Wire EDM — Wire Electrical Discharge Machining
Wire EDM uses a continuously fed electrode wire and controlled electrical discharges to cut a programmed path through electrically conductive material.
How Wire EDM — Wire Electrical Discharge Machining works
- Upper and lower guides position the moving wire while the control coordinates the cutting path.
- Dielectric water, filtration and controlled flushing stabilize the discharge gap and remove debris.
- Multiple skim passes can improve size, straightness and surface finish after a rough cut.
- Automatic threading, taper control and submerged cutting influence unattended capability and part range.
What to compare
| Work envelope | Table travel, work tank, workpiece mass and actual guide clearance. |
|---|---|
| Taper | U/V travel, angle capacity and thickness-dependent limits. |
| Threading | Automatic wire-threading range and recovery after wire break. |
| Fluid system | Deionization, filtration, chiller condition and consumable cost. |
| Control/technology | Installed options, material tables, networking and program compatibility. |
Used-equipment inspection checklist
Verify the machine
- Cut and measure a test profile at representative thickness.
- Test automatic threading at more than one location.
- Inspect guides, contacts, belts and wire path.
- Check water quality control, pumps, filters and chiller.
- Verify taper, corner control and skim-cut performance.
Verify the transaction
- Match the serial number and configuration to the seller's description.
- Identify every included and excluded accessory in writing.
- Confirm power, air, coolant, foundation, rigging and relocation requirements.
- Record a time-stamped operating demonstration and measured result.
- Price missing service, software, tooling and recommissioning before comparing offers.
Why this term matters in the used-machine market
Search results and listings often compress a complete production system into one label. Buyers should translate that label into capacity, condition, control generation, included tooling, serviceability and demonstrated output. Sellers improve credibility by disclosing those facts instead of repeating a brochure headline.
Market value is also specific to timing and buyer fit. A capable machine can trade poorly when its configuration is hard to relocate, support or redeploy; a common platform with documented maintenance, current controls and proven output may attract a wider buyer pool.
Related machine-tool terms
Frequently asked questions
Does wire EDM require a starter hole?
Closed internal contours generally need a start hole unless the machine includes another method; outside profiles can begin at an accessible edge.
What drives operating cost?
Wire, filters, resin, contacts, power, water treatment, maintenance and cycle time all contribute.
Sources and further reading
Source roles are explicit: linked organizations describe their own products, programs or technical guidance. The Machine Blue Book independently organizes and interprets that material for education and used-equipment due diligence. A citation is not an endorsement, sponsorship or guarantee.
- Makino — Electrical Discharge Machining. Machine-builder overview of wire, sinker and EDM drilling processes. Reviewed September 26, 2026.
- IMTS — IMTS Technology Sectors. Primary classification of metal removal, quality, automation, software, tooling and workholding sectors. Reviewed September 26, 2026.
See the complete source register, research methodology and editorial standards.