09/10/2018|IMTS 2018 - US premiere: DMU 340 Gantry

The new standard in the gantry field: powerful, dynamic, compact and universally applicable

Intelligent large component machining with CELOS for aerospace, mechanical engineering and die & mould – the DMU 340 Gantry impresses with its top gantry design.

  • Stable: One-piece, thermo-symmetrical machine bed of EN-GJS-600 for maximum rigidity and accuracy
  • Dynamic: Wear-free, highly dynamic linear drives in the X- and Y-axis with up to 0.5 g and 3,543.3 in/min rapid traverse (optional), ram with integrated C-axis as direct drive for highest dynamics in 5-axis simultaneous machining
  • Modular: Expandable to 236.2 in. in the X-axis and 59.1 in. in the Z-axis
  • Flexible: B-axis milling head with direct drive and 50° swivel plane for the machining of angles up to -10°
  • Powerful: Extensive range of spindle modules with HSK-A100 motor spindles up to 317.2 ft lbs
  • Intelligent: CELOS for simplest operation, holistic integration into the company organization and continuous IoT performance


For Markus Piber, Divisional Board Member Sales & Technology Excellence of the DMG MORI Management GmbH, the new DMU 340 Gantry is the impressive result of an in-depth liaison with the large component manufacturers from the aerospace industry, general mechanical engineering as well as tool and mold manufacturing. And he is convinced: “With its high performance, dynamics, compactness and universality, the DMU 340 Gantry is the new benchmark in the gantry field.” The work area of the DMU 340 ­Gantry measures 133.9 x 110.2 x 49.2 inches and provides expansion options to up to 236.2 inches in the X- and 59.1 inches in the Z-axis. Due to its gantry design, it also has compact dimensions. Direct drives in the B- and C-axis as well as linear drives in the X- and Y-axis enable dynamic 5-axis simultaneous machining of workpieces – primarily made of carbon aluminium, steel and cast iron. A spindle module with speeds up to 30,000 rpm or up to 317.2 ft lbs torque supports the large range of components. The linear drives in the X- and Y-axis act contact-free, with long-term precision as well as maintenance-free and thus guarantee unparalleled dynamics of up to 5 g, with best control quality. “Coupled with the rigidity of the machines, this enables excellent surfaces up to Ra 0.3 µ. Furthermore, high rapid traverses result in a significant reduction of the machining time by up to 30 percent,” adds Markus Piber. The single-piece, thermo-symmetrical machine bed and the comprehensive cooling measures ensure high thermal stability and thus enable complex machining under changing conditions.

The DMU 340 Gantry with its 35.3 ft³ work area volume was particularly developed for large component machining, in the aerospace industry, tool and mold making and general mechanical engineering.

The standard version with 173.2 x 106.3 inches table already provides space for workpieces weighing up to 22,046 lbs. The maximum load can optionally be increased to 66,138.7 lbs. Larger travel distances can be added on request: 236.2 inches in the X-axis and 59.1 inches in the Z-axis. By default, the DMU 340 Gantry achieves travel distances of 133.9 x 110.2 x 49.2 inches. Whereby workpieces up to 173.2 x 119.7 x 60.7 inches can be machined – with at the same time smaller footprint of 635.1 ft². The production of complex large components is ensured: The B-axis milling head has a 50° swivel plane enabling the machining of angles up to -10 °.

The DMU 340 Gantry uses the SK40 speedMASTER motor spindle as standard, produced in-house with 15,000 rpm and 317.2 ft lbs. The range of spindle modules allows an application-specific equipment with HSK-A63 speedMASTER spindles with up to 30,000 rpm or up to 105.9 hp for high machining performance with excellent surfaces at the same time. These are the order of the day in the aerospace field. The HSK-A100 spindles with 317.2 ft lbs torque for heavy-duty machining, specifically in mold making, round off the comprehensive range of spindles on offer. There is space for 30 tools in the chain magazine as standard. The optional wheel magazine provides space for 63 tools and can be extended to up to 183 tool pockets.

As far as the control is concerned, DMG MORI is using CELOS for the DMU 340 Gantry as it does for all its machines. In addition to CELOS on SIEMENS, DMG MORI will present CELOS on HEIDENHAIN at the IMTS 2018. The app-based control and operating interface supports users on the machine with 21.5” multi-touch display and 27 CELOS APPs with regard to the organization of orders and process optimization. CELOS acts as interface for integration of the machine into the company organization and for their interaction in production networks of the future. Adding to this are intelligent equipment options for optimizing manufacturing processes and further increasing process reliability. This includes amongst others an infrared measuring probe, tool measurement in the work area, mechanical tool breakage monitoring as well as Machine Protection Control (MPC) for reliable prevention of collisions.

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