DMG Mori DMU 55 h twin

$600,000 - $800,000 Updated 2026-03-19

Key Specifications

X Travel

580 mm (22.8 in) per spindle

Y Travel

750 mm (29.5 in) per spindle

Z Travel

500 mm (19.7 in) per spindle

Max Spindle

14,000 RPM

Spindle Taper

HSK-A63

Tool Capacity

Up to 214 tools per spindle

Overview

The DMG Mori DMU 55 h twin is a twin-spindle horizontal 5-axis machining center that doubles productivity by running two independent spindles on a shared machine bed. Unlike the DMC 55 H twin which uses a twin-pallet concept, the DMU 55 h twin pairs two complete 5-axis spindle assemblies so both can cut simultaneously on separate workpieces, effectively delivering two machines' output from a single footprint.

Travel per spindle measures 580 x 750 x 500 mm (22.8 x 29.5 x 19.7 in) with full 5-axis simultaneous capability through swivelling rotary tables. Maximum workpiece dimensions reach 630 mm (24.8 in) diameter, 570 mm (22.4 in) height, and 750 mm (29.5 in) length at 400 kg (882 lb) per station. The GGG60 cast iron construction provides the rigidity needed for simultaneous dual-spindle cutting without cross-talk between spindle assemblies.

Each spindle supports up to 214 tools with a chip-to-chip change time of 2.9 seconds. Acceleration reaches 7/10/8 m/s² on X/Y/Z axes respectively, enabling fast repositioning for complex 5-axis contouring. The spindle synchronization technology (Syncmot) coordinates both spindles for balanced cutting operations. Positioning accuracy is 5 µm.

The DMU 55 h twin targets high-volume production environments where spindle utilization and parts-per-shift metrics drive profitability. It competes with dedicated twin-spindle solutions from Heller and Grob in the aerospace and automotive production 5-axis segment. The horizontal configuration ensures chips fall away from both cutting zones. Compatible with CELOS X digitization platform and MX Machining integration. New machines price between $600,000 and $800,000. Specs sourced from DMG Mori published data.

Full Specifications

Parameter	Value
X-Axis Travel	580 mm (22.8 in) per spindle
Y-Axis Travel	750 mm (29.5 in) per spindle
Z-Axis Travel	500 mm (19.7 in) per spindle
Spindle Count	2 (twin independent spindles)
Max Spindle Speed	14,000 RPM
Spindle Taper	HSK-A63
Spindle Motor Power	25 kW (34 hp) per spindle
Spindle Torque	87 Nm (64 ft-lb) per spindle
Max Workpiece Diameter	630 mm (24.8 in)
Max Workpiece Height	570 mm (22.4 in)
Max Work Weight	400 kg (882 lb) per station
Tool Capacity	Up to 214 tools per spindle
Tool Change Time	2.9 sec chip-to-chip
Acceleration	7 / 10 / 8 m/s² (X/Y/Z)
Positioning Accuracy	5 µm
Machine Weight	20,000 kg (44,092 lb)
CNC Control	SIEMENS SINUMERIK ONE (CELOS X)
580 Mm	22.8 in.
750 Mm	29.5 in.
500 Mm	19.7 in.
630 Mm	24.8 in.
570 Mm	22.4 in.
400 Kg	881.8 lbs.
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

Twin independent spindles deliver double the output of a single-spindle machine from one footprint and one operator
Up to 214 tools per spindle eliminates tool magazine limitations for complex multi-operation aerospace parts
Horizontal spindle orientation provides gravity-assisted chip evacuation for both cutting zones simultaneously
GGG60 cast iron construction isolates spindle assemblies to prevent vibration cross-talk during simultaneous cutting
Syncmot spindle synchronization coordinates both spindles for balanced production cycles
5-axis simultaneous capability on each spindle handles complex geometry without compromise

Limitations

Starting at $600K, the investment requires high production volumes to justify over two separate machines
400 kg per-station workpiece limit constrains part size compared to single-spindle horizontal platforms
500 mm Z-travel per spindle is modest for deep-cavity work on larger components
Twin-spindle complexity increases maintenance requirements and potential downtime impact

Best For

Aerospace production cells machining matched pairs of structural components or brackets at high volume Automotive manufacturers running high-volume complex 5-axis parts where spindle utilization drives cost-per-part Medical device manufacturers producing high-volume implants and instruments requiring 5-axis horizontal machining Production environments where floor space constraints make twin-spindle output-per-square-meter critical Shops running lights-out production where maximizing output from a single machine footprint drives ROI

Frequently Asked Questions

01 What does a DMU 55 h twin cost?

New machines price $600,000-$800,000 depending on spindle specification, tool magazine size, and automation options. The investment effectively replaces two separate 5-axis machines.

02 DMU 55 h twin vs DMC 55 H twin -- what is the difference?

The DMU 55 h twin has two independent spindles cutting simultaneously on separate workpieces. The DMC 55 H twin uses twin pallets with a single spindle -- one part cuts while the other loads. The DMU twin doubles throughput; the DMC twin maximizes single-spindle utilization.

03 Can each spindle run different programs?

Yes. Each spindle operates independently with its own tool magazine and 5-axis kinematics. They can run different programs, different parts, or identical programs for matched-pair production.

04 How does maintenance differ from a single-spindle machine?

Two complete spindle assemblies mean two sets of bearings, drives, and rotary axes to maintain. However, DMG Mori designs the twin for synchronized maintenance intervals. Downtime on one spindle does not necessarily stop the other.