DN Solutions DBC 250 L II

$800,000 - $1,200,000 Updated 2026-03-19

Key Specifications

Max Spindle

6,000 RPM

Spindle Taper

ISO 50

Table Size

1,800 x 1,600 mm (71 x 63 in)

Rapid Traverse

10 m/min (394 in/min)

Spindle Power

30 kW (40 hp)

x axis travel

4,000 mm (157 in)

Overview

The DN Solutions DBC 250 L II is a large-capacity horizontal boring mill built for shops that regularly tackle oversized castings, weldments, and structural components. It's the extended-travel version of the DBC series, and the numbers tell the story: 4,000 mm X-axis travel, 2,500 mm Y, and a full 2,000 mm of Z-axis reach. That's enough envelope to bore, face, and contour workpieces that smaller machines simply can't touch.

The spindle runs an ISO 50 taper at 6,000 RPM with 30 kW of power and 600 Nm of torque. That's a notably high-speed spindle for a boring mill of this class, and it gives the DBC 250 L II flexibility that older, slower-spindle boring mills lack. You can bore large-diameter holes with conventional tooling, then switch to high-speed face milling without moving the part to a different machine. The 15,000 kg table load capacity handles heavy castings without concern.

DN Solutions designed the DBC 250 L II around a compact footprint relative to its working envelope, which matters when you're planning a shop layout around a machine that weighs 48,000 kg. The servo-driven automatic tool changer keeps cycle times down during multi-operation jobs. The high-rigidity column and bed construction minimizes deflection during heavy boring cuts, which is where boring mills either prove themselves or fall short. For shops doing energy, mining, heavy equipment, or general heavy fabrication work, this machine covers a wide range of large-part operations in a single setup.

Full Specifications

Parameter	Value
X Axis Travel	4,000 mm (157 in)
Y Axis Travel	2,500 mm (98 in)
Z Axis Travel	2,000 mm (79 in)
Max Spindle Speed	6,000 RPM
Spindle Motor Power	30 kW (40 hp)
Spindle Torque	600 Nm (443 ft-lb)
Spindle Taper	ISO 50
Table Size	1,800 x 1,600 mm (71 x 63 in)
Table Load Capacity	15,000 kg (33,069 lb)
Rapid Traverse Rate	10 m/min (394 in/min)
Machine Length	9,970 mm (393 in)
Machine Height	5,570 mm (219 in)
Machine Width	8,040 mm (317 in)
Machine Weight	48,000 kg (105,822 lb)
X Axis Travel Distance	4000 mm
Y Axis Travel Distance	2500 mm
Z Axis Travel Distance	2000 mm
Metric	IMPERIAL
Travels	X-Axis Travel DistanceY-Axis Travel DistanceZ-Axis Travel Distance
Feed Rates	X-Axis Rapid TraverseY-Axis Rapid TraverseZ-Axis Rapid Traverse
Main Spindle	Max. Spindle SpeedMax. Spindle PowerMax. Spindle TorqueTool Taper
Table	Table LengthTable WidthMaximum Workpiece weight
Dimensions	LengthHeightWidthWeight
Favorites	DBC 250L II

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

Strengths & Limitations

Strengths

6,000 RPM spindle is significantly faster than typical boring mills in this class, enabling high-speed face milling alongside traditional boring operations
4,000 mm X-axis and 2,000 mm Z-axis travel covers extremely large workpieces in a single setup, eliminating repositioning
15,000 kg table load capacity handles the heaviest castings and weldments without accuracy concerns
Compact footprint relative to the working envelope saves valuable shop floor space
Servo-driven ATC minimizes tool change downtime during multi-operation boring and milling cycles
High-rigidity column and bed construction ensures minimal deflection during heavy interrupted cuts

Limitations

48,000 kg machine weight requires substantial foundation preparation and may need specialized rigging for installation
Large footprint still demands significant floor space despite being compact for its class
Lead times on large boring mills can stretch to 6-12 months depending on configuration
ISO 50 tooling inventory is expensive to build out compared to 40-taper shops

Best For

Heavy equipment manufacturers boring and milling large castings, housings, and structural weldments Energy sector shops machining turbine casings, valve bodies, and pump housings Job shops specializing in oversized contract machining that need a versatile boring and milling platform Mining and construction equipment manufacturers requiring extended-travel boring capability Shipbuilding and marine shops machining engine blocks, gear housings, and structural components

Frequently Asked Questions

01 What does the DN Solutions DBC 250 L II cost?

New DBC 250 L II horizontal boring mills typically run $800,000-$1,200,000 depending on configuration, accessories, and tooling packages. Used Doosan-era DBC machines can be found for $400,000-$700,000. Pricing varies significantly based on rotary table options and probing packages.

02 How does the DBC 250 L II compare to the DBC 130 L II?

The DBC 250 L II shares the same travel envelope (4,000 x 2,500 x 2,000 mm) but features a 6,000 RPM spindle versus 3,000 RPM on the 130 L II. The 250 L II spindle produces 600 Nm versus 3,383 Nm on the 130 — it trades raw torque for speed. Choose the 250 L II when you need high-speed milling capability alongside boring; pick the 130 L II for maximum heavy-cutting torque.

03 What workpiece sizes can the DBC 250 L II handle?

With 4,000 x 2,500 x 2,000 mm of travel and a 15,000 kg table capacity, the DBC 250 L II handles workpieces up to roughly 1,800 x 1,600 mm on the table surface. It's sized for large castings, gear housings, turbine casings, and similar oversized components common in energy, mining, and heavy equipment manufacturing.

04 What control does the DBC 250 L II run?

The DBC 250 L II typically ships with a Fanuc 0i or 31i control, depending on configuration. Both are well-supported and familiar to most CNC operators.