DMG Mori GM 20|6
Image: dmgmori.com, DMG Mori
Key Specifications
X Travel
Z Travel
Max Spindle
Max Workpiece ⌀
max workpiece length
max bar capacity
How much does the DMG Mori GM 20|6 cost?
Estimated price range
Our best estimate for a multi-spindle automatic in this class — not a quote from DMG Mori. Configuration moves it a long way.
Overview
The DMG MORI GM 20|6 is a multi-spindle automatic lathe for components up to 25 mm (1 in) in diameter and 100 mm (3.9 in) in length, made for medium and large-scale production. Its slides travel 42 mm (1.7 in) in X and 50 mm (2 in) in Z, and spindle speeds reach up to 5,000 rpm.
Against the GM 16|6 it is the bigger machine in every listed dimension. The GM 16|6 stops at 16 mm bar and 80 mm (3.1 in) of workpiece length, with 28 mm (1.1 in) of X and 45 mm (1.8 in) of Z. The extra X stroke is the practical gain: 42 mm against the 28 mm of the GM 16|6 gives form tools and cross slides room to approach a 25 mm part and still clear it.
The minimum cycle time is adjustable to under 1.4 seconds, and that figure applies to double drop production too. A cycle that short assumes long runs of one part. Every station has independent, stepless adjustment of its working stroke, which shortens the fine-tuning after a tool change, and four compound-rest slides take the radial and straight turning.
DMG MORI describes the construction as a frame or portal design with overhead bracing, intended to keep distortion under cutting load small and to damp vibration through the bed, the main spindle and the front-working tool carrier. Parts are worked from the front, which removes the need for angle tools, and the front-working tools run on the central block. Spindle bearings are oil-cooled throughout.
One point to settle with DMG MORI: the model designation reads 20, while the technical data lists 25 mm (1 in) for both bar capacity and workpiece diameter. Confirm which spindle and collet size the quoted machine carries. The MULTISPRINT 36, with 50 mm (2 in) of X, 100 mm (3.9 in) of Y and 170 mm (6.7 in) of Z, is a larger machine with a Y travel in its table.
Full Specifications
| Parameter | Value |
|---|---|
| X-Axis Travel | 42 mm (1.7 in) |
| Z-Axis Travel | 50 mm (2 in) |
| Max Workpiece Diameter | 25 mm (1 in) |
| Max Workpiece Length | 100 mm (3.9 in) |
| Max Bar Capacity | 25 mm (1 in) |
| Spindle Bearing Cooling | Oil cooling of all spindle bearings |
| Max Spindle Speed | Up to 5,000 rpm |
| Cycle Time Min | Under 1.4 seconds (adjustable minimum), also for double drop production |
| Compound Slides | Four compound-rest slides for radial or straight turning |
Specifications sourced from dmgmori.com — verified 2026-10-02
Strengths & Limitations
Strengths
- Takes components up to 25 mm (1 in) in diameter and 100 mm (3.9 in) long
- Minimum cycle time adjustable to under 1.4 seconds, also for double drop production
- Spindle speeds of up to 5,000 rpm for bar up to 25 mm (1 in)
- Workpieces are machined from the front, so no angle tools are required
- Stepless, independent working-stroke adjustment in all stations, plus four compound-rest slides
- Frame or portal construction with overhead bracing for rigidity and damping
Limitations
- X travel of 42 mm (1.7 in) and Z travel of 50 mm (2 in) keep the machine to compact turned geometry
- Workpiece length tops out at 100 mm (3.9 in), twice the 50 mm (2 in) Z travel, so confirm how the longest parts are produced
- A maximum of 5,000 rpm limits cutting speed on the smallest diameters
- The travel table lists X and Z only; the MULTISPRINT 36 lists 100 mm (3.9 in) of Y as well
- No spindle power or control is stated on DMG MORI's page for this model
Best For
Frequently Asked Questions
01
Components up to 25 mm (1 in) in diameter and up to 100 mm (3.9 in) long, from bar of up to 25 mm (1 in). Slide travels are 42 mm (1.7 in) in X and 50 mm (2 in) in Z.
02
DMG MORI gives an adjustable minimum cycle time of under 1.4 seconds and states that it also applies to double drop production. Spindle speeds go up to 5,000 rpm. The cycle a real part achieves is set by its slowest station.
03
It is larger. The GM 20|6 has 42 mm (1.7 in) of X and 50 mm (2 in) of Z for parts up to 25 mm (1 in) and 100 mm (3.9 in) long. The GM 16|6 has 28 mm (1.1 in) of X and 45 mm (1.8 in) of Z for 16 mm bar and parts up to 80 mm (3.1 in) long.
04
Four compound-rest slides do radial or straight turning. Front-working tools are guided on the central block and machine the part from the front, so angle tools are not needed. The working stroke is adjusted independently and steplessly in every station.
