Doosan DNM 750 II
Key Specifications
X Travel
Y Travel
Z Travel
Max Spindle
Spindle Taper
Table Size
Overview
The Doosan DNM 750 II is a large-table vertical machining center in Doosan Machine Tools' popular DNM series, extending the proven DNM platform to an 762 mm Y-axis travel with correspondingly larger table capacity. The DNM 750 II targets job shops, automotive component manufacturers, and precision engineering operations that require a VMC capable of handling large workpieces — long aluminum extrusions, large steel fixtures, big casting plates, and aerospace structural parts — that exceed the capacity of standard 500–650 mm class VMCs. The II designation indicates the second-generation design with updated structural and control improvements over the original DNM 750.
Doosan's DNM series has earned a strong reputation globally for delivering dependable German-quality-inspired construction standards from a Korean manufacturer at prices competitive with Taiwanese VMCs. The DNM 750 II maintains this positioning with a heavily-ribbed cast iron column and base, thermo-symmetrical design to reduce thermal deformation during extended cutting, and linear roller guideways on all three axes providing the combination of fast rapid traverse and good rigidity needed for large-workpiece production. The machine's fit and finish quality, service network depth, and parts availability through DN Solutions (Doosan's reformed machine tools brand) support the DNM 750 II as a production workhorse investment.
The spindle on the DNM 750 II is a BT 50 unit running to 8,000 RPM standard with a 22 kW motor, providing the torque appropriate for large-diameter facing and heavy roughing operations on steel and cast iron plates typical of the machine's target applications. An optional 12,000 RPM configuration is available for shops requiring higher spindle speed for aluminum and mixed-material work. The ATC carries 30 tools standard with 40-tool optional, and the Fanuc 0i-MF Plus control is standard with Siemens 828D and 840D sl available for European customers.
Doosan's global service and support infrastructure is a meaningful advantage for the DNM 750 II over smaller VMC brands. DN Solutions maintains factory-authorized service centers and parts warehousing on multiple continents, with application engineering support available through the distributor network for programming, tooling optimization, and workholding. For shops buying their first large-table VMC, this support depth reduces the risk associated with learning how to make a large, expensive machine productive from the day of installation.
Pricing for the Doosan DNM 750 II is estimated between $135,000 and $200,000 depending on spindle, control, and option configuration. This positions it favorably against Japanese large-table VMCs at equivalent capacity while offering a meaningful quality step above budget Taiwanese VMCs in the same travel class. For shops needing large-table VMC capability with strong global support at a competitive price, the DNM 750 II is a natural consideration.
Full Specifications
| Parameter | Value |
|---|---|
| X-Axis Travel | 1,050 mm (41.3 in) |
| Y-Axis Travel | 762 mm (30.0 in) |
| Z-Axis Travel | 625 mm (24.6 in) |
| Table Size | 1630 x 760 mm (64.2 x 29.9 in) |
| Max Workpiece Weight | 1,200 kg (2,646 lb) |
| Max Spindle Speed | 8,000 RPM (12,000 RPM optional) |
| Spindle Taper | BT 50 |
| Spindle Motor Power | 22 kW (30 hp) |
| Spindle Torque | 350 Nm peak |
| Rapid Traverse Rate | 36 m/min (X/Y); 30 m/min (Z) |
| Feed Rate Max | 15,000 mm/min |
| Tool Changer Capacity | 30 tools arm-type ATC (40-tool optional) |
| Tool Change Time | 2.5 sec (tool-to-tool) |
| Positioning Accuracy | ±0.004 mm |
| Repeatability | ±0.002 mm |
| Guideway Type | Linear roller guideways (X/Y/Z) |
| Through Spindle Coolant | 40 bar / 70 bar optional |
| CNC Control | Fanuc 0i-MF Plus (Siemens 828D / 840D sl optional) |
| Machine Weight | 14000 kg (31680 lbs) |
| Lowest Price | Price |
| Highest Price | Price |
| Newest Listings | Release date |
| Oldest Listings | Release date |
| Shortest Distance | Distance |
| Farthest Distance | Distance |
| Newest Year Of Manufacture | Year of construction |
| Oldest Year Of Manufacture | Year of construction |
| Latest Update | Update |
| Oldest Update | Update |
| Manufacturer A To Z | Manufacturer |
| Manufacturer Z To A | Manufacturer |
| Designation From A To Z | Description |
| Designation From Z To A | Description |
| Model From A To Z | Model |
| Model From Z To A | Model |
| Lowest Reference | Ref.No. |
| Highest Reference | Ref.No. |
| Shortest Runtime | Runtime |
| Longest Duration | Runtime |
| Relevance | Relevance |
| Travel Distance X Axis | 1630 mm (64.2 in) |
| Travel Distance Y Axis | 762 mm (30 in) |
| Travel Distance Z Axis | 650 mm (25.6 in) |
| Rapid Traverse X Axis | 30 m/min (1181 in/min) |
| Rapid Traverse Y Axis | 30 m/min (1181 in/min) |
| Rapid Traverse Z Axis | 24 m/min (945 in/min) |
| Max Load | 1500 kg (3306 lbs) |
| Spindle To Table Distance | 150 - 800 mm (5.9 - 31.5 in) |
| Torque | 165.5 Nm (122 ft-lbs) |
| Speed | 12000 rpm |
| Power | 15.6 kW (21 Hp) |
| Shank | BIG PLUS CAT40 |
| Changer Capacity | 30 |
| Max Diameter | 80/125 mm (3.2/4.9 in) |
| Max Length | 300 mm (11.8 in) |
| Length | 4000 mm (157.5 in.) |
| Height | 3251 mm (128 in.) |
| Width | 2986 mm (117.6 in.) + 1323 mm (52.1 in.) |
Specifications sourced from ellisontechnologies.com — verified 2026-03-28
Strengths & Limitations
Strengths
- 1,050 x 762 mm table with 1,200 kg capacity handles large aluminum and steel workpieces — long extrusions, large plates, fixture assemblies, and castings — that exceed what standard 650 mm Y-travel VMCs can accommodate
