Doosan's new NHP seriesClick image to enlarge

Doosan Machine Tools has unveiled the new NHP horizontal machining centre series.

Designed to achieve rapid metal removal rates in industries including automotive and aerospace, the 400 mm 15.75 in.) pallet NHP 4000 and 500 mm (19.68 in.) pallet NHP 5000 are configurable for a range of applications.
The NHP machines come standard with a 15,000 rpm spindle with 140 horsepower and 169 ft-lbs of torque. For heavy cutting, a high-torque 15,000 rpm spindle with 223 ft-lbs is available, and a 20,000 rpm spindle is in development for customers with higher speed precision applications.
Up to 1G acceleration/deceleration on X, Y and Z-axes enhances productivity and delivers productivity increases as high as 25 per cent over the previous model. Ball screw shaft and bearing cooling systems keep the temperature of fast moving axes stable, ensuring precision machining.
The new random access disc-type tool magazine allows high speed 0.9 second tool-to-tool and 2.3 second chip-to-chip times. In addition to minimizing non-cutting time, this design also reduces vibration, resulting in more stable operation.
In optimizing the construction of the machine, the footprint of the NHP has been reduced by 15 per cent compared to the previous model, yet the machining area has been expanded by 18 per cent. The three point leveling design makes machine installation and maintenance simpler, and the centre through bed evacuates large volumes of chips efficiently.
The pallets can accommodate loads of up to 400 kg (880 lbs), for the NHP 4000 and up to 500 kg (1100 lbs) for the NHP 5000, and both through pallet and overhead hydraulic fixturing options are available. Additionally, the APC has been refined to achieve a 27 per cent faster indexing time.

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