DMG Mori NT 4250 DCG

$450,000 - $700,000 Updated 2026-03-13

Key Specifications

Weight

16,000 kg (35,274 lb)

Rapid Traverse

40 m/min (1,575 ipm)

Max Turn Length

1,000 mm (39.4 in)

max turning diameter

700 mm (27.6 in)

max x axis travel

610 mm (24 in)

max y axis travel

300 mm (11.8 in) / +/-150 mm

Overview

The DMG Mori NT 4250 DCG is the entry model in the NT DCG series of heavy-duty turn-mill centers, designed for large-part complete machining where rigidity and power take priority over compactness. The DCG (Driven at the Center of Gravity) designation refers to the proprietary box-in-box construction where the ball screw drives through the center of gravity of each axis, eliminating pitching moment during acceleration for superior dynamic accuracy.

The main spindle delivers 30 kW (40 hp) at 3,500 RPM with 630 Nm of torque through a 12-inch chuck. The optional sub-spindle provides 22 kW (30 hp) at 5,000 RPM. Bar capacity is 80 mm (3.1 in). The turn-mill spindle runs at 12,000 RPM with 18.5 kW (25 hp) through an HSK-A63 interface. The B-axis swivels through 240 degrees (plus/minus 120 degrees) via Direct Drive Motor.

Axis travels are 610 mm (24 in) in X, 300 mm (11.8 in) in Y (plus/minus 150 mm), and 1,110 mm (43.7 in) in Z. Maximum turning diameter is 700 mm (27.6 in) with a turning length of 1,000 mm (39.4 in). Rapids hit 40 m/min. The standard tool magazine holds 40 stations, expandable to 80. An optional lower turret adds parallel processing capability.

Control is Fanuc 31iB5 with MAPPS. The DCG construction with box-in-box design gives this machine noticeably better dynamic accuracy than conventional slide designs, especially important during acceleration and deceleration in simultaneous 5-axis work. The machine weighs approximately 16,000 kg (35,274 lb). Pricing starts around $450,000 with production configs running $550,000-$700,000.

Specs sourced from DMG Mori published data and dealer documentation.

Full Specifications

Parameter	Value
Max Turning Diameter	700 mm (27.6 in)
Max Turning Length	1,000 mm (39.4 in)
Max X Axis Travel	610 mm (24 in)
Max Y Axis Travel	300 mm (11.8 in) / +/-150 mm
Max Z Axis Travel	1,110 mm (43.7 in)
Bar Capacity	80 mm (3.1 in)
Chuck Size	12 in (305 mm)
Main Spindle Speed	3,500 RPM
Main Spindle Power	30 kW (40 hp)
Main Spindle Torque	630 Nm
Sub Spindle Speed	5,000 RPM (optional)
Sub Spindle Power	22 kW (30 hp) (optional)
Turn Mill Spindle Speed	12,000 RPM
Turn Mill Spindle Power	18.5 kW (25 hp)
Turn Mill Spindle Interface	HSK-A63
B Axis Swivel	+/-120 deg (240 deg total), Direct Drive Motor
Tool Magazine	40 standard / 80 optional
Lower Turret	Optional with driven tools
Rapid Traverse Rate	40 m/min (1,575 ipm)
CNC Control	Fanuc 31iB5 with MAPPS
Construction	DCG (Driven at Center of Gravity) box-in-box
Machine Weight	16,000 kg (35,274 lb)
Floor Space	4,200 x 2,900 mm
660 Mm	26 in.
1542 Mm	60.7 in.
80 Mm	3.1 in.
750 Mm	29.5 in.
420 Mm	16.5 in.
1650 Mm	65 in.
Customer Benefits	MPC Graph: aktuelle und angelernte Prozesswerte. / MPC Diagnostics: Lagerzustand, Anzahl von Stoß und Crash.

Specifications sourced from us.dmgmori.com — verified 2026-03-28

Strengths & Limitations

Strengths

DCG box-in-box construction drives through the center of gravity of each axis, eliminating pitching moment for superior dynamic accuracy during 5-axis work
700 mm turning diameter and 1,000 mm length cover a wide range of mid-to-large precision components in a single setup
40-tool standard magazine (80 optional) with lower turret option supports complex parts with parallel processing capability
18.5 kW turn-mill spindle at 12,000 RPM with HSK-A63 delivers genuine milling performance on large workpieces
30 kW / 630 Nm main spindle handles heavy roughing in tough steels and superalloys without stalling
300 mm Y-axis travel provides excellent off-center milling reach for complex features on large-diameter parts
Fanuc 31iB5 control is well-supported by all major CAM vendors and familiar to most experienced CNC operators

Limitations

Starting at $450K, the DCG premium over conventional designs needs to be justified by accuracy and surface finish requirements
3,500 RPM main spindle speed limits high-speed turning on smaller diameters; the machine is optimized for heavy cutting
16,000 kg weight requires substantial foundations and rigging logistics adding $15,000-$25,000 to installed cost
1,000 mm maximum turning length is shorter than the NTX 2000 (1,538 mm) or CTX beta 1250 TC (1,250 mm) for shaft work
DCG construction adds manufacturing cost that shows up in the price premium versus non-DCG alternatives

Best For

Aerospace manufacturers needing superior dynamic accuracy on complex turned-and-milled flight components Precision equipment producers where the DCG advantage in surface finish and geometric accuracy justifies the premium Defense contractors machining precision cylindrical components with tight tolerance requirements during 5-axis work Die and mold shops running complex contour work where dynamic accuracy during acceleration matters for surface finish Shops upgrading from conventional turn-mill centers where pitching-induced surface marks are a quality issue

Frequently Asked Questions

01 What does a DMG Mori NT 4250 DCG cost?

A new NT 4250 DCG starts around $450,000. Adding the sub-spindle, lower turret, expanded 80-tool magazine, and automation pushes to $550,000-$700,000.

02 What does DCG mean and why does it matter?

DCG stands for Driven at the Center of Gravity. The ball screw drives through the center of gravity of each axis slide, eliminating the pitching moment that occurs during acceleration and deceleration in conventional designs. This translates to better surface finish, tighter geometric accuracy, and improved contouring performance during simultaneous 5-axis work.

03 How does the NT 4250 DCG compare to the NTX 2000?

The NT 4250 DCG has the DCG construction advantage for dynamic accuracy, larger turning diameter (700 mm vs 670 mm), and more torque (630 vs 230 Nm). The NTX 2000 has longer Z-axis travel (1,562 vs 1,110 mm) and a more compact footprint. Choose the NT for accuracy; the NTX for longer parts.

04 What is the difference between the NT 4250 DCG and the NT 4300 DCG?

The NT 4300 DCG has more powerful spindles, longer Z-axis travel, and a larger work envelope. The NT 4250 DCG is the more compact and affordable entry point to DCG turn-mill technology.