2018 Doosan NHP-4000 CNC Horizontal Machining Center

The 2018 Doosan NHP-4000 is a high-performance CNC horizontal machining center engineered to maximize multi-face machining throughput without compromising on precision. Powered by a 15,000 RPM CAT 40 Big Plus spindle driven by a 25 HP continuous motor that peaks at 49.6 HP under heavy cuts, this machine offers the speed and torque to process everything from aluminum to hardened steels. The dual 400mm pallet system with full B-axis continuous indexing keeps spindle utilization high, allowing operators to load and fixture on one pallet while the machine cuts on the other. With 22 inches of X-travel, 25.2 inches of Y-travel, and 26 inches of Z-travel, the NHP-4000 covers a generous work envelope. A 60-tool chain-type automatic tool changer with 0.9-second tool-to-tool and 2.3-second chip-to-chip times drives fast cycle transitions, while Renishaw probing adds in-process part verification and automated tool measurement. Each pallet supports up to 880 pounds, and the 8-second pallet swap ensures minimal non-cutting time in production. The NHP-4000 represents a notable advancement over the earlier Doosan HP-4000 series that preceded it. Where the HP-4000 topped out at 12,000 RPM with a standard CAT 40 taper, this NHP-4000 delivers a 15,000 RPM dual-contact Big Plus spindle that provides roughly three times the face-to-face contact rigidity of a conventional CAT 40 interface, reducing chatter and improving surface finish on demanding cuts. Rapid traverse rates jump to 2,362 IPM across all axes, a meaningful increase that compresses cycle times on parts requiring frequent repositioning. The Fanuc 31i-B control replaces the older 31i-A series with faster block processing speeds, expanded program memory, and enhanced Ethernet networking for seamless DNC and remote monitoring. For shops evaluating horizontal machining centers in the 400mm pallet class, the NHP-4000 balances production-grade throughput with a compact footprint and the option to scale to larger pallet pools as demand grows.