Mazak UD-400/5X
Key Specifications
Max Spindle
Spindle Taper
Spindle Power
Max Workpiece ⌀
spindle torque
spindle construction
Overview
The Mazak UD-400/5X is an ultra-precision simultaneous 5-axis machining center built on a mineral-cast base with a fully symmetrical double-column structure. This machine targets the highest-accuracy applications in optics, medical, electronics, and precision instrument manufacturing where surface finish and dimensional accuracy measured in single-digit microns are non-negotiable.
The 45,000 RPM spindle with HSK-E40 taper, core cooling, and built-in motor construction delivers extreme surface speeds for fine finishing of aluminum, copper, brass, and engineering plastics. At 13.8 kW (18.5 hp) and 6.9 Nm (5.1 ft-lb) of torque at 40% ED, the spindle is optimized for light cuts at very high speeds rather than heavy material removal. This is a finishing machine, not a roughing machine.
Direct-drive motors on the B and C rotary axes eliminate belts, gears, and associated backlash for the highest possible rotary positioning accuracy. High-accuracy scale feedback on all five axes (X, Y, Z, B, C) provides closed-loop positioning verification at every point in the work envelope.
The mineral-cast base provides superior vibration damping compared to conventional cast iron, which directly translates to better surface finishes at the micro-level. The fully symmetrical double-column structure ensures thermal growth affects both sides equally, minimizing positional drift during extended precision runs.
The pallet size is 320 x 320 mm (12.6 x 12.6 in) with maximum workpiece capacity of 400 mm (15.75 in) diameter and 300 mm (11.81 in) height. MAZACHECK automatic 5-axis alignment compensation and Thermal Shield temperature compensation keep the machine in spec throughout production runs.
The UD-400/5X competes with ultra-precision 5-axis machines from Kern (Micro/Pyramid Nano), Yasda (YMC 430), Roders (RXP 501 DS), and Makino (iQ500). Mazak enters this niche with competitive pricing and its established global service infrastructure.
Full Specifications
| Parameter | Value |
|---|---|
| Max Spindle Speed | 45000 min-1(rpm) |
| Spindle Motor Power | 13.8 kW / 18.5 hp (40% ED) |
| Spindle Torque | 6.9 Nm (5.1 ft-lb) at 40% ED |
| Spindle Taper | HSK-E40 |
| Spindle Construction | Built-in motor with core cooling |
| B C Axis Drive | Direct drive motors (no belts or gears) |
| Scale Feedback | All 5 axes (X, Y, Z, B, C) |
| Pallet Size | 12.6″ × 12.6″ |
| Max Workpiece Diameter | 400 mm (15.75 in) |
| Max Workpiece Height | 300 mm (11.81 in) |
| Base Material | Mineral cast (polymer concrete) |
| Construction | Fully symmetrical double column |
| Thermal Compensation | Thermal Shield automatic |
| Calibration | MAZACHECK 5-axis alignment |
| CNC Control | MAZATROL SmoothAi CNC |
| Output 40 Ed | 13.8 kW (18.5 HP) |
| Torque 40 Ed | 6.9 N.m (5.1 ft･lbs) |
| Tool Shank | HSK-E40 |
| Maxspindle Speed | 45000 min-1(rpm) |
| Maxworkpiece Size | Φ15.75″ × 11.81″ |
Specifications sourced from mazak.com — verified 2026-03-28
Strengths & Limitations
Strengths
- 45,000 RPM spindle delivers extreme surface speeds for ultra-fine finishing on aluminum, copper, brass, and plastics
- Mineral-cast base provides superior vibration damping compared to cast iron for micro-level surface finish quality
- Direct-drive B and C axes eliminate all mechanical backlash for the highest rotary positioning accuracy
- Scale feedback on all five axes provides closed-loop position verification throughout the work envelope
- Fully symmetrical double-column structure ensures balanced thermal behavior during extended precision runs
- HSK-E40 taper with core-cooled spindle maintains thermal stability at sustained high speeds
- MAZACHECK and Thermal Shield keep the machine in spec automatically during production runs
Limitations
- 6.9 Nm spindle torque severely limits cutting in steel, titanium, or any high-strength material - this is a finishing machine
- HSK-E40 taper limits tool selection to small-diameter precision tooling only
- 400 mm max workpiece diameter restricts the machine to small precision components
- Ultra-precision capability comes at $500K+ pricing that only premium applications can justify
- 45,000 RPM spindle requires careful maintenance and expensive replacement if damaged
Best For
Frequently Asked Questions
01
New pricing typically ranges from $500,000 to $800,000 depending on configuration and options. This positions it competitively against Kern, Yasda, and Roders ultra-precision machines that often exceed $800,000-$1,200,000.
02
Technically yes, but it is not designed for it. The 6.9 Nm spindle torque and HSK-E40 taper limit the machine to very light cuts in steel. This is an ultra-precision finishing machine for aluminum, copper, brass, plastics, and composites. For steel 5-axis work, the VARIAXIS C or i series are appropriate choices.
03
Mineral cast (polymer concrete) damps vibration 6-8x more effectively than cast iron. For ultra-precision machining where surface finish quality depends on minimizing any vibration at the tool tip, this material advantage directly translates to better results at the micron level.
04
Both target the ultra-precision niche. Kern has a longer track record in micro-precision with slightly tighter achievable tolerances. Mazak counters with the SmoothAi control ecosystem, global service network, and typically lower pricing. For shops already in the Mazak ecosystem, the UD provides ultra-precision without changing platforms.
05
Ultra-fine surface finishes require very high surface speeds with very light depths of cut. At 45,000 RPM with small-diameter tools, the UD achieves the cutting speeds needed for mirror-quality finishes on aluminum and copper without polishing. This is why the torque is low - the machine is making micro-cuts at extreme speed.
Videos
MazakEurope
John Hart
Yamazaki Mazak Corporation [English]
John Hart
Yamazaki Mazak Corporation [English]
Community Discussions
Community discussion — Mazak 400A 5X - Practical Machinist
Pricing and buying discussion — Value opinions ? 2014 Mazak 5 axis VMC with______ hours
Community discussion — Tention on Z axis thrust bearing? | Practical ...
Troubleshooting and problem-solving — Mazak VCU problem
Troubleshooting and problem-solving — Need Help! 5 Axis programming Mazak 400 III ... - CNCzone
Maintenance and service — Mazak MYSTERY. HOW do you clear this ANNOYING Mazak alarm ...
Community discussion — Need Help! INTEGREX 400-IV 5 AXIS PROGRAM SAMPLE - CNCzone
Community discussion — Mazak, Mitsubishi, Mazatrol - CNCzone
Community discussion — Got a job where they have a mazak machine… they don’t know ...
Owner experience and review — Experience with Mazak? : r/Machinists - Reddit
Community discussion — Need help finding a particular Mazak parameter. :
Owner experience and review — Does anyone have an opinion about Mazak mills :
Links to community discussions. Summaries are editorial — visit the original thread for full context.
Comparisons
Related Machines
DMG Mori DMU 50
Haas UMC-750
Makino D500
DMG Mori DMU 65 monoBlock
DMG Mori DMU 80P duoBLOCK
