DMG Mori NEF 400

$120,000 – $185,000 Updated 2026-03-17

Key Specifications

Max. Turning Diameter

410 mm (16.1 in)

Max. Turning Length

1,000 mm (39.4 in)

Main Spindle Speed

3,500 rpm

Main Spindle Power

22 kW (30 hp)

Main Spindle Torque

430 Nm

Spindle Bore

65 mm

Overview

The DMG Mori NEF 400 is a high-performance universal CNC lathe designed for precision turning of medium to large workpieces in job shop and production environments. Built on a rigid cast iron bed with optimized ribbing, the NEF 400 delivers excellent damping characteristics and thermal stability essential for maintaining tight tolerances across extended machining cycles.

Equipped with a Siemens SINUMERIK 828D or FANUC 0i-TF control, the NEF 400 supports full conversational programming and integrates seamlessly into networked manufacturing cells. The machine's powerful main spindle delivers up to 22 kW and 3,500 rpm, making it suitable for both heavy roughing passes in steel and high-surface-finish finishing operations in aluminum and exotic alloys.

The NEF 400 features a 12-station turret with driven tool capability (when ordered with the live tooling option), enabling complete part machining in a single setup. The Y-axis option further expands off-center milling and drilling capability, reducing the need for secondary operations. Chip management is handled by a high-capacity conveyor, keeping the working area clean during long automated runs.

As a mid-range lathe in the DMG Mori portfolio, the NEF 400 targets automotive suppliers, aerospace subcontractors, and general machining shops that require a dependable, versatile turning center with a proven control ecosystem and strong global service support.

Full Specifications

Parameter	Value
Max. Turning Diameter	410 mm (16.1 in)
Max. Turning Length	1,000 mm (39.4 in)
Main Spindle Speed	3,500 rpm
Main Spindle Power	22 kW (30 hp)
Main Spindle Torque	430 Nm
Spindle Bore	65 mm
Chuck Size	250 mm (10 in)
Turret Stations	12
Driven Tool Speed (Optional)	4,000 rpm
Driven Tool Power (Optional)	5.5 kW
Rapid Traverse X / Z	24 / 30 m/min
Control	Siemens SINUMERIK 828D or FANUC 0i-TF
Machine Weight	Approx. 6,200 kg
Footprint (L × W)	3,850 × 1,760 mm

Specifications sourced from static.machinetools.com — verified 2026-03-28

Strengths & Limitations

Strengths

Rigid cast iron construction provides excellent vibration damping for consistent surface finishes
Available with live tooling and Y-axis for complete part machining in one setup
Choice of Siemens 828D or FANUC 0i-TF controls suits varied operator preferences
Strong DMG Mori global service network minimizes downtime
Generous spindle bore and chuck capacity accommodates a wide range of workpiece diameters

Limitations

Live tooling and Y-axis are costly options that significantly raise the base price
Heavier footprint compared to some competitor mid-range lathes requires substantial floor space
Control software licensing and update costs can add up over the machine's lifecycle

Best For

Automotive component suppliers turning shafts, flanges, and housings Aerospace subcontractors machining aluminum and titanium turned parts Job shops requiring a versatile lathe capable of both roughing and finishing Production environments needing reliable lights-out turning with bar feeder integration

Frequently Asked Questions

01 What is the maximum bar stock diameter the NEF 400 can handle?

The NEF 400 has a spindle bore of 65 mm, which accommodates bar stock up to approximately 51 mm in diameter when used with a standard bar feeder. Extended spindle bore options may be available through DMG Mori's configuration program.

02 Can the NEF 400 perform milling operations?

Yes, when optioned with the live tooling turret the NEF 400 can perform driven tool milling, drilling, and threading. Adding the optional Y-axis enables off-center features and eccentric machining, making single-setup complete part production possible.

03 Which CNC control comes standard on the NEF 400?

DMG Mori offers the NEF 400 with either a Siemens SINUMERIK 828D or a FANUC 0i-TF control. Buyers typically choose based on their existing control ecosystem or operator familiarity.

04 Is the NEF 400 suitable for lights-out machining?

Yes. The NEF 400 is compatible with a range of bar feeder systems and gantry loaders. Its robust construction and reliable turret indexing make it well suited to unattended production runs when properly tooled and fixtured.

05 How does the NEF 400 compare to the NEF 600?

The NEF 600 offers a larger swing diameter (up to 600 mm), a longer turning length, and a heavier spindle for machining larger workpieces. The NEF 400 is the better choice for shops primarily running medium-sized parts and wanting a smaller machine footprint.