Sinker EDM uses a shaped electrode to form cavities in conductive workpieces. It can complement milling for deep ribs, difficult internal features and tooling geometries with limited cutter access.
Typical parts and project fit
This process is considered for mold cavities, deep ribs and tooling details. Tecpreva reviews the drawing, material condition, quantity and functional requirements before confirming the production route.
Drawing and inspection checklist
Identify electrode geometry, cavity depth, electrode wear and surface integrity. Supply a revision-controlled 2D drawing, STEP model, finish specification and critical dimensions. Machine positioning accuracy alone does not define achievable part tolerance.
Why does sinker EDM need an electrode?
The electrode defines the cavity geometry. Electrode manufacture and wear affect price, schedule and repeatability, so they should be included in the quotation and inspection review.
From first article to repeat production
Agree the fixture and datum strategy, first-article checks, sampling plan and dimensional report scope before production. Record revisions and protect functional surfaces during finishing and packing.