Most parts do not need wire EDM. Milling and turning are faster and cheaper for the majority of the work that comes through our door, and we will tell you that before we quote it.
But there is a specific set of problems where conventional machining runs out of room. Hardened tool steel that eats cutters. Internal profiles no end mill can reach. Tolerances that have to hold across a production run, not just on the first part. In those cases wire EDM is not a fallback. It is the right process, and picking it early saves lead time and scrap.
At Tool Tech, our wire EDM department in Springfield, Ohio runs three Mitsubishi machines and supports customers in aerospace, medical, automotive, and tool and die. Here are the five problems we see most often.
Hardened tool steels and wear-resistant alloys chew through conventional cutting tools. Tool cost climbs, cycle times stretch, and dimensional accuracy drifts as the cutter wears through the job.
Wire EDM removes material through controlled electrical discharges instead of mechanical cutting force. There is no cutter to wear and no cutting pressure to deflect the part, which means hardness stops being a limiting factor.
That matters most when a die component has to be cut after heat treat. Machining soft and then hardening introduces distortion. Cutting the final geometry from a fully hardened block does not.
For our tool and die and die repair customers, this single capability is often what keeps a stamping line running.
Not every part is holes, pockets, and radii. Narrow slots, detailed contours, near-sharp internal corners, and tapered profiles are routine in tooling work, and they are exactly where an end mill hits a wall. A cutter has a diameter, and that diameter sets the smallest inside corner you can produce.
Wire EDM does not have that constraint in the same way. The wire follows a programmed path and holds accuracy through the full cut, which opens up geometry that would otherwise take multiple setups, custom cutters, or a redesign.
We handle all programming in-house in EdgeCam, with programmers trained directly by EdgeCam on current software versions. Your job does not sit in a queue waiting on an outside programmer.
Send us a print or a 3D model and we will tell you which process fits, wire EDM, CNC, or water jet, even if the answer is the cheaper one. Standard wire EDM quotes typically come back within one business day.
Request a Quote or call (937) 399-4333
Making one accurate part is not the hard part. Making the two hundredth part match the first one is.
Aerospace, medical, and precision tooling programs leave very little room for dimensional variation, and inspection catches drift after the money is already spent. Wire EDM is known for repeatability because the process has no tool wear to compensate for and no cutting force pushing the part out of position.
Repeatability is not automatic, though. It comes from programming discipline, work holding, and process control. Our work holding library covers most jobs off the shelf, and when a part needs something that does not exist yet, our in-house design team builds it rather than sending the job out.
For industries where precision directly affects performance, consistency matters every bit as much as accuracy.
Every extra step after the machine adds time, cost, and one more chance to introduce variation.
Wire EDM frequently produces clean edges, fine surface finishes, and accurate features straight off the machine. Requirements vary by application, but reducing deburring and corrective work shortens lead time in a way that shows up on the delivery date.
We also run bead blasting, marking, protective dipping, pre-wire block prep, and secondary operations in-house. A part can go from raw block to finished component without leaving our facility, which cuts handling, transit risk, and vendor coordination.
The most common misconception we hear is that wire EDM only handles small, delicate work.
It handles that well. It also handles a lot more than most people expect. Our floor runs three Mitsubishi wire EDMs, the MV4800, MV2400R, and FA20, plus a Current ST300 EDM Drill, with a maximum workpiece capacity of 49.2″ × 40.1″ × 20″ and maximum travel of 31.5″ × 23.6″ × 20″.
That range covers large die sections and structural components that many regional shops have to turn away or subcontract. You can see the full equipment list on our machines page.
We run all three under one roof, so the recommendation is based on the part, not on what we happen to own.
| Wire EDM | CNC Milling | Water Jet | |
|---|---|---|---|
| Material hardness | Any conductive material, including fully hardened | Limited by cutter wear on hardened stock | Any material, hardness irrelevant |
| Max thickness | Up to 20″ workpiece height | Depends on setup and reach | Up to 10″ |
| Tolerance | Tightest of the three | Good to very good | Loosest of the three |
| Heat-affected zone | Minimal | None from cutting | None |
| Internal sharp corners | Yes, limited by wire diameter | No, limited by cutter diameter | No, limited by stream width |
| Best for | Die details, punches, carbide, post-heat-treat geometry | Pockets, faces, 3D surfaces, volume removal | Fast blanks, thick plate, non-conductive material |
Fast rule of thumb: if the material is hardened or the feature is finer than your smallest cutter, it is a wire EDM job. If you need to remove a lot of material quickly, it is a milling job. If you need a rough blank out of thick plate fast, it is a water jet job.
Wire EDM is not “put the block in and press cycle start.”
Getting a good result means understanding what the part does, how it assembles, what happens downstream, and where the tolerance actually needs to live. That judgment comes from tool and die work, not from machine hours.
Tool Tech has been building, modifying, and repairing tooling since 1985 out of a 38,000 sq. ft. facility in Springfield. Design, CNC machining, wire EDM, die repair, special machines, and contract manufacturing all happen under one roof. When a program needs the surrounding structure machined and the precision detail wired, that is one job on one purchase order instead of two vendors and a shipping window in between.
Wire EDM is used to cut precise profiles in electrically conductive materials using a thin charged wire. It is most common in tool and die work, aerospace and medical components, punches, die sections, and any part with geometry too fine or too hard for conventional milling.
Yes. Because wire EDM removes material through electrical discharge rather than mechanical cutting, material hardness does not limit the process. This is why die components are often cut after heat treat, so the final geometry holds without distortion.
It depends on the machine. At Tool Tech, our maximum workpiece capacity is 49.2″ × 40.1″ × 20″, so we can cut parts up to 20 inches tall.
Per hour, usually yes. Per finished part, often no. When wire EDM eliminates tool wear, extra setups, or secondary finishing operations, total cost frequently comes in lower than the conventional route. The right comparison is cost per good part delivered, not cost per hour.
Any electrically conductive material, including hardened tool steel, carbide, titanium, Inconel, aluminum, brass, and copper. Non-conductive materials like plastics, glass, and composites need a different process, which is where water jet cutting comes in.
Most parts do not need wire EDM. The ones that do usually need it badly, and choosing the wrong process shows up as scrap, missed dates, or a die that does not hold size.
If your project involves hardened materials, intricate geometry, tight tolerances, production tooling, or repair work, send it over. We will tell you which process fits and quote it honestly, including when the answer is the cheaper conventional route.
Tool Tech
4901 Urbana Road, Springfield, OH 45502
(937) 399-4333
Request a Wire EDM Quote. Standard wire EDM quotes typically come back within one business day.
Learn more about our wire EDM machining services in Springfield and Dayton, Ohio.
Rusty Fullon is Technical Operations Director at Tool Tech in Springfield, Ohio, where he works with customers on wire EDM, precision tooling, CNC machining, and process selection. His background spans tool and die manufacturing, precision machining, and production support across aerospace, medical, and automotive programs.
