DMG Mori GMX 400
This model was not found in DMG Mori's current lineup when we checked on 2026-10-02 (lineup page). It may be a superseded or older model; the specifications below are as we last recorded them.
Key Specifications
Spindle Taper
Spindle Power
Max Turn Length
Accuracy
max tool length
max tool diameter
How much does the DMG Mori GMX 400 cost?
Estimated price range
Our best estimate for a cnc grinding machine in this class — not a quote from DMG Mori. Configuration moves it a long way.
Overview
The DMG MORI GMX 400 is listed as a twin-spindle turning machine with a B-axis milling spindle: two turning spindles at 4,000 rpm, a 25.2 in maximum turning diameter, a 62.4 in maximum turning length and a 3.5 in maximum bar diameter. It is not in DMG MORI's current lineup, and the listed figures have not been confirmed by the manufacturer, so read them as a guide to what a used machine should have.
The milling side is a B-axis that swivels ±120 degrees, with an HSK63-A tool mount and a 12,000 rpm maximum spindle speed. Tools come from a 60-station shelf magazine. The listed tool exchange time is 1.3/2.6 s for the two tool weight classes of 6/10 lbs, with an average chip-to-chip time of 8 s. One 12 Position turret with VDI 40 tooling works alongside it, and rapid traverse is listed as 1,574/945/2,755 ipm in X, Y and Z.
Two things in the table need checking before anyone relies on it. Four power rows appear (60.3 hp, 29.5 hp, 15.7 hp and 15 kW (20.1 hp)) without saying which spindle each one describes. A group of tool-grinding rows, among them an HSK-E50 wheel mount and a 20 kg (44 lb) workpiece weight, does not agree with the turning figures either. On a machine listed at 44,000 lbs with an 88 kW power requirement, the nameplate and the original documentation are the references to trust.
Full Specifications
| Parameter | Value |
|---|---|
| Max Tool Length | 400 mm (15.7 in) |
| Max Tool Diameter (full magazine) | 300 mm (11.8 in) |
| Max Workpiece Weight | 20 kg (44 lb) |
| Grinding Spindle Speed | up to 12,000 RPM |
| Spindle Motor Power | 15 kW (20.1 hp) |
| Wheel Mount | HSK-E50 |
| Linear Axes | X, Y, Z |
| Rotary Axes | A, C (5-axis simultaneous) |
| Positioning Accuracy | < 0.003 mm (< 3 µm) |
| Automatic Wheel Changer | Yes (multi-pack) |
| Coolant System | High-pressure grinding coolant, filtration |
| CNC Control | Siemens Sinumerik 840D sl / NUMROTO |
| Number of Axis | 5-Axis |
| Tool Changer | 60 ATC |
| CNC Control | SIEMENS 840D |
| Spindle | 12,000 rpm |
| Spindle Taper | HSK-A63 |
| B Axis | +/- 120 degrees |
| Spindle Number | 2 |
| Turret Number | 1 |
| Spindle 1 | 4,000 rpm |
| Turret 1 | 12 Position |
| Spindle 2 | 4,000 rpm |
| Taper Type | VDI 40 |
| Swing Diameter | 25.2" |
| Max Turning Diameter | 25.2" |
| Max Turning Length | 62.4" |
| Drive Power | 60.3 hp |
| Max Speed | 4,000 rpm |
| Torque | 553.2 lb/ft |
| Torque C Axis | 442.5 lb/ft |
| Chuck Diameter | 7.9-15.7" |
| Chuck Currently on Main Spindle | SCHUNK ROTA THW plus 315-104 |
| Max Bar Diameter | 3.5" |
| Rapid Traverse Speed X Y Z | 1,574/945/2,755 ipm |
| Linear Drive Z1 | 1FN3900-3WB00 |
| Slide Travel X1 Y1 | 21.7"/+/-4.3" |
| Measuring Systems | absolute direct |
| Tool Mount | HSK63-A |
| Max Spindle Speed | 12,000 rpm |
| Max Drive Power | 29.5 hp |
| Max Torque | 553.2 lb/ft |
| Indexing of Spindle Axis | 1 Degrees |
