ONA QX6

$150,000 - $250,000 Updated 2026-03-14

Key Specifications

X Travel

650 mm (25.6 in)

Y Travel

450 mm (17.7 in)

Z Travel

450 mm (17.7 in)

Table Size

900 x 600 mm (35.4 x 23.6 in)

Accuracy

2 um

Repeatability

1 um

Overview

The ONA QX6 is a large-capacity sinker EDM from ONA Electroerosion, built for mold and die shops that need a substantial work envelope paired with serious generator power. With 650 x 450 x 450 mm (25.6 x 17.7 x 17.7 in) of X/Y/Z travel and a table size of 900 x 600 mm, the QX6 handles sizeable injection mold cavities, forging dies, and die cast tooling that would be a tight fit on smaller sinker EDMs. ONA has been manufacturing EDM equipment in Spain's Basque Country since 1952, and the QX line represents their current-generation sinker EDM technology.

The QX6's digital generator is the key differentiator. ONA's generator technology provides fully adaptive spark control with real-time waveform optimization, reducing electrode wear while maintaining aggressive material removal rates. On roughing passes in tool steel, you can expect metal removal rates in the range of 400-500 mm3/min with graphite electrodes, and the generator automatically transitions to fine-finishing parameters for mirror-quality surfaces down to VDI 10 (Ra 0.4 um). The generator also handles copper electrodes effectively, which matters for shops that prefer copper for certain cavity geometries.

The C-frame machine construction uses heavily ribbed cast iron for vibration damping and thermal stability. The Z-axis uses precision linear guideways with a servo-driven ram that provides smooth, controllable electrode feed. The worktank is designed with a fast fill/drain system to minimize non-cutting time between operations, and the dielectric fluid management system includes fine filtration to maintain consistent flushing conditions.

ONA's proprietary CNC control provides a touchscreen interface with graphical orbit pattern programming, electrode wear compensation, and multi-electrode sequencing. The control supports up to 4-axis simultaneous movement for orbital erosion patterns that improve flushing and reduce electrode wear on deep cavities. An optional linear motor Z-axis is available for applications requiring the fastest possible servo response, such as micro-finishing and thin-rib work where arc prevention is critical.

Full Specifications

Parameter	Value
X-Axis Travel	650 mm (25.6 in)
Y-Axis Travel	450 mm (17.7 in)
Z-Axis Travel	450 mm (17.7 in)
Table Size	900 x 600 mm (35.4 x 23.6 in)
Max Workpiece Weight	2,000 kg (4,409 lb)
Max Electrode Weight	200 kg (441 lb)
Surface Finish	VDI 10 (Ra 0.4 um) achievable
Metal Removal Rate	400-500 mm3/min (graphite roughing)
Positioning Accuracy	2 um
Repeatability	1 um
CNC Control	ONA proprietary touchscreen CNC
Generator	ONA digital generator with adaptive spark control
Dielectric Tank Capacity	Approx. 800 L (211 gal)
Machine Weight	6,500 kg (14,330 lb)
Machine Dimensions	2,800 x 2,500 x 2,900 mm (110 x 98 x 114 in)
Modelqx6brandonatypeedm Sinkerscontrolcontact Sales Rep	Contact Sales Rep.
Modelqx6brandonatypeedm Sinkerscontrol	Contact Sales Rep.
Model	QX6
Brand	ONA
Type	EDM Sinkers
Power Pack200 Atable Size W315table Size L472x394	Y23.6"Z19.7"ControlCNC
Power Pack	200 A
Table Size W	31.5"
Table Size L	47.2"
X	39.4"
Y	23.6"
Z	19.7"
Cnc Control	CNC
Looking To Purchase A New Ona Qx6	Contact Sales Rep.

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

Strengths & Limitations

Strengths

650 x 450 x 450 mm travel handles large mold cavities and forging dies that exceed typical mid-range sinker EDM envelopes
Adaptive digital generator with real-time waveform optimization reduces electrode wear while maintaining competitive removal rates
2,000 kg table capacity accommodates heavy mold bases and die blocks without specialized fixtures
Multi-electrode sequencing and automatic electrode changing support unattended operation on complex cavities
Surface finish capability down to VDI 10 (Ra 0.4 um) eliminates manual polishing on many mold surfaces
Optional linear motor Z-axis provides superior servo response for micro-finishing and thin-rib applications

Limitations

ONA brand has lower recognition in North America compared to Makino, Sodick, or AgieCharmilles sinker EDMs
Proprietary control system lacks the installed base and familiarity of Fanuc or Mitsubishi controls
Service network in North America is thinner than Japanese or Swiss competitors, potentially extending downtime for field service
Resale values in the US market are typically lower than equivalent Japanese sinker EDMs
Machine footprint and weight (6,500 kg) require adequate floor space and foundation preparation

Best For

Injection mold shops sinking large cavities for automotive, appliance, and consumer product molds Forging die manufacturers requiring deep cavity work in hardened tool steels Die casting tooling shops needing a large-envelope sinker EDM for aluminum and zinc die cavities Aerospace manufacturers EDM'ing complex features in nickel alloys and hardened steels Shops seeking European build quality in a sinker EDM at a competitive price point versus Swiss alternatives Tool and die operations requiring multi-electrode sequencing for unattended cavity sinking

Frequently Asked Questions

01 What does an ONA QX6 cost?

New ONA QX6 machines typically price between $150,000 and $250,000 depending on generator power, options like linear motor Z-axis, and electrode changer configuration. This is generally competitive with or slightly below equivalent Makino or AgieCharmilles sinker EDMs.

02 How does the QX6 compare to the smaller QX4?

The QX6 offers significantly more travel (650x450x450mm vs 400x300x350mm) and workpiece capacity (2,000 kg vs 1,000 kg). Both share the same generator technology and control platform. The QX4 is better suited for smaller mold inserts and die components, while the QX6 handles full-size mold cavities.

03 Does the QX6 support automatic electrode changing?

Yes. The QX6 is compatible with ONA's automatic electrode changing systems, supporting multi-electrode sequencing for rough, semi-finish, and finish electrodes in a single unattended cycle.

04 What electrode materials work best with the QX6?

The QX6's generator is optimized for both graphite and copper electrodes. Graphite is preferred for most roughing and general work due to lower electrode wear. Copper electrodes produce finer surface finishes and are used for precision cavity work.

05 Can the QX6 achieve mirror finishes?

The QX6 can achieve surface finishes down to VDI 10 (Ra 0.4 um) with appropriate electrode materials and multi-pass strategies. For true mirror finishes below Ra 0.2 um, manual polishing is still typically required.