600 class and large DMG Mori NTX platforms, typically at a 20-30% price advantage.

Full Specifications

Parameter	Value
Max Turning Diameter	830 mm
Max Turning Length	3050 mm
Chuck Size	15 inch
Left Spindle Speed	2,400 RPM
Left Spindle Power	37 kW (49.6 hp)
Left Spindle Torque	1,643 Nm (1,212 ft-lbs)
Right Spindle Speed	2,400 RPM
Right Spindle Power	37 kW (49.6 hp)
Right Spindle Torque	1,643 Nm (1,212 ft-lbs)
Milling Spindle Speed	12,000 RPM
B Axis Range	240° (+/-120°)
Machine Weight	32,200 kg (70,988 lb)
Machine Dimensions	9,522 x 3,597 x 3,346 mm
CNC Control	FANUC 31i-B5 with CUFOS
Metric	IMPERIAL
Capacity	Chuck sizeMax. Turning DiameterMax. Turning Length
Left Spindle	Max. Spindle SpeedMax. Spindle PowerMax. Spindle Torque
Right Spindle	Max. Spindle SpeedMax. Spindle PowerMax. Spindle Torque
Dimensions	LengthHeightWidthWeight
Favorites	SMX5100XLB

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

Strengths & Limitations

Strengths

Matched 37 kW / 1,643 Nm spindles on both sides deliver full-power turning and back-working — no compromise on second ops
3,050 mm turning length with sub spindle enables complete processing of ten-foot parts on both ends
830 mm turning diameter with 15-inch chucks handles the largest multi-tasking workpieces in the DN Solutions lineup
B-axis milling at 12,000 RPM eliminates separate machining center and boring mill setups
32,200 kg mass provides exceptional thermal and dynamic stability for tight tolerances on heavy parts
20-30% price advantage over comparable Mazak and DMG Mori large multi-tasking platforms

Limitations

32,200 kg weight requires purpose-built reinforced foundation — major facility investment
9,522 mm length demands large floor area and careful layout planning around crane access
2,400 RPM spindle speed limits SFM on smaller diameter sections — not a high-speed platform
Part transfer across 3,050 mm bed length takes more time than shorter-bed machines
No lower turret — simultaneous machining requires different machine configurations

Best For

Power generation shops machining large turbine shafts, generator rotors, and pump columns with features on both ends Marine propulsion manufacturers producing propeller shafts and stern tubes requiring complete multi-tasking Oil and gas shops running large downhole assemblies, drill collars, and wellhead components with back-working Heavy equipment manufacturers machining large rollers, heavy pins, and structural shafts over 2,000 mm long Shops replacing separate large-lathe and boring-mill operations with a single multi-tasking setup

Frequently Asked Questions

01 What does a new SMX 5100 LS cost?

New machines price between $620,000 and $850,000. The sub spindle adds roughly $70-100K over the single-spindle L variant. Budget separately for foundation ($50-100K), rigging and installation ($25-50K), and specialized tooling.

02 Are both spindles truly matched in power?

Yes. Both the left and right spindles deliver 37 kW at 2,400 RPM with 1,643 Nm of torque. This is relatively unusual — many large multi-tasking machines use a reduced-power sub spindle. The matched specification means you can run equally aggressive cuts on both first and second ops.

03 How does part transfer work on a 3-meter bed?

The sub spindle traverses along the Z-axis to the workpiece, synchronized speed matching kicks in, the sub spindle clamps, and the main spindle releases. On a 3,050 mm bed, the transfer traverse takes more time than shorter machines — plan for 15-30 seconds of non-cutting time per transfer cycle.

04 Can I use steady rests on the SMX 5100 LS?

Yes. Hydraulic steady rests are essential equipment for long, slender parts on this platform. With 3,050 mm turning length, many parts will have L/D ratios that cause chatter without intermediate support. The machine can be equipped with one or more CNC-controlled steady rests.