- Doosan's DN Solutions global service network with factory-authorized service centers and parts warehousing in North America, Europe, and Asia provides significantly better support depth than smaller VMC brands, reducing machine downtime and installation risk
- 22 kW BT 50 spindle delivers adequate torque for heavy steel and cast iron facing, drilling, and milling operations on large workpieces where smaller BT 40 spindles require lighter cuts and more passes
- Linear roller guideways on all axes provide fast 36 m/min rapid traverse that maintains productivity in programs with many long-distance repositioning moves across the machine's large work envelope
- Competitive pricing at $135K–$200K positions the DNM 750 II as the accessible large-table VMC option for shops that need 1,050 mm X-travel without a Japanese-priced machine budget
Limitations
- ±0.004 mm positioning accuracy is production-grade but below the ±0.002–0.003 mm specifications of Japanese VMCs and premium Taiwanese machines — shops with tight tolerance requirements on large parts should evaluate the accuracy specification against their process needs
- 8,000 RPM standard spindle limits efficiency in high-speed aluminum machining — the 12,000 RPM option is recommended for shops with significant aluminum content in their product mix
- Large footprint (approximately 4,200 x 3,700 mm floor space) and 16,000 kg weight require careful facility planning, adequate crane access for installation, and a reinforced concrete foundation that may add to total installation cost
Best For
Frequently Asked Questions
01
The DNM 6700 Plus and DNM 750 II are both large-table VMCs in the DNM series. The DNM 6700 Plus is typically configured with a 670 mm Y-travel and somewhat lighter machine structure. The DNM 750 II's 762 mm Y-travel and larger table provide a meaningfully bigger work envelope for long parts and large fixture plates. Both share the DNM series' quality standards and global service network. Choose the DNM 750 II when workpiece or fixturing dimensions regularly approach or exceed the DNM 6700 Plus's capacity; choose the 6700 Plus when the 670 mm Y-travel is adequate and a slightly smaller footprint or lower price is preferred.
02
Yes. The DNM 750 II's large BT 50 table with 1,200 kg capacity is well-suited for tombstone-based production fixturing. Shops can mount a 4th-axis rotary unit with a tombstone to enable two- or four-face machining of multiple parts per setup, significantly improving spindle utilization. The machine's 30-tool (40-tool optional) ATC supports the tool variety needed for multi-operation tombstone programs. The 22 kW BT 50 spindle handles the interrupted cuts common in tombstone machining without the power limitations that smaller BT 40 spindles would impose on this approach.
03
The Doosan DNM 750 II requires approximately 4,200 x 3,700 mm of floor space including chip conveyor and operator access area. Overall machine height is approximately 3,400 mm. A reinforced concrete foundation pad is required — floor loading specifications should be confirmed with the local Doosan distributor based on the specific installation site's floor construction. Overhead crane or fork truck access with adequate hook height is required for installation due to the 16,000 kg machine weight. The Doosan distributor's applications team provides foundation drawings and installation planning support as standard practice.
04
The DNM 750 II is a single-table VMC without a native integrated pallet changer in the standard configuration. Doosan offers an optional 2-pallet automatic pallet changer (APC) for the DNM 750 II that enables unmanned part loading — the operator loads and unloads the pallet outside the machine guard while the machine cuts on the other pallet. The APC option significantly improves spindle utilization in production environments. For shops transitioning from manual operation to lights-out or unmanned production, the APC option is an important consideration at the time of machine purchase.
05
The standard control is Fanuc 0i-MF Plus, which provides reliable, proven CNC performance with access to Fanuc's comprehensive macro programming, canned cycle library, and widespread post-processor availability from all major CAM vendors. Siemens Sinumerik 828D is available as a mid-range option for shops in European and some Asian markets where Siemens dominates the control landscape. Siemens 840D sl is available for shops requiring the highest level of Siemens control capability, including full multi-axis interpolation and advanced surface quality control options. All control options are supported by Doosan's application engineering team.
Videos
Ellison Technologies
Machine Hub
Joe Reynolds
Gabriel Konyevalik
Surplex
Community Discussions
Troubleshooting and problem-solving — Need Help! DNM 750II Thru Spindle Coolant not purging. - CNCzone
Community discussion — Daewoo/Doosan - Page 2 - CNCzone
Maintenance and service — Just In Every Doosan Service Manual that I currently have ...
Maintenance and service — M code for coolant - CNCzone
Pricing and buying discussion — Spindle help on mill. Before you tell me to do the recovery ...Spindle warmup M102 : r/Machinists - RedditMachine brands : r/Machinists - RedditHelping the boss spend money : r/Machinists - RedditNew machine : r/Machinists - RedditNew machine day! Three DNM 4000s and
Community discussion — Spindle warmup M102 : r/Machinists - Reddit
Pricing and buying discussion — Machine brands : r/Machinists - Reddit
Pricing and buying discussion — Helping the boss spend money : r/Machinists - Reddit
Links to community discussions. Summaries are editorial — visit the original thread for full context.
