EDM Machine

-- Steady & Reliable Manufacturer --

Brief Product Description

An EDM machine removes metal through controlled electrical sparks between a shaped electrode and the workpiece, submerged in dielectric fluid. Because the process uses no cutting force, it is the standard route for hardened tool steel, carbide, and deep or intricate cavities that milling cutters cannot reach cleanly. Thin walls, sharp inside corners, and fine ribs can be produced without distortion, which is why EDM machines are found in almost every mold and die workshop.

The typical buyers are mold makers, tooling shops, precision parts subcontractors, and distributors who resell to local workshops. During sourcing, they compare worktable size, maximum workpiece weight, Z-axis stroke, generator output current, achievable surface finish, and electrode wear rate. The control language, servo response, and dielectric tank volume also decide how smoothly the machine runs in daily production.

Nantong New Era Technology Co., Ltd. has built numerical control machines and CNC machine tools for more than 20 years, with in-house design, machining, and assembly. We support OEM and ODM projects such as private labeling, control panel language, paint color, and electrical standard. Samples and test cuts can be arranged before you commit, and trial orders of a single unit are accepted on standard models. Final configuration, lead time, and export packing are confirmed in the quotation.

Before placing an order, it helps to prepare three facts: the largest workpiece you will burn, the deepest cavity you must reach, and the surface finish your customers expect. With these, our engineers can narrow the choice of table size, Z stroke, and generator quickly. We also suggest planning your electrode material and filtration routine early, because both affect running cost and finish consistency across the first year of production.

Core ProcessSpark erosion with a servo-controlled gap
Typical UsersMold shops, tooling plants, distributors
Key ParametersTable size, Z stroke, max current, surface finish
ControlCNC controller with multi-language interface
CustomizationOEM and ODM, branding, voltage, accessories
Order TermsSamples, single-unit trial order, export packing

Product Overview

Electrical discharge machining works by generating thousands of short, controlled sparks per second across a small gap between the electrode and the workpiece. Each spark melts and vaporizes a tiny amount of material, and the circulating dielectric fluid flushes the debris away and cools the surface. The electrode never touches the part, so material hardness has almost no effect on machinability.

An EDM machine is built around four systems: a rigid frame with a precise Z-axis ram, a pulse generator that sets current and timing, a servo and control unit that keeps the gap stable, and a dielectric tank with filtration. The quality of each system determines removal rate, surface finish, and electrode wear, so two machines with the same table size can perform very differently.

ProcessSpark erosion, no cutting force
MaterialsTool steel, carbide, titanium, copper
Accuracy FocusGap control and thermal stability
OutputCavities, ribs, holes, fine details

Main points for buyers

Confirm the largest workpiece weight and size, then add a margin for fixtures
Ask for removal rate and surface finish figures for the same material and electrode pair
Check the generator range, especially fine-finish settings if you make polished cavities
Verify the filtration system, tank volume, and consumable replacement cost
Request sample cutting or a video of a real test on your part type

What affects landed cost

When comparing quotations, the ex-works price is only one part of the landed cost. Packing method, container size, freight route, insurance, import duty, and installation support all add to the final figure. Include the electrode material, filter elements, dielectric fluid, and spare parts in your first-year budget, and ask whether the quoted price includes the CNC controller, tank, and standard accessories.

Specification

Parameter	Specification
Model Range	Compact to large-format models, configurable
Worktable Size	400 x 250 mm to 1000 x 600 mm
X / Y / Z Travel	300 x 200 x 250 mm to 800 x 500 x 400 mm
Max Workpiece Weight	500 kg to 2000 kg, by model
Max Electrode Weight	50 kg to 200 kg, by model
Dielectric Tank Capacity	200 L to 800 L
Max Machining Current	30 A to 75 A
Max Removal Rate	Up to about 400 mm3/min, by model and material
Best Surface Finish	Down to about Ra 0.2 um with fine-finish circuit
Electrode Wear	Low-wear settings available for graphite and copper
Controller	CNC controller with graphical interface
Power Supply	380 V, 3 phase, 50 Hz, other voltages on request
Machine Weight	About 1200 kg to 4500 kg
Customization	Branding, language, color, accessories

