2018 Doosan NHM-6300 CNC Horizontal Machining Center

The Doosan NHM-6300 is a CAT50 CNC horizontal machining center with a reputation for rigid, high-torque metal removal that has made it a staple in heavy-duty production shops. This 2018 unit features travels of 1,050 mm × 900 mm × 1,000 mm (X × Y × Z), a 6,000 RPM Big Plus spindle driven by a 67 HP (50 kW) motor, and a 60-position automatic tool changer with a Fanuc 31i-B control. Two 630 mm × 630 mm pallets rated at 3,307 lb each run on a 1-degree indexer, rapid traverse hits 1,968 ipm across all axes, and the package includes through-spindle coolant, a Renishaw probing system, and a mist collector for production-ready finishing operations.

Against Doosan's predecessor HM-630 and the older HC-500 platform, the NHM-6300 brings measurable upgrades that translate directly into higher throughput on demanding pallet work. The Fanuc 31i-B control replaces the older 18i-M systems seen on HM-630-generation machines with AI contour control, faster look-ahead, and expanded memory, while Doosan widened the Z-axis envelope to 1,000 mm and stiffened the casting geometry around the spindle housing to hold heavier cuts without chatter. Buyers stepping into an NHM-6300 at used pricing pick up a structurally tougher, control-modernized platform — not just a newer machine — and the spec jump shows up in real throughput on heavy steel and complex fixtures.