Hurco VMX30UDi

$175,000 - $230,000 (new) | $100,000 - $150,000 (used) Updated 2025-03-15

Key Specifications

X Travel

762 mm (30 in)

Y Travel

508 mm (20 in)

Z Travel

520 mm (20.5 in)

Max Spindle

15,000 RPM

Spindle Taper

CAT 40 / Big Plus

Tool Capacity

Overview

The Hurco VMX30UDi is the direct-drive spindle variant of the mid-size VMX30U trunnion 5-axis platform. The 'D' in the name stands for direct-drive, and that's the key upgrade — a 15,000 RPM spindle without belts, delivering smoother operation, less thermal growth, and better surface finish at high speeds compared to the belt-driven Ui variant.

Travels are 762 x 508 x 520 mm (30 x 20 x 20.5 in) with a 248 mm (9.8 in) diameter trunnion table rated for 200 kg (440 lb). A-axis tilts +30/-110 degrees, C-axis rotates 360 degrees. Physically, the machine looks nearly identical to the standard VMX30Ui, sharing the same frame, guarding, and table.

The 15,000 RPM direct-drive spindle produces 11 kW (15 hp) of peak power and 95.5 Nm (70.4 ft-lbs) of torque at 1,500 RPM. While the torque figure is lower than the belt-driven Ui's 213 Nm at 600 RPM, the direct-drive design eliminates belt harmonics that can cause surface finish issues during finishing passes. For shops doing precision mold work or medical components where surface quality matters as much as material removal, the UDi is the better choice.

Rapids are faster than the standard Ui at 45 m/min (1,771 ipm) on X/Y and 40 m/min (1,575 ipm) on Z. The 40-tool ATC carries CAT 40 / Big Plus tooling with 76 mm max diameter, 300 mm max length, and 7 kg max weight. Rotary axes rapid at 25 RPM.

At 5,940 kg (13,068 lb), the UDi is about 1,000 kg heavier than the standard Ui, reflecting the direct-drive motor assembly. Floor space is 3,940 x 4,062 mm (155 x 160 in), essentially identical to the Ui. Power draw is 25.25 KVA.

New pricing runs $175,000-$230,000, commanding a $25-30K premium over the belt-driven VMX30Ui for the direct-drive spindle upgrade.

Full Specifications

Parameter	Value
X-Axis Travel	762 mm (30 in)
Y-Axis Travel	508 mm (20 in)
Z-Axis Travel	520 mm (20.5 in)
A Axis Range	+30° / -110°
C Axis Range	360°
Max Spindle Speed	15,000 RPM
Spindle Taper	CAT 40 / Big Plus
Spindle Motor Power	11 kW (15 hp) peak
Spindle Torque	70.4 ft. lbs @ 1,500 rpm (95.5 Nm @ 1500 rpm)
Tool Capacity	40
Rotary Table Diameter	248 mm (9.8 in)
Max Table Load	200 kg (440 lb)
Rapid Traverse Xy	45 m/min (1,771 ipm)
Rapid Traverse Z	40 m/min (1,575 ipm)
Rotary Axis Rapid	25 RPM
Max Tool Diameter	3.0 in (76 mm)
Max Tool Length	11.8 in (300 mm)
Max Tool Weight	15.4 lb (7 kg)
Machine Weight	5,940 kg (13,068 lb)
Floor Space	3,940 x 4,062 mm (155 x 160 in)
CNC Control	Hurco WinMax
Travels Capacityx Y Z Axis Travel	30 x 20 x 20.5 in (762 x 508 x 520 mm)
A Axis Travel	+30°/-110°
C Axis Travel	360°
Spindle Nose To Table	3.5 / 25 in (90 mm / 635 mm)
Table Diameter	9.8 in (248 mm)
Max Weight On Table	440 lbs (200 kg)
T Slot Size	6 x .48 in x 60° (6 x 12 mm x 60°)
Spindlemax Spindle Speed	15,000 rpm
Peak Spindle Motor	15 hp (11 kW)
Tool Changertool Type	CAT 40 (CAT, BT, DIN 40)
Feedratesrapid Traverse Xyz Axis	1,771, 1,771, 1,575 in/min (45, 45, 40 m/min)
Max Programmable Feedrate	1,575 in/min (40 m/min)
Rapid Traverse A C Axis	25 rpm
Sizemax Operating Floor Space	155.1 x 159.9 in (3,939.5 x 4,061.5 mm)
Machine Height	124.1 in (3,152.1 mm)
Machine Weight	13,068 lb (5,940 kg)
Electricalpower Rating Full Load Kva	25.25 KVA

