DN Solutions DNX 2100 SB

$250,000 - $350,000 Updated 2026-03-19

Key Specifications

Max Turn Length

1100 mm

chuck size main

254 mm (10 in)

chuck size sub

203 mm (8 in)

max turning diameter

520 mm

left spindle speed

4,000 RPM

left spindle power

22 kW (29.5 hp)

Overview

The DN Solutions DNX 2100 SB is the flagship of the DNX 2100 multitasking family, combining the big-bore 10-inch main chuck with a sub-spindle for complete part production. You get the best of both worlds: the 456 Nm (336.3 ft-lb) torque of the B variant for heavy main-spindle roughing, plus the sub-spindle capability of the S variant for back-end operations. Parts go in as raw stock and come out finished.

The main spindle runs a 10-inch chuck at 4,000 RPM with 22 kW (29.5 hp) and that 456 Nm of torque. The sub-spindle matches the S model's 8-inch chuck at 5,000 RPM with 18.5 kW and 326 Nm (240.5 ft-lb). This asymmetric configuration makes practical sense — the main spindle does the heavy roughing and primary features, then hands the part to the sub-spindle for lighter back-end work. Maximum turning diameter is 520 mm (20.5 in) with 1,100 mm (43.3 in) of length.

The B-axis milling head works with both spindles, so you can mill features on both the front and back of the part without any manual intervention. Cross-holes, keyways, flats, thread milling — all handled in the same cycle. For parts like hydraulic valve bodies, pump housings, and aerospace fittings that have features on multiple faces, this machine eliminates three or four separate operations.

At 11,000 kg (24,251 lb), the SB is the heaviest DNX 2100 variant, reflecting the additional sub-spindle mass. The 4,615 x 2,285 mm footprint stays consistent across the family. DN Solutions runs the Fanuc 0i-Plus control with iHMI, handling the dual-spindle synchronization, part handoff choreography, and simultaneous milling/turning coordination.

The DNX 2100 SB sits at the top of DN Solutions' mid-range multitasking lineup. For shops that need both heavy roughing authority and complete part production, there's no compromise required — this machine does both.

Full Specifications

Parameter	Value
Chuck Size Main	254 mm (10 in)
Chuck Size Sub	203 mm (8 in)
Max Turning Diameter	520 mm
Max Turning Length	1100 mm
Left Spindle Speed	4,000 RPM
Left Spindle Power	22 kW (29.5 hp)
Left Spindle Torque	456 Nm (336.3 ft-lb)
Right Spindle Speed	5,000 RPM
Right Spindle Power	18.5 kW (24.8 hp)
Right Spindle Torque	326 Nm (240.5 ft-lb)
Machine Dimensions	4,615 x 2,285 x 2,630 mm
Machine Weight	11,000 kg (24,251 lb)
CNC Control	Fanuc 0i-Plus with 15" iHMI touchscreen
Chuck Size	255 mm
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	DNX 2100SB

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

Strengths & Limitations

Strengths

456 Nm main spindle torque with sub-spindle — heavy roughing and complete part production in one machine
10-inch main chuck handles larger work pieces than the 8-inch S model without losing sub-spindle capability
B-axis milling works with both spindles for complex features on all faces of the part
Asymmetric spindle configuration matches real-world use — heavy roughing on main, finish on sub
11,000 kg machine weight provides rigidity for both demanding turning and precision milling
Eliminates 3-4 separate operations on complex parts, dramatically reducing WIP and lead time

Limitations

Top-of-range pricing at $250,000+ requires significant part volume or complexity to justify ROI
Most complex DNX variant demands the highest operator skill level for programming and setup
4,000 RPM main spindle limits surface speed on small-diameter aluminum features
11,000 kg weight and dual-spindle mechanics increase foundation requirements and maintenance complexity
Sub-spindle chuck is smaller than main — parts exceeding 8 inches need alternative back-end solutions

Best For

Production shops making complex parts with features on multiple faces that currently require 3+ operations Hydraulic valve body and pump housing manufacturers needing cross-holes, ports, and turned features complete Aerospace facilities producing fittings and housings with tight tolerances on both ends Oil and gas manufacturers running tough materials that demand high main-spindle torque plus sub-spindle finish Shops wanting the most capable mid-range multitasking turning center in the DN Solutions lineup

Frequently Asked Questions

01 What does a DN Solutions DNX 2100 SB cost?

New DNX 2100 SB machines run $250,000-$350,000 depending on tooling and options. It's the most expensive DNX 2100 variant, but the combined big-bore main spindle and sub-spindle capability eliminates the need for additional machines on complex parts.

02 When should I choose the SB over the S?

Choose the SB when your parts need heavy roughing with a 10-inch chuck on the front end (thick-walled housings, large flanges, tough materials). Choose the S when your parts fit in an 8-inch chuck and you want matched spindle speeds on both ends. The SB costs more and runs the main spindle slower (4,000 vs 5,000 RPM).

03 Can the DNX 2100 SB run unattended?

With proper tooling, bar feeding or gantry loading, and sufficient tool life, the dual-spindle cycle supports extended unattended operation. The sub-spindle handoff happens automatically within the program. Full lights-out requires tool breakage detection, part catchers, and coolant management.

04 How does this compare to the SMX 2100 series?

The SMX 2100 is DN Solutions' premium multitasking platform with higher torque, more axis options, and greater turning capacity (600 mm diameter). The DNX 2100 SB is more accessible in price while covering most mid-size production work. For 10-inch chuck parts with moderate complexity, the DNX does the job. For larger or more complex work, step up to the SMX.