Fast wire, medium speed or slow wire
Fast-wire machines reuse molybdenum wire, cheap to run, rougher finish. Medium speed adds skim cuts. Slow-wire machines use fresh brass wire once, in deionised water, for fine finish.
No DramaBuyer guide · Metal & CNC
Most low-price Chinese wire EDMs are fast-wire machines that run a molybdenum wire back and forth, a different class from the single-pass brass-wire machines European toolmakers mean by wire EDM.

01
Fast-wire machines reuse molybdenum wire, cheap to run, rougher finish. Medium speed adds skim cuts. Slow-wire machines use fresh brass wire once, in deionised water, for fine finish.
Ask the finish after the main cut and after the last skim.
Stepper drives appear on the cheapest machines. Ask for the drive type and the maximum taper angle.
Ask the fluid, filter type and who supplies the fluid in Europe.
02
Codes starting DK77 follow the Chinese convention for CNC wire cutting, usually fast-wire. The trailing digits are a size class, not a travel figure. One listing coded 55 stated 500 x 800 mm table travel. Read the travel table.
03
Send these with the enquiry. Without them, any number a factory gives you is a guess dressed as a quotation.
04
| Require this | A pass looks like |
|---|---|
| Cut your part in your thickest material, with the full skim sequence. | Size, taper and surface finish sit inside the contract values, measured by your inspector. |
| Cut a square punch and die pair to a stated clearance. | The punch enters the die evenly at the stated clearance. |
| Confirm the wire type on the machine. | Wire, generator and drive type match the contract. |
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06
A slow-wire machine, which may be a used European one.
A die-sinking EDM, which listings often mix in.
07
We name the kind of source, how many and when, and never the factory. Listed prices are asking prices, not landed cost. Where we do not hold a fact we say so: that is a GAP, not an estimate.
08
Every machine we source in this area is on the Metal & CNC page. How a project runs, stage by stage, is on how it works, and what it costs is on pricing.
Straight answers
Usually a process as much as a make. Fast-wire and medium-speed machines are cheap to buy and run; slow-wire machines cost more and finish finer.
Wire type, generator, drive nameplates, your part cut with skims and measured, the punch and die test, and the fluid system.
A Declaration of Conformity for this serial number citing the EDM standard, and a manual in your language.
Buying directly from a Chinese seller, yes in most cases, with the duty to check the documents.
Contact
Send a machine, a quotation you want checked, or a question. We reply with what we would look at first.
Sent
A person reads every message. You will hear back within one working day.
Not sent
Please email info@nodramachina.com directly and we will pick it up from there.