DMG Mori HSC 70 linear
Key Specifications
X / Y / Z Travel
Table Size
Max. Table Load
Main Spindle Speed
Spindle Power
Spindle Torque
Overview
The DMG Mori HSC 70 linear is a high-speed vertical machining center featuring linear drive technology on all three primary axes, delivering acceleration values and positioning speeds that conventional ball-screw machines cannot match. Designed for high-speed cutting (HSC) of hardened tool steel, graphite, aluminum, and non-ferrous materials, the HSC 70 linear is a benchmark platform for mold and die production and high-precision parts manufacturing.
Linear motors eliminate the mechanical compliance and backlash inherent in ball-screw systems, resulting in dramatically higher axis dynamics — up to 1g acceleration — and superior contouring accuracy at high feed rates. This translates directly to better surface finish on complex contoured mold cavity surfaces and significantly shorter cycle times on parts requiring dense, high-feed finishing passes.
The HSC 70 linear's working envelope of 750 x 600 x 450 mm accommodates a wide range of mold and die inserts as well as precision structural components. The 42,000 rpm motorized spindle (standard) enables extremely fine step-down milling with small-diameter tooling, producing mirror-quality finishes on hardened cavity surfaces that minimize or eliminate polishing time downstream.
Temperature management is central to the HSC 70 linear's design. Linear motors generate heat, which the machine manages through an integrated cooling system that maintains the direct drive components and structural elements within tight thermal bounds. This, combined with DMG Mori's thermal compensation algorithms in the SINUMERIK ONE control, ensures that the machine maintains its exceptional geometric accuracy even during extended high-speed production cycles.
Full Specifications
| Parameter | Value |
|---|---|
| X / Y / Z Travel | 750 / 600 / 450 mm |
| Table Size | 850 × 650 mm |
| Max. Table Load | 600 kg |
| Main Spindle Speed | 42,000 rpm |
| Spindle Power | 25 kW |
| Spindle Torque | 20 Nm |
| Spindle Taper | HSK-E40 |
| Axis Drive System | Linear motors (X, Y, Z) |
| Rapid Traverse (X / Y / Z) | 90 m/min |
| Acceleration (X / Y / Z) | 1 g |
| Tool Magazine Capacity | 30 tools (60 optional) |
| Positioning Accuracy (ISO 230-2) | 0.003 mm |
| Control | Siemens SINUMERIK ONE / DMG Mori CELOS |
| Machine Weight | Approx. 11,500 kg |
Specifications sourced from us.dmgmori.com — verified 2026-03-28
Strengths & Limitations
Strengths
- Linear drive technology delivers up to 1g acceleration for dramatically faster cycle times on complex HSC programs
- 42,000 rpm spindle enables mirror-quality finishes in hardened steel with micro-diameter tooling
- No ball-screw backlash means superior contouring accuracy at high feed rates for mold cavity work
- Large 750 x 600 mm working envelope handles most mold inserts and precision structural parts
- Integrated thermal management maintains geometric accuracy during extended high-speed production runs
Limitations
- Very high purchase price — linear drive technology carries a significant premium over ball-screw VMCs
- HSK-E40 spindle taper limits heavy-duty roughing capability; this machine is optimized for finishing, not bulk material removal
- Linear motor maintenance and repair requires specialized technicians and can be costly
Best For
Frequently Asked Questions
01
Linear motors eliminate the mechanical compliance, backlash, and wear inherent in ball-screw drive systems. This allows the machine to achieve up to 1g acceleration, 90 m/min rapid traverse, and superior contouring accuracy at high feed rates — capabilities that ball-screw machines cannot match. For high-speed finishing of complex mold surfaces, this results in better finish quality and shorter cycle times.
02
The HSC 70 linear uses an HSK-E40 spindle interface. This taper is optimized for very high spindle speeds and small-diameter tooling. It provides the balance and stiffness required at 42,000 rpm with the fine tooling used in HSC finishing operations. Heavy roughing with large-diameter tools is not the primary application for this machine.
03
Yes. The HSC 70 linear is designed specifically for high-speed finishing of hardened tool steels up to 60+ HRC using carbide or CBN tooling with high spindle speeds and light chip loads. This allows direct hard milling of mold cavities to near-finished dimensions, reducing or eliminating EDM and manual polishing operations.
04
The HSC 70 linear incorporates an integrated cooling system that circulates chilled coolant through channels adjacent to the linear motor components and key structural elements. Temperature sensors feed data to the SINUMERIK ONE control, which applies active thermal compensation to maintain dimensional accuracy despite the heat generated by high-speed linear drive operation.
05
Yes. The 42,000 rpm spindle and high axis dynamics make the HSC 70 linear extremely productive for aluminum aerospace structural components and thin-wall parts. The machine's accuracy and surface finish capability at high feed rates makes it ideal for production of complex aluminum details that require excellent surface finish without secondary hand-finishing.
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