EDM Machining Services

Precision Wire & Sinker EDM for intricate features in hard metals and tight spaces.

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Made in Canada

40+

Years of Experience

5K+

Satisfied Customers

Overview

Electrical Discharge Machining (EDM) is a non-contact process that precisely cuts conductive materials using controlled electrical sparks. Pearson coordinates EDM work through vetted Canadian specialists for parts demanding micro-tolerances, sharp internal corners, or hardened alloys. We manage sourcing, QA, and delivery so your parts arrive install-ready.

⚠️ Hybrid fulfillment: EDM is coordinated via trusted Canadian partners under Pearson QA and a single PO.

Quick Specs

Processes

Wire EDM; Sinker (Ram) EDM; EDM Drill (by review)

Wire EDM Tolerance*

Tight features to ~±0.0002″ with multi-skim passes (geometry-dependent)

Sinker EDM Tolerance*

Typically ~±0.0005–0.001″; tighter by review on stable setups

Surface Finish

Fine finishes via skim passes; recast removal/polish on request

Fine Features

Wire down to ~0.004″ (0.10 mm); micro details by review

Materials

All conductive: tool steels, carbide, titanium, Inconel, stainless, copper alloys, aluminum

Process	Best For	Throughput	Notes
Wire EDM	Profiles, sharp internal corners, cutouts	High	Great accuracy; minimal burr; needs start hole unless edge start
Sinker EDM	Cavities, blind features, textures	Medium	Shaped electrode; excellent for deep pockets & ribs
EDM Drill (hole pop)	Starter holes in hard materials	Very High	Fast tiny holes for subsequent Wire EDM threading

Our EDM Capabilities

Precision Wire EDM profiling with multiple skim passes for tight tolerance & finish
4-axis taper cutting and complex interpolation where applicable
Sinker EDM for blind cavities, ribs, logos/mark features, and fine textures
Starter-hole “hole-pop” EDM (by review) for hard materials and small diameters
Workholding & flushing strategies for stability, accuracy, and repeatability
Material options include tool steels (A2, D2, H13), carbide, titanium, Inconel, stainless, copper alloys, aluminum (conductive)
Inspection support: dimensional reports, GO/NO-GO features, and FAIR/FAI on request
Post-EDM operations coordinated: deburr/recast removal, polish, heat treat, coating

Design for Manufacturability (DFM)

EDM requires conductivity — confirm alloy/temper; ceramics & most plastics are not EDMable.
Provide a clear start strategy: edge start or starter hole size/location (we can recommend).
For Wire EDM, internal corner radius ≈ wire radius + spark gap — allow “as sharp as process allows” where needed.
Call out critical datums/tolerances only where function demands; keep others at commercial to reduce cost.
Avoid trapped cavities without flushing paths for Sinker EDM; add vent/flush features when possible.
If parts will be coated or heat-treated, note pre/post process so we can adjust sizes/sequence.
Send STEP/IGES for geometry + PDF with material, thickness, finish, tolerances, and inspection needs.

Figures above are guidelines. We will review your drawing/CAD and confirm achievable specs with the best routing (partner selection, inspection plan, and finishing) before kickoff.

Common EDM Applications

Injection mold inserts, dies, and punch/blank tooling
Thin-wall aerospace details and heat-resistant alloy components
Medical instruments, implants, and fixture details
Electrical contacts, micro connectors, and precision slots
Sharp internal corners, keyways, and delicate webs
Prototype features in hardened steels or exotic alloys

EDM Machining FAQs

How do I get a same-day EDM quote?

Upload STEP/IGES + PDF with material, thickness, feature callouts, and any finish/inspection requests. We will route to the best-fit Canadian EDM partner for lead time and cost. Start your quote and we will respond quickly.

Is EDM work performed in-house or via partners?

EDM is coordinated through our vetted Canadian partner network under Pearson QA, documentation, and a single PO.

What tolerances and finishes are realistic?

Wire EDM can achieve ~±0.0002″ on suitable geometries with multi-skim passes; Sinker EDM commonly ~±0.0005–0.001″. We will confirm after reviewing your print and inspection plan.

Will EDM affect metallurgy?

EDM creates a small recast/heat-affected layer; for critical surfaces we can add skim passes or specify recast removal/electropolish.

Do you sign NDAs and provide inspection reports?

Yes. We regularly execute NDAs and can provide FAIR/FAI, CMM spot-checks, and Certificates of Conformance as requested. Start your quote and we will respond quickly.