DMG MORI NHX 4000 4th Gen horizontal center: 400 mm pallet, 15 k rpm, rapid 60 m/min.
Short sentence, punchy. Metal, everywhere. The NHX name rings loud, operators in Sharjah nod. I toured one last month, Dubai Industrial City, dust in the air, coolant smell, caffeine in hand. The 4th Gen badge looks subtle yet every fitter in the hall pointed at the column and said, with that half grin, yeah, the earlier frame was good, this one is stiffer, you feel it right away when the 63 millimeter face mill hits super duplex.
Then the brain starts racing. 560 mm of X feels average on paper, inside the enclosure it looks deeper, maybe because the sidewalls sit further apart. You roll the pallet out, you see 400 x 400 mm cast iron plate, T-slots in a neat grid, zero extra flash. Not glamorous, just proper.
People ask, why would I pick a horizontal when a vertical with a fourth axis is cheaper. I mumble, chip flow, nonstop. Chips drop by gravity, not onto the tool path. You can run stainless for hours, no recut, tool life calmer. DMG MORI keeps the spindle center slightly forward so the Z ways stay away from the spray. The linear guides, size 45, ride on thick shoulders, coolant never pools there, nice.
Two things hit me. First, the pallet change motion is electric, no hydraulics, hiss free, so night shifts in Abu Dhabi hear less clunk. Second, the column on this 4th Gen got extra ribs, rib count jumped from four to six, the casting shop in Iga confirmed that. You hardly see it but you hear it in the cut.
A quick recap, numbers bold, just to anchor the brain: X 560, Y 640, Z 640. That Y is big for a 400-class machine, allows tombstone setups that reach high parts, oil tool bodies, valve blocks, those chunky cubes every EPC contractor seems to send out weekly.
I spun it at 15000 rpm during the demo, with a 16 mm end mill. Sounded clean, like a sewing machine, then again, the hall was empty. Real world, it hums louder, still you do eighty percent of jobs below 10k. Torque is where it counts, 184 Nm at 1500 rpm, direct drive. The optional 20k motor spindle exists, few buy it here, heat, dust, biology of the region, they prefer robust mid speed.
In case someone cares, the bearing set is hybrid ceramic, NSK supplies it, preload class three. DMG MORI claims grease lasts 20 000 hours before first service, technicians from Jebel Ali say they rarely touch it within five.
Quick note, no one in Ras Al Khaimah wants manual pallet handling anymore. The machine ships with LPS 4 ready interface, plug the linear pallet pool, done. A friend wired a Fastems FPC to his NHX line, he said mapping tags in Celos took two evenings, not a nightmare. The 4th Gen cabinet has twin Profinet ports, you can keep the robot on its own subnet, neat.
Before the nitty gritty, breathe. Let the mind wander. Remember the dusty morning ride on Sheikh Mohammed Bin Zayed Road, trucks, heat ripples, then you step into the chilled shop and the white-gray machine just sits, humming, immune to the desert outside.
Two sentences first. People love tables, they read faster than prose, but numbers alone never tell the oil soaked story, still we list them. Here goes.
| Item | NHX 4000 4th Gen | Makino a51nx | Okuma MB-4000H |
|---|---|---|---|
| X/Y/Z travel | 560/640/640 mm | 560/640/640 mm | 560/560/625 mm |
| Max spindle speed | 15000 rpm | 14000 rpm | 15000 rpm |
| Standard magazine | 60 tools | 60 tools | 48 tools |
| Pallet load | 400 kg | 400 kg | 400 kg |
| Rapid traverse | 60 m/min | 60 m/min | 50 m/min |
| Power rating | 30 kW | 22 kW | 26 kW |
| Controller | CELOS with FANUC 31i-B | PRO 5 | OSP-P300M |
Table done. Now digest. Notice how the Makino matches travels yet lags in spindle power. Okuma is slower on rapids but fans love its thermal stability. The NHX sits comfortably in the middle, power wise, yet edges both in the user interface area, CELOS now runs on Linux, touchscreen bigger, fonts crisp.
Dubai, Abu Dhabi, Ajman, wherever. The order mix is random, today aluminum manifolds, tomorrow Inconel 718, Friday maybe a prototype rotor hub. The machine does not flinch. Flood coolant system tosses 150 liters per minute, huge for its size, the chip conveyor is hinged belt with scraper inserts. Service guys say fine Ti chips never jam it, I saw one still clean after a full shift of Ti-6-4, impressive.
Two bullet lists incoming, strap in.
Operators keep telling me the sweet bits are:
Pallet change within 7 seconds door to door, feels instant
3 point leveling pads, easier on rented factory floors with thin slabs
Built in probing, Renishaw OTS and RTS standard, no haggling
Oil mist collector prewired, just add fan, no extra breaker
* Air blast through spindle, clears blind holes, nice for sand castings
After listing, reflect. Each tiny item cuts downtime, a hidden tax nobody budgets for. You snooze, you bleed profit.
Second list, the options catalog that most Gulf buyers actually tick:
20k rpm spindle, only for aerospace but still asked
120 tool matrix magazine, bigger than needed yet future proof
Through spindle coolant 70 bar, pumps from Grundfos
Linear pallet pool six stations, fits same footprint, clever
* IoT connector pack, OPC UA tags unlocked, works with MES
Again, count the lines, think about capex, move on.
One shop in Mussafah logged cycle times. Valve body, 316L, 1.9 kg raw, 12 tools. On a vertical they ran 28 minutes. NHX cycle drops to 17 minutes, chips gone, fewer retracts, tool life plus 20 percent, real data, not marketing. Another part, 7075 gearbox housing, 4 setups collapsed to 2 because tombstone takes four faces at once.
DMG MORI offers the duoBlock DMC 60H and the NHC 4000. The DMC 60H is bigger, 500 pallet, heavier, price hikes accordingly. NHC 4000 uses box guideways, more damping but slower rapids. NHX 4000 4th Gen with linear rails hits the sweet spot of speed and acceptable vibration control. This is why many job shops pair NHX with NH series turning centers as a balanced cell.
The NHX line started in 2010. Gen2 added roller guides, Gen3 switched to i80 control, Gen4 launched 2021, adds 4 MPa coolant roof and wider Y saddle. There is also NHX 5000, 5500, 6300, all share the spindle core but different pallets. Within the 4000, DMG MORI sells a DCG variant, same travels, harmonic drive B axis, pricey though.
DMG MORI quotes 79 field engineers across GCC, the UAE slice is roughly twelve. Response time, they promise 24 hours, my contacts see them within eight most days. Parts warehouse sits in JAFZA, holds motors, boards, lots of sheet metal panels, so no sea freight delay.
Enough numbers, feeling matters too. You stand beside the enclosure, door closes, green light. No vibration in the floor, coolant gushes, chips fly into the auger like fireworks, then vanish. Shift ends, machine rinses itself, pallet flips, next job loads. Simple. Companies that cut parts for oil service rigs, hydraulic manifolds, aerospace brackets, they sign the PO because the NHX handles mix without drama, stays stable in 45 °C ambient, keeps energy draw moderate, and lets them sleep instead of babysitting.
A short pause, coffee sip. You read, maybe thinking of your own bottlenecks. The NHX 4000 4th Gen will not solve strategy, but it removes excuses. That is why it keeps landing on Gulf shop floors.
