Doosan’s DNM 6700XL machines are equipped with directly coupled 18.5 kW/15,000 rpm spindles as standard, which are said to minimise vibration and reduce noise, especially during high-speed machining operations. The spindles also have 20 bar through-spindle coolant capability.
In addition, the machines feature Doosan Machine Tools’ proprietary thermal compensation system, which minimises the effects of heat generation and regulates thermal expansion.
The DNM 6700XL boasts 36 m/min rapid rates in the X and Y axes, and 30 m/min in Z. Unproductive non-cutting times are further reduced via 30-position automatic tool changers (40 or 60-position options), which are recorded as having a tool-to-tool change time of 1.2 seconds.
Grease-lubricated axis travels (as opposed to oil lubrication) help to reduce maintenance costs by up to 60% and eliminate the need for oil skimmers. What’s more, grease cartridge systems only need replacing every 3 months, as opposed to oil-based systems that require more frequent servicing and manual intervention.
Doosan VMC from Mills offers 2.1 metre X axis
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Mills CNC, the exclusive distributor of Doosan machine tools in the UK, is now offering the DNM 6700XL vertical machining centre, which features an X axis of 2.1 m. This dimension is significantly longer than that offered by the standard DNM 6700 machine (1.3 m), while the work table is also larger, at 2,200 by 570 mm.