Specifications sourced from hurco.com — verified 2026-03-28

Strengths & Limitations

Strengths

Direct-drive spindle eliminates belt harmonics, delivering superior surface finish on precision finishing passes
15,000 RPM max speed is a meaningful 25% upgrade over the belt-driven Ui's 12,000 RPM for aluminum work
45 m/min rapids are 18% faster than the standard Ui, reducing non-cutting time on complex 5-axis programs
Less thermal growth than belt-driven spindles improves dimensional accuracy during long production runs
Same 40-tool ATC and CAT 40 tooling compatibility as the standard Ui — no tooling changeover needed
WinMax conversational 5-axis programming makes the upgrade accessible without adding CAM infrastructure

Limitations

95.5 Nm torque at 1,500 RPM is significantly less than the Ui's 213 Nm at 600 RPM — reduced heavy roughing capability
$25-30K premium over the standard Ui is hard to justify unless your work specifically demands better surface finish
248 mm trunnion table remains the part-size limiting factor regardless of spindle type
Direct-drive spindle repairs are more expensive than belt-driven units — expect $10,000-$18,000 for rebuilds
Lower torque means slower material removal rates in steel and harder alloys compared to the belt-driven variant

Best For

Mold and die shops where surface finish quality on contoured cavities directly reduces polishing time Medical device manufacturers machining implants and instruments requiring tight surface roughness specs Shops producing precision optical and electronic components where finish quality is a deliverable spec Aerospace shops machining aluminum structural parts that specify surface finish requirements Job shops upgrading from the standard Ui that need better finish quality for evolving customer requirements Production environments running long cycles where direct-drive thermal stability improves part consistency

Frequently Asked Questions

01 What does a Hurco VMX30UDi cost?

New pricing runs $175,000-$230,000, about $25-30K more than the belt-driven VMX30Ui. The premium reflects the direct-drive spindle motor and associated drive electronics. Used machines are limited in availability due to lower production volume.

02 What's the real-world difference between direct-drive and belt-drive?

Direct-drive eliminates the vibration harmonics introduced by belt tension and pulley alignment. In practice, you'll see measurably better surface finish (typically 20-30% lower Ra values) on finishing passes, less thermal drift during long programs, and reduced maintenance since there are no belts to tension or replace. The trade-off is lower torque at low RPM.

03 Can the VMX30UDi still rough steel effectively?

Yes, but at reduced depths and feed rates compared to the belt-driven Ui. The 70.4 ft-lbs of torque at 1,500 RPM handles steel roughing with appropriately sized endmills and moderate parameters. For heavy steel hogging, the standard Ui's 157 ft-lbs at 600 RPM is the better choice.

04 How does the direct-drive spindle affect maintenance?

Direct-drive spindles have fewer wear items (no belts) but the motor assembly is more complex. Routine maintenance is actually simpler — no belt tension adjustments. However, when a direct-drive spindle fails, the repair cost is typically $10,000-$18,000 versus $5,000-$10,000 for belt-driven units.

05 Should I choose the UDi over the UHSi?

Different tools for different jobs. The UHSi offers 20,000 RPM and 29 kW for maximum speed and power in aluminum machining. The UDi offers 15,000 RPM and direct-drive smoothness for superior finish quality at more moderate speeds. Choose UDi for precision finishing, UHSi for maximum material removal rate in aluminum.