DN Solutions BM 2740
Key Specifications
X Travel
Y Travel
Z Travel
Max Spindle
Spindle Taper
Tool Capacity
Overview
The DN Solutions BM 2740 is a large-format double-column vertical machining center with a fixed crossrail design, built for heavy-duty milling, drilling, and boring of oversized workpieces. The bridge-type construction provides exceptional rigidity by supporting the spindle from both sides, eliminating the cantilever deflection that limits single-column machines at this scale. With axis travel of 4,000 x 2,700 x 800 mm (157 x 106 x 31 in), the BM 2740 covers large mold bases, die plates, structural components, and machine frames that won't fit on conventional VMCs.
The fixed crossrail design means the Y-axis (crossrail height) is set during installation and doesn't move during cutting. This gives the BM 2740 superior rigidity compared to movable-crossrail designs, since there's no Y-axis slide to introduce compliance. The trade-off is that maximum workpiece height is limited by the fixed crossrail position, but for flat or moderately tall parts like mold bases and die plates, this is rarely a constraint.
The spindle delivers 37 kW (50 hp) at speeds up to 6,000 RPM through a CAT 50 / BT 50 taper, providing the torque needed for heavy face milling and boring in cast iron and steel. Rapid traverse reaches 15 m/min (590 ipm) on X and Z axes. The table spans approximately 4,500 x 2,200 mm (177 x 87 in) with a 15,000 kg (33,069 lb) load capacity — enough for the heaviest mold bases and structural plates.
At roughly 45,000 kg (99,208 lb), the BM 2740 delivers the mass needed to absorb cutting forces without chatter. The FANUC 0i-Plus control with high-speed surface finishing cycles is standard. A 40-tool magazine handles most mold and die work, with larger capacity options available. The BM 2740 competes with the Kuraki KMV-DC series, Toshiba MPF series, and Okuma MCR-A5C in the large double-column VMC segment. For shops that need 5-axis capability on a similar platform, DN Solutions offers the BM U series with an automatic head changer.
Full Specifications
| Parameter | Value |
|---|---|
| X-Axis Travel | 4,000 mm (157 in) |
| Y-Axis Travel | 2,700 mm (106 in) |
| Z-Axis Travel | 800 mm (31 in) |
| Max Spindle Speed | 6,000 RPM |
| Spindle Motor Power | 37 kW (50 hp) |
| Spindle Taper | CAT 50 / BT 50 |
| Crossrail Type | Fixed crossrail |
| Table Size | 4,500 x 2,200 mm (177 x 87 in) |
| Table Load Capacity | 15,000 kg (33,069 lb) |
| Rapid Traverse Xz | 15 m/min (590 ipm) |
| Tool Capacity | 40 (expandable) |
| Machine Weight | 45,000 kg (99,208 lb) |
| Guideway Type | Box guideways |
| CNC Control | FANUC 0i-Plus |
| X Axis Travel Distance | 2800mm |
| Y Axis Travel Distance | 1350mm |
| Z Axis Travel Distance | 750mm |
| Metric | IMPERIAL |
Specifications sourced from dn-solutions.com — verified 2026-03-28
Strengths & Limitations
Strengths
- Double-column bridge construction provides exceptional rigidity and eliminates cantilever deflection across the full 4,000 mm X-travel
- Fixed crossrail design maximizes stiffness for heavy face milling and boring, outperforming movable-crossrail designs in rigidity
- 15,000 kg table load capacity handles the heaviest mold bases, die plates, and structural components
- 37 kW spindle with CAT 50 taper delivers strong torque for aggressive material removal in cast iron and steel
- 4,000 x 2,700 mm travel envelope covers large mold and die work that won't fit on conventional VMCs
Limitations
- Fixed crossrail limits maximum workpiece height — not suitable for tall parts that need variable Y-axis positioning
- 800 mm Z-travel is relatively modest, restricting deep-cavity and tall-part machining applications
- 6,000 RPM spindle speed limits high-speed finishing capability compared to machines with 10,000+ RPM options
- 45,000 kg weight and large footprint require foundation engineering and substantial floor space
Best For
Frequently Asked Questions
01
A new DN Solutions BM 2740 typically falls between $500,000 and $900,000 depending on spindle options, tool magazine size, and probing packages. The fixed crossrail design is generally less expensive than comparable movable-crossrail models. Used BM-series machines from the Doosan era are occasionally available for $200,000-$400,000.
02
A fixed crossrail means the horizontal beam supporting the spindle is locked at a set height, with the Z-axis (spindle quill) providing vertical movement. This eliminates a major source of compliance — a movable crossrail must be clamped and unclamped during positioning, and even when clamped, it's inherently less rigid than a permanently fixed structure. For flat parts like mold bases and die plates, the fixed crossrail provides superior surface finish and dimensional accuracy.
03
The BM 2740 has a fixed crossrail offering maximum rigidity for heavy cutting on flat and low-profile parts. The DBM series features a movable W-axis crossrail that adds vertical flexibility for taller workpieces at the cost of some rigidity. Choose the BM for mold bases, die plates, and flat structural parts. Choose the DBM when you need to machine tall workpieces or access features at varying heights.
04
The standard BM 2740 is a 3-axis machine. DN Solutions offers the BM U series (e.g., BM 2035 U) that adds a universal milling head with A/C axis capability for 5-axis double-column machining. If your work requires 5-axis contouring on large parts, the BM U or DCM U series are the right platforms.
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Community Discussions
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