| Swivel Travel B1 | Plus or minus 120 degrees |
| Resolution | 0.001 Degrees |
| Hydraulic Clamping | 1,475 lb/ft |
| Number of Tool Stations | Shelf 60 |
| Length Max Number | 7.9/1.5-13.8/29.5 |
| Tool Weight G1 G2 | 6/10 lbs |
| Tool Diameter Max with Pocket Empty | 80-140" |
| Tool Exchange Time G1 G2 | 1.3/2.6 s |
| Type of Tool Exchange | covered |
| Average Chip to Chip Time | 8 s |
| Volume | 264.2 gal. |
| Belt Filter Filter Fineness | 40 um |
| Pres Pump 1 Pump 2 Pump 3 with Cool Device | 8/20/80 bar |
| Shaft Diameter According to VDI Din 69880 | 1.6" |
| Max Power | 15.7 hp |
| Rapid Traverse Speed X Z | 945/1,574 ipm |
| Slide Travel X2 Z2 | 225/1,400" |
| Rapid Traverse Speed Z | 1,417 ipm |
| Feed Power S6 40 DC | 13 kN |
| Slide Travel Z3 | 59.1" |
| Setup Dimensions L H B | 366.1"/181.1"/120.1" |
| Gross Weight Including CNC | 44,000 lbs. |
| Processor Interface | Pentium III 1,2 GHz |
| Screen | 15"-TFT Screen |
| Power Requirement | 88 kW |
Specifications sourced from machinio.com — verified 2026-03-28
Strengths & Limitations
Strengths
- Two turning spindles, each listed at 4,000 rpm, so both ends of a part can be machined on one machine
- B-axis milling spindle that swivels ±120 degrees, with an HSK63-A tool mount and a 12,000 rpm maximum speed
- 60-station shelf magazine with a listed average chip-to-chip time of 8 s
- 25.2 in maximum turning diameter and 62.4 in maximum turning length, with a 3.5 in maximum bar diameter
- Coolant supply listed with pump pressures of 8/20/80 bar, a 40 um belt filter and a 264.2 gal. tank
Limitations
- Not in DMG MORI's current lineup, and the listed figures are unconfirmed: check them against the documentation of the actual machine
- The table mixes tool-grinding rows (HSK-E50 wheel mount, 20 kg (44 lb) workpiece weight) with turning rows that describe a much larger machine
- A 44,000 lbs gross weight and an 88 kW power requirement set the foundation, rigging and electrical supply needed
- The listed control hardware is dated: SIEMENS 840D with a Pentium III processor and a 15 in TFT screen
Best For
Frequently Asked Questions
01
No. The GMX 400 is not in DMG MORI's current lineup, and the figures listed for it are unconfirmed. Anyone assessing a used machine should work from its nameplate and original documentation. The listed control, a SIEMENS 840D with a 15 in TFT screen, is consistent with an older machine.
02
The listed maximum turning diameter is 25.2 in, the maximum turning length is 62.4 in and the maximum bar diameter is 3.5 in. Chuck diameter is listed as 7.9-15.7 in. The table also carries a 20 kg (44 lb) workpiece weight row that sits with its tool-grinding rows and does not fit these turning figures, so confirm the weight limit separately.
03
The listed figures show a B-axis that swivels ±120 degrees, an HSK63-A tool mount and a 12,000 rpm maximum spindle speed. Tools are held in a 60-station shelf magazine, with an average chip-to-chip time of 8 s. There is also one 12 Position turret with VDI 40 tooling.
04
The listed gross weight including the CNC is 44,000 lbs and the power requirement is 88 kW. Setup dimensions are given as 366.1/181.1/120.1 in (L/H/B). The coolant tank volume is 264.2 gal., so allow for the filled tank and for coolant handling when planning the floor space.
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