Application

Application Scenarios

Industry	Typical Parts	Buyer Focus
Mold and Die	Injection mold cavities, die-casting inserts	Surface finish, electrode wear, stable long runs
Tooling	Punches, stamping dies, gauges	Accuracy, corner sharpness, repeatability
Aerospace Parts	Turbine slots, fuel nozzles, fixtures	Material range, process documentation
Medical and Precision	Surgical tool features, micro holes	Fine finish, clean surface, low recast layer

Target Customers

Mold MakersNeed dependable cavity burning on hardened steel
Contract Machining ShopsNeed flexible capacity for mixed small batches
DistributorsNeed standard models with stable supply and manuals
Equipment UpgradersNeed to replace aging machines with modern control

Suitable and Unsuitable Uses

Suitable Uses

Hardened tool steel and carbide parts
Deep ribs and sharp inside corners
Thin-wall features that must not deform
Complex shapes that a cutter cannot reach

Unsuitable Uses

Mass removal of soft aluminum where milling is faster
Non-conductive materials such as plain ceramic or plastic
Very large flat surfaces with no detail
Jobs with no budget for electrodes and fluid

Selection Guidance

1. Start with the partList the biggest workpiece, the deepest cavity, and the finish you must reach, then select the table and generator around them.
2. Match the generatorHigh current speeds up roughing, while a good fine-finish circuit saves polishing time later.
3. Plan the electrodesDecide whether graphite or copper suits your parts, and whether you will make electrodes in-house.
4. Think about serviceAsk for manuals, wiring diagrams, and spare parts lists so maintenance stays simple.

Usage Notes

Keep the dielectric fluid clean and replace filters on schedule
Fix the workpiece and electrode firmly and check alignment before burning
Set flushing correctly to avoid arcing in deep cavities
Warm up the machine before precision finishing
Never leave the machine unattended without fire safety measures
Record parameters for each material to repeat good results

Advantages

Stable gap control
A servo system that responds in milliseconds keeps the spark gap steady, which reduces arcing and protects your electrode and workpiece from damage.
Hardness-independent cutting
Because the process erodes by sparks, a 60 HRC mold steel cuts as easily as a soft one, so you can finish after heat treatment and avoid distortion.
Flexible parameter library
Stored parameter sets for common material pairs shorten setup time, helping new operators reach consistent results sooner and lowering scrap risk.
Rigid cast frame
A heavy cast structure absorbs vibration during long burns, which supports repeatable accuracy on deep cavities and reduces rework on critical dimensions.
OEM and ODM support
Panel language, color, voltage, and branding can be adjusted before production, so distributors can launch a product that fits their local market without extra tooling.
Documented delivery
Each shipment includes manuals, wiring diagrams, and a packing list, and sample cutting can be done before shipping, reducing commissioning delay at your site.

Frequently Asked Questions

Q: What materials can an EDM machine cut?
A: Any electrically conductive material, including hardened tool steel, carbide, titanium, copper, and graphite. Non-conductive materials cannot be machined.

Q: What surface finish can I expect?
A: Fine-finish settings can reach roughly Ra 0.2 to 0.4 um depending on the electrode, the material, and the generator. We can confirm with a test cut.

Q: Do you offer OEM or ODM service?
A: Yes. We can adjust branding, control panel language, color, and electrical standard. Details are confirmed in the quotation.

Q: What is your minimum order quantity?
A: Standard models can be ordered as a single-unit trial order. For OEM projects, the quantity is discussed per project.

Q: Can you make a sample before I order?
A: Yes. Send a drawing or sample part and we can arrange a test cut or video so you can judge the result.

Q: What documents come with the machine?
A: A user manual, wiring diagram, packing list, and inspection record are provided. Other export documents are available on request.

Q: What power supply is required?
A: The standard is 380 V, 3 phase, 50 Hz. Other voltages and frequencies can be configured for your country.

Q: How is the machine packed for export?
A: It is fixed on a base, wrapped against moisture, and packed in a wooden case suitable for sea or air freight.