DMG Mori CTX 550

Specs verified 2026-10-02 · dmgmori.com Updated 2026-10-02

Image: dmgmori.com, DMG Mori

Key Specifications

X Travel

310 mm (12.2 in)

Y Travel

130 mm (5.1 in)

Z Travel

1,225 mm (48.2 in)

Max Spindle

3,250 rpm (main spindle ISM102)

Spindle Power

36 / 40 kW (100/40% DC)

Max Workpiece ⌀

480 mm (18.9 in)

How much does the DMG Mori CTX 550 cost?

Price estimate

Uncertain

We do not have a price for the DMG Mori CTX 550 that we can stand behind, so we show no number. Configuration, options and installation move the final price a long way: a quote is the reliable figure.

Overview

With 1,225 mm (48.2 in) of Z travel and a maximum workpiece length of the same 1,225 mm (48.2 in), the DMG MORI CTX 550 is the long-bed machine among the mid-size CTX models. Maximum workpiece diameter is 480 mm (18.9 in), X travel is 310 mm (12.2 in), and the Y-axis covers 130 mm (5.1 in) as a ±65 mm stroke.

Its main spindle is built for large bar and heavy shafts. The ISM102 integrated spindle has a hollow cylinder of Ø 102 mm, which matches the 102 mm (4 in) bar capacity in the table, and a drive rating of 36 / 40 kW (100 / 40% duty cycle). Top speed is 3,250 rpm. That is a low ceiling for small diameters: a slender part will not reach the surface speed that carbide tooling wants in aluminium or brass, so this is a lathe to choose for big stock, not for small bar.

Shaft work usually means turning both ends. The counter spindle DMG MORI describes is an ISM 65 integrated spindle motor, partially hollow at Ø 65 mm, with 13/14 kW and 5,500 rpm. It can grip a journal or a stub end up to that bore, and it is far lighter than the main spindle. Have the quotation show whether it and the star turret are included.

Milling comes from the turret. The optional DirectDrive turret drive runs up to 10,000 rpm with a 10/11 kW drive rating; the High Precision Turrets are prepared for 50 bar coolant pressure and a 100% duty cycle in milling. For loading, the CTX 550 has a 6-axis robot interface and is predisposed for Robo2Go, Robo2Go max and Matris.

The CTX 450 has the same X and Y travels with 825 mm (32.5 in) of Z. The CTX 750 is the next step in size: 435 mm (17.1 in) of X, 170 mm (6.7 in) of Y and 1,300 mm (51.2 in) or 2,050 mm (80.7 in) of Z.

Full Specifications

Parameter	Value
X-Axis Travel	310 mm (12.2 in)
Y-Axis Travel	130 mm (5.1 in)
Z-Axis Travel	1,225 mm (48.2 in)
Max Workpiece Diameter	480 mm (18.9 in)
Max Workpiece Length	1,225 mm (48.2 in)
Max Bar Capacity	102 mm (4 in)
Max Spindle Speed	3,250 rpm (main spindle ISM102)
Spindle Motor Power	36 / 40 kW (100/40% DC)
Spindle Nose	A2-8
Driven Tool Speed	Up to 10,000 rpm (optional DirectDrive turret drive)
Spindle Bore	Ø 102 mm (hollow cylinder, ISM102)
Sub Spindle Speed	5,500 rpm (counter spindle ISM 65)
Sub Spindle Power	13/14 kW (100%-40%ED), counter spindle ISM 65
Driven Tool Power	10/11 kW (100%-40%ED), optional DirectDrive turret drive
Coolant Pressure	Turrets ready for 50 bar coolant pressure

Specifications sourced from dmgmori.com — verified 2026-10-02

Strengths & Limitations

Strengths

1,225 mm (48.2 in) of Z travel and the same maximum workpiece length for shaft work
ISM102 main spindle with an Ø 102 mm hollow cylinder and a 36 / 40 kW drive rating
Bar capacity of 102 mm (4 in), matched by the spindle bore
6-axis robot interface, predisposed for Robo2Go, Robo2Go max and Matris
130 mm (5.1 in) Y-axis with direct measuring systems in X and Y as standard
Optional DirectDrive turret drive with up to 10,000 rpm and 10/11 kW

Limitations

Main spindle speed is limited to 3,250 rpm, which is slow for small-diameter parts
The ISM 65 counter spindle has 13/14 kW and an Ø 65 mm partial bore, much less than the 36 / 40 kW main spindle
The DirectDrive turret drive is optional, and the Highlights state no figures for the standard turret drive
X travel stays at 310 mm (12.2 in) and diameter at 480 mm (18.9 in); the CTX 750 has 435 mm (17.1 in) of X

Best For

Shafts up to 1,225 mm (48.2 in) long and 480 mm (18.9 in) in diameter Large bar up to 102 mm (4 in) through the ISM102 spindle Heavy turning that uses the 36 / 40 kW drive at low spindle speed Robot-loaded cells using the 6-axis robot interface

Frequently Asked Questions

01 How long a part can the CTX 550 turn?

The maximum workpiece length is 1,225 mm (48.2 in), equal to the Z travel. Maximum workpiece diameter is 480 mm (18.9 in). The CTX 450 uses the same X and Y travels with 825 mm (32.5 in) of Z, so the CTX 550 is the choice when parts are too long for it.

02 What is the main spindle of the CTX 550?

An integrated spindle, type ISM102, on an A2-8 nose with a hollow cylinder of Ø 102 mm. DMG MORI gives the drive rating as 36 / 40 kW (100 / 40% duty cycle) and the speed as 3,250 rpm. The spindle motor is water-cooled.

03 Is the CTX 550 suitable for small parts?

It will make them, but it is not sized for them. The main spindle stops at 3,250 rpm, so small diameters run at low surface speed, and the Ø 102 mm bore and 36 / 40 kW drive are aimed at large stock. The counter spindle is faster at 5,500 rpm, with 13/14 kW.

04 What automation is the CTX 550 prepared for?

DMG MORI lists a 6-axis robot interface and a predisposition for Robo2Go, Robo2Go max and Matris. The Highlights also name synchronous (IPM) motors and hydraulic pumps with inverter control as energy-saving features. No integrated unloading device is mentioned for this model.

05 Does the CTX 550 have direct measuring systems?

Direct measuring systems in the X-axis and Y-axis are standard. The C-axis is controlled by a measuring system on the front bearings, and the integrated spindle motors are water-cooled for thermal stability. The Highlights do not mention a direct measuring system for Z, which matters on a 1,225 mm (48.2 in) axis, so ask about it.