CNC EDM Drilling 309S Stainless Steel

CNC EDM Drilling 309S Stainless Steel from VT machining delivers precision 309S Stainless Steel parts made to your exact drawing. Fast-hole EDM drilling produces small, deep holes in hard metals, including starter holes for wire EDM, with parameters tuned to 309S Stainless Steel, which is corrosion resistant, strong and hygienic.

CNC EDM Drilling Capability for 309S Stainless Steel

• Austenitic/martensitic grades
• Corrosion resistant
• Tolerance to ±0.01 mm
• Typical hardness 70–200 HB (annealed)

Machining 309S Stainless Steel with CNC EDM Drilling

309S Stainless Steel behaves predictably under CNC EDM Drilling once parameters are dialled in: machinability is moderate; work-hardens, so positive-rake tooling and steady feeds are used to avoid glazing, and we tune the operation accordingly.

We hold reference parameters for this grade, so repeat orders of 309S Stainless Steel run consistently from one batch to the next.

CNC EDM Drilling Tolerances & Surface Finish

EDM holds tolerances to roughly ±0.002–0.005 mm with no cutting force on the 309S Stainless Steel part, producing fine, controlled surface textures and sharp internal corners impossible to mill.

Final tolerances are governed by the material's behaviour, wall thickness and overall stiffness. We give honest DFM feedback if a callout would be costly or better achieved another way.

Design Tips for CNC EDM Drilling 309S Stainless Steel

We are happy to suggest design tweaks that improve manufacturability. EDM suits sharp internal corners, thin ribs and hardened 309S Stainless Steel that cannot be milled; allowing a small corner radius where possible speeds the cut. If you send your model early, we will return practical DFM feedback before you commit to production.

Why 309S Stainless Steel?

309S Stainless Steel is chosen when a part needs what this grade offers — it is corrosion resistant, strong and hygienic. We confirm the grade and any temper or heat-treat condition with you before machining.

Secondary Operations & Finishing

Finished 309S Stainless Steel parts can move straight into secondary operations under one roof. Typical add-ons are deburring, passivation, anodising, plating, blasting, polishing and laser marking. We coordinate the whole chain so you receive complete, inspection-ready parts.

CNC EDM Drilling Quality & Inspection

We control quality throughout the process, not just at the end. In-process checks plus final inspection — including CMM where specified — keep every 309S Stainless Steel part to print. Inspection reports, material certificates and first-article documentation can be supplied on request.

Applications of CNC EDM Drilling 309S Stainless Steel

Customers order CNC EDM Drilling 309S Stainless Steel components for everything from instrumentation to structural and functional assemblies. Whether you need a single prototype or recurring production volume, the same process discipline applies.

How to Order CNC EDM Drilling 309S Stainless Steel

Getting a quote is simple. Share your model, the material grade, your quantity and target tolerances. You receive a clear quotation with lead time and honest manufacturability feedback.

309S Stainless Steel in Other Processes

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