DN Solutions NX 5500 II
Key Specifications
X Travel
Y Travel
Z Travel
Max Spindle
Spindle Taper
Tool Capacity
Overview
The DN Solutions NX 5500 II is a high-performance die and mold VMC built around a symmetrical double-column (bridge) structure that provides exceptional rigidity for high-precision finishing of hardened tool steel. The "NX" designation in DN Solutions' lineup signals a machine oriented toward mold, die, and high-precision production work — not general-purpose job shop use. The II suffix denotes the current generation with improved thermal stability, enhanced spindle bearing preload management, and updated control software.
The symmetrical bridge structure is the defining characteristic of the NX series. Unlike a conventional C-frame VMC where column flex is a limiting factor for precision, the bridge design constrains the spindle head from two sides, dramatically reducing thermal growth asymmetry and column deflection under cutting loads. The result is measurably better volumetric accuracy and surface finish consistency across long machining cycles — exactly what die and mold work demands.
Axis travels of 1,050 x 550 x 500 mm (41 x 22 x 20 in) cover most medium-to-large mold bases. The table measures 1,200 x 600 mm (47 x 24 in) with a 2,000 kg (4,409 lb) load capacity — significantly higher than a conventional VMC of similar travel, reflecting the heavy mold bases this machine is built to handle. The spindle delivers 15,000 RPM through a BT 40 taper with 22 kW (30 hp) and 143 Nm (105 ft-lb) of torque, providing the high-speed finishing capability critical for smooth mold surfaces alongside adequate torque for steel roughing.
The linear roller guideways are oversized for the machine class, with 45 mm rollers on all axes, contributing to the rigid, vibration-free cutting behavior that characterizes the NX series. Ball screws are 40 mm diameter on X/Y and 50 mm on Z for maximum stiffness. Rapid traverse rates of 36/36/30 m/min (X/Y/Z) keep non-cutting time competitive. At 14,000 kg (30,865 lb), the NX 5500 II is more than twice the weight of a comparable C-frame VMC — that mass is the foundation of its precision. The FANUC 0i-MF Plus control with Siemens 828D as an option supports the high-speed surface machining cycles used in mold finishing.
Full Specifications
| Parameter | Value |
|---|---|
| X-Axis Travel | 1,050 mm (41 in) |
| Y-Axis Travel | 550 mm (22 in) |
| Z-Axis Travel | 500 mm (20 in) |
| Max Spindle Speed | 15,000 RPM (20,000 RPM optional) |
| Spindle Motor Power | 22 kW (30 hp) |
| Spindle Torque | 143 Nm (105 ft-lb) |
| Spindle Taper | BT 40 (BIG-PLUS) |
| Tool Capacity | 30 (40, 60 optional) |
| Tool Change Time | 1.2 sec (tool-to-tool) |
| Table Size | 1,200 x 600 mm (47 x 24 in) |
| Table Load Capacity | 2,000 kg (4,409 lb) |
| Rapid Traverse X | 36 m/min (1,417 ipm) |
| Rapid Traverse Y | 36 m/min (1,417 ipm) |
| Rapid Traverse Z | 30 m/min (1,181 ipm) |
| Guideway Type | Roller linear guideways, 45 mm |
| Ball Screw Diameter | 40 mm (X/Y), 50 mm (Z) |
| Column Structure | Symmetrical double-column (bridge) |
| Positioning Accuracy | 0.005 mm (0.0002 in) |
| Repeatability | 0.003 mm (0.00012 in) |
| Machine Weight | 9000kg |
| Machine Dimensions | 3,600 x 3,100 x 3,200 mm (142 x 122 x 126 in) |
| CNC Control | FANUC 0i-MF Plus (Siemens 828D optional) |
| X Axis Travel Distance | 900 mm |
| Y Axis Travel Distance | 550 mm |
| Z Axis Travel Distance | 500 mm |
| X Axis Rapid Traverse | 30 m/min |
| Y Axis Rapid Traverse | 30 m/min |
| Z Axis Rapid Traverse | 30 m/min |
| Max Spindle Speed | 40000 r/min |
| Max Spindle Power | 22 kW |
| Max Spindle Torque | 60 N·m |
| Table Length | 1000 mm |
| Table Width | 550 mm |
| Max Table Weight | 700 kg |
| No Of Tool Station | 30 |
| Length | 2530mm |
| Width | 2900mm |
| Height | 3064mm |
Specifications sourced from millscnc.co.uk — verified 2026-03-28
Strengths & Limitations
Strengths
- Symmetrical double-column (bridge) structure eliminates asymmetric column flex, delivering best-in-class volumetric accuracy for die and mold work compared to C-frame VMCs
- 14,000 kg machine mass provides exceptional vibration damping, enabling aggressive roughing in hardened tool steel without chatter
- 2,000 kg table load capacity handles the heaviest mold bases and die plates that mid-size C-frame VMCs cannot safely support
- 15,000 RPM BT 40 spindle covers the full range from steel roughing to fine mold finishing in a single machine
- Oversized 45 mm roller guideways and 50 mm Z-axis ball screws provide rigidity that translates directly into better surface finish and tighter tolerances
Limitations
- 14,000 kg weight and 3.6m x 3.1m footprint require significant floor space and almost certainly need a reinforced concrete foundation
- Price premium over conventional C-frame VMCs is substantial — NX 5500 II costs 3-4x a comparable DNM 5700
- BT 40 taper is the limiting factor for the heaviest roughing cuts where CAT 50 or HSK-A63 machines would have an advantage
- Longer setup times for small or light parts due to the scale and weight of the machine — not suited to small-part general work
- Specialized machine requires operators comfortable with high-speed mold finishing cycles; not ideal as an all-purpose shop VMC
Best For
Frequently Asked Questions
01
New NX 5500 II machines typically price between $280,000 and $420,000 depending on spindle speed, tool magazine size, high-pressure coolant options, and probing packages. Base machines start around $280,000-$320,000. Fully loaded configurations with 20,000 RPM spindle, 60-tool ATC, high-pressure through-spindle coolant, and workpiece probing reach $380,000-$420,000.
02
A conventional C-frame VMC has the column on one side of the bed, which creates inherent asymmetry — the spindle head experiences different amounts of deflection depending on Y-axis position. The bridge structure constrains the spindle head from both sides simultaneously, eliminating this asymmetry. The result is more consistent accuracy across the full table surface, lower thermal gradient from column to table, and much higher resistance to the bending moments created by large cutting forces. For mold work where ±0.005 mm accuracy is expected across a 1-meter surface, this matters.
03
The Makino V55/V56 are the benchmark for high-speed mold VMCs and are widely considered superior in spindle quality, surface finish, and thermal management. The NX 5500 II trades some of that precision for a significantly lower acquisition cost — typically 30-40% less than a comparable Makino. For shops where Makino-level precision is not the primary requirement, the NX 5500 II delivers competitive mold quality at a more accessible price point.
04
Yes. The bridge structure rigidity, high table load capacity, and 15,000-20,000 RPM spindle make the NX 5500 II suitable for hard milling in hardened tool steel at 58-62 HRC. Typical applications include finishing hardened P20, H13, and D2 cavities and cores with small-diameter ball nose end mills. Roughing hardened material is possible but best done before heat treatment on a machine with more torque.
05
At 14,000 kg, a reinforced concrete foundation is strongly recommended. DN Solutions typically specifies a 300-400 mm thick reinforced concrete pad for the NX series. Standard shop floors rated for 4,000-5,000 kg/m² equipment loads may need reinforcement. Consult your DN Solutions dealer for foundation drawings and requirements before placing the machine order.
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