DMG Mori DMU 20 Linear
Image: dmgmori.com, DMG Mori
Key Specifications
X Travel
Y Travel
Z Travel
Max Spindle
Spindle Taper
Max Workpiece ⌀
How much does the DMG Mori DMU 20 Linear cost?
Estimated price range
Our best estimate for a 5-axis machining center in this class — not a quote from DMG Mori. Configuration moves it a long way.
Overview
The DMG MORI DMU 20 linear is a very small 5-axis machining center for precision parts: travels of 220 × 370 × 290 mm (8.7 × 14.6 × 11.4 in), a workpiece envelope of Ø 220 mm × 283 mm (8.7 × 11.1 in) and a table load of 15 kg (33.1 lb). All three linear axes have linear drives, and spindle speeds reach a maximum of 60,000 rpm.
Those figures describe a machine for small tools and small parts. A 15 kg limit has to cover the workpiece together with its clamping, which rules out vises and chucks of ordinary size; plan on compact, purpose-made fixtures. In return, linear drives move a light part quickly through the short reversals that 5-axis finishing with small cutters consists of. Positioning accuracy is stated as 3 µm as standard. DMG MORI ties that to wider linear guides, a cast bed, temperature management and a gantry design built on a thermally symmetric layout.
For 5-sided and simultaneous work the A-axis swivels from +130° to -93°, a range wide enough on both sides to bring undercut features in front of the tool. The C-axis runs at 150 rpm as standard, and 1,500 rpm is optional.
The spindles are high-frequency units from FISCHER. An HSK-32 spindle is standard, and the 60,000 rpm maximum belongs to an optional HSK-32 spindle. HSK-40 spindles are optional too, one of them also available with shaft cooling and one with lifetime grease lubrication. The interface decides how large a tool shank the machine accepts, so settle it before buying tooling. For larger work, the DMU 40 eVo has 400 × 400 × 375 mm (15.7 × 15.7 × 14.8 in) of travel.
Full Specifications
| Parameter | Value |
|---|---|
| Max Workpiece Diameter | 220 mm (8.7 in) |
| Max Workpiece Height | 283 mm (11.1 in) |
| Max Workpiece Weight | 15 kg (33.1 lb) |
| X-Axis Travel | 220 mm (8.7 in) |
| Y-Axis Travel | 370 mm (14.6 in) |
| Z-Axis Travel | 290 mm (11.4 in) |
| Max Spindle Speed | max. 60,000 rpm |
| Spindle Taper | HSK-32 as standard; HSK-40 optional |
| A Axis Swivel | +130° to -93° |
| Positioning Accuracy | 3 µm standard |
| C Axis Speed | 150 rpm standard; 1,500 rpm optional |
| Axis Drives | Linear drives on all three linear axes |
Specifications sourced from dmgmori.com — verified 2026-10-02
Strengths & Limitations
Strengths
- Linear drives on all three linear axes
- 3 µm positioning accuracy as standard
- Spindle speeds up to a maximum of 60,000 rpm with an optional HSK-32 high-frequency spindle
- A-axis swivel range from +130° to -93° for 5-sided and simultaneous machining
- C-axis at 150 rpm as standard, with 1,500 rpm available as an option
- Choice of HSK-32 and HSK-40 spindles, including an HSK-40 version with shaft cooling
Limitations
- Table load is 15 kg (33.1 lb) at most, and the fixture has to fit inside that figure
- X travel is only 220 mm (8.7 in), and the part diameter is limited to the same 220 mm
- The 60,000 rpm spindle and the 1,500 rpm C-axis are options, not part of the standard machine
- HSK-32 and HSK-40 interfaces restrict the machine to small tool shanks
- No spindle power or torque figure is given in DMG MORI's listed data
Best For
Frequently Asked Questions
01
Up to 220 mm (8.7 in) in diameter and 283 mm (11.1 in) in height, with a maximum weight of 15 kg (33.1 lb). The travels are 220 mm (8.7 in) in X, 370 mm (14.6 in) in Y and 290 mm (11.4 in) in Z.
02
DMG MORI lists high-frequency spindles from FISCHER with a maximum of 60,000 rpm. An HSK-32 spindle is standard. Options are an HSK-32 spindle that reaches the 60,000 rpm maximum and two HSK-40 spindles, one of which is also available with shaft cooling and one of which is lifetime grease lubricated.
03
DMG MORI states 3 µm positioning accuracy as standard and attributes it to wider linear guides. The other measures listed are a cast bed optimised by FEM for long-term stability, temperature management and a gantry design with a thermally symmetric layout.
04
The A-axis has a swivel range of +130° to -93° with a maximum table load of 33 lb. The C-axis turns at 150 rpm in the standard version, and a 1,500 rpm C-axis is optional.
05
Among the nearby models, the DMU 40 eVo has travels of 400 × 400 × 375 mm (15.7 × 15.7 × 14.8 in), against 220 × 370 × 290 mm (8.7 × 14.6 × 11.4 in) on the DMU 20 linear. It is the step to take when parts outgrow the 220 mm diameter limit.
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