Huron GU3 Five
Image: huron.fr, Huron
Key Specifications
Max Spindle
Tool Capacity
Spindle Power
Accuracy
Repeatability
rotary table diameter
How much does the Huron GU3 Five cost?
Price estimate
We do not have a price for the Huron GU3 Five that we can stand behind, so we show no number. Configuration, options and installation move the final price a long way: a quote is the reliable figure.
Overview
The Huron GU3 Five is the smallest of the GU moving-gantry five-axis machining centres. It pairs a 320 mm rotary table with travels of 420 x 520 x 420 mm (16.5 x 20.5 x 16.5 in) and an 18,000 rpm electrospindle, in a machine that weighs 6,000 kg (13,228 lb) and stands on 3,000 x 2,000 mm.
In the GU design the gantry moves and the tilting table stays put in X and Y. The table swivels ±120° on the A axis and rotates 360° on C, at 50 and 75 rpm. Huron drives the C axis directly. An optional turning table speed of 1,200 rpm is listed, which would let the machine turn small parts as well as mill them.
Thermal measures feature heavily in Huron's description: cooling of the ballscrew nuts and linear guides, a spindle chiller and roller-type guideways. The stated positioning is 0.004 mm with 0.002 mm repeatability, the best figures in the GU range.
Spindle power is 26 kW with 84/110 Nm, quoted for a Siemens motor at S1/S6-40%. The table carries 150 kg (331 lb), and 80 to 500 mm separates spindle nose from table plane. Rapids are 50 m/min. One point to confirm with Huron is the tool count: the table gives 32 tools for the GU3 Five, where the GU5 Five has 40 tools.
Full Specifications
| Parameter | Value |
|---|---|
| Rotary Table Diameter | 320 mm (12.6 in) |
| T Slot Size Center Bore | 14 / 40 mm |
| Max Table Load | 150 kg (331 lb) |
| Distance Spindle Nose to Table | 80-500 mm (3.1-19.7 in) |
| X Axis Travel | 420 mm (16.5 in) |
| Y Axis Travel | 520 mm (20.5 in) |
| Z Axis Travel | 420 mm (16.5 in) |
| A Axis Range | ±120° |
| C Axis Range | 360° |
| A C Axis Speed | 50 / 75 rpm |
| Turning Table Speed | 1,200 rpm (optional) |
| Rapid Traverse Xyz | 50 m/min |
| Max Spindle Speed | 18,000 rpm |
| Spindle Motor Power | 26 kW (34.9 hp) (Siemens, S1/S6-40%) |
| Spindle Torque | 84/110 Nm (62.0/81.1 lb-ft) (Siemens, S1/S6-40%) |
| Tool Capacity | 32 |
| Max Tool Diameter (full magazine) | 100 / 110 mm (3.9 / 4.3 in) (all pockets / adjacent empty) |
| Max Tool Weight | 10 kg (22 lb) |
| Max Tool Length | 250 mm (9.8 in) |
| Positioning Accuracy | 0.004 mm (0.0002 in) |
| Repeatability | 0.002 mm (0.0001 in) |
| Machine Weight | 6,000 kg (13,228 lb) |
| Machine Length | 3,000 mm (118.1 in) |
| Machine Width | 2,000 mm (78.7 in) |
| Machine Height | 2,700 mm (106.3 in) |
Specifications sourced from huron.fr — verified 2026-10-04
Strengths & Limitations
Strengths
- Positioning of 0.004 mm and repeatability of 0.002 mm
- A-axis swivel of ±120° with a directly driven C axis
- 18,000 rpm electrospindle with 26 kW (Siemens, S1/S6-40%)
- Optional turning table speed of 1,200 rpm
- Compact 3,000 x 2,000 mm footprint and 6,000 kg weight
Limitations
- Table load is 150 kg (331 lb) on a 320 mm table
- Tool count is given as 32, fewer than the 40 of the GU5 Five
- Tool length is limited to 250 mm
- Turning capability is an option, not part of the base specification
Best For
Frequently Asked Questions
01
420 mm in X, 520 mm in Y and 420 mm in Z, with a rapid traverse of 50 m/min. The rotary table is 320 mm in diameter, carries 150 kg (331 lb) and sits 80 to 500 mm below the spindle nose.
02
The A axis swivels ±120° and the C axis rotates 360°. Swivelling and rotary speeds are 50 and 75 rpm. Huron lists a directly driven C axis and an optional turning table speed of 1,200 rpm.
03
Huron's specification table gives 32 tools for this model. Maximum tool diameter is 100 mm with all pockets full or 110 mm with adjacent pockets empty, maximum length 250 mm and maximum weight 10 kg. The GU5 Five and the larger GU models are listed with 40 tools, so confirm the count for this machine.
04
An electrospindle with a top speed of 18,000 rpm. Power is 26 kW and torque 84/110 Nm, stated for a Siemens motor at S1/S6-40%. Huron's feature list names HSK 63 as the tool interface and includes a spindle chiller.
