EDM Guide: Wire & Sinker Electrical Discharge Machining Explained

EDM Guide: Wire & Sinker Electrical Discharge Machining Explained

Short answer: Electrical discharge machining (EDM) cuts electrically conductive metal with controlled sparks instead of a cutting tool — so hard, brittle or delicate parts (tool steel, carbide, tungsten) can be shaped to tight tolerance with no mechanical force. Wire EDM slices profiles; sinker EDM burns cavities.

At a Glance

EDM Guide: Wire & Sinker Electrical Discharge Machining Explained chart
Figure 1 – EDM Guide: Wire & Sinker Electrical Discharge Machining Explained overview.

How the Spark Cuts

A servo-held electrode erodes the workpiece in dielectric; relate to Metal Machinability Guide and Metal Grain Size Guide. Hard stock from Tool Steel Supplier and Tungsten Supplier is ideal.

Process Selection

Pick wire vs sinker by geometry; inspect results via Metal Ndt Guide and verify size per Mill Test Certificate Guide. Wear relates to Metal Wear Mechanisms Guide.

QA & Supply

Protect finished parts via How To Prevent Metal Rust. HXSCO supplies EDM-friendly grades to your drawing.

Get a Quote

Tell HXSCO your requirements and we will respond with a competitive quote and lead time.

Frequently Asked Questions

What is EDM?

Cutting metal with controlled electrical sparks in a dielectric fluid.

Wire vs sinker EDM?

Wire slices thin profiles; sinker burns cavities with a shaped electrode.

What metals can be EDM’d?

Any conductive metal — steel, carbide, tungsten, even exotic alloys.

Does EDM stress the part?

No — there is no cutting force, so thin and fragile parts are safe.

Do you supply EDM stock?

HXSCO supplies tool steel, carbide and tungsten suited to EDM.

Source EDM-Friendly Metal from HXSCO

HXSCO supplies tool steel, carbide and tungsten grades suited to wire and sinker EDM. Send your grade and quantity for a quote.

Request a Quote