CNC Sinker EDM at VT machining covers a broad range of metals and grades, each processed to your drawing with parameters tuned to the alloy.
Sinker (die-sink) EDM burns a shaped electrode into metal to form precise cavities and blind features. Every job is programmed from your geometry, run on calibrated equipment and checked against the print before it ships.
Design your CNC Sinker EDM part online — free 3D + 2D drawing builder
No CAD licence, no sign-up, no cost. Set your metal, dimensions and features in the browser, see the part update live in 3D, switch to 2D to add dimensions and tolerances, then send the drawing straight to our cnc sinker edm team for a quotation.
Live 3D preview — rotate, zoom and explode the model as you type
Built-in 2D drawing sheet with dimensions, tolerances and notes
Download the preview or send it with your RFQ in one click
Free to use, unlimited revisions, nothing to install
VT CNC Machining3D
Wire EDM BuilderConfigure wire EDM cut metal parts: precision profiles, openings, slots and fine features cut in hardened or conductive metals with no cutting force. Every builder includes the Freeform Corner & Region Editor: cut or add material of any shape directly on the 3D model, then submit an RFQ.This tool is for visual configuration only. Final dimensions, tolerances, materials, coatings, and manufacturability will be reviewed from your drawing or specification.
Paste a configuration JSON (from Export) or a copied RFQ summary. The product and all recognized parameters are applied automatically; unknown parameters are listed and skipped.
Answer the choices below step by step — every value comes from the real option list, so it always renders.
Save the current configuration under a name and recall it any time on this device.
2D PreviewYour browser is showing a simplified engineering preview because WebGL is unavailable.
Wire EDM Builder
Interactive visual preview for custom CNC machining configuration.
CMD
Import Code (One-Click Recall)
Save this code before you leave — it is the only way to recall this exact model. If you lose it, your configuration cannot be restored.
SUBMIT RFQ — ENGINEERING REVIEWYour current 3D configuration and specification summary are attached automatically. Attach a drawing if you have one.
FREQUENTLY ASKED QUESTIONSWhen should I choose wire EDM over milling or laser cutting?
Wire EDM cuts hardened and conductive metals with no cutting force, holding tight tolerance on fine internal profiles, sharp corners and thick sections that lasers and cutters struggle with. Sinker EDM and EDM drilling are also available.
What accuracy can wire EDM hold?
Typical wire EDM tolerance is +/- 0.005 mm with excellent edge quality and no burrs, in tool steel, carbide, titanium and other conductive metals.
CNC Sinker EDM removes metal through controlled electrical discharges between an electrode (or wire) and the workpiece across a dielectric gap. There is no mechanical cutting force, so hardened tool steel, carbide and superalloys can be cut to sharp internal corners and very tight tolerances.
Our shop runs CNC Sinker EDM daily, which means proven parameters and short setup times. Sinker (die-sink) EDM burns a shaped electrode into metal to form precise cavities and blind features. Upload your geometry — or draw it in the free builder on this page — and we will come back with pricing and DFM notes.
How CNC Sinker EDM Works at VT machining
Material is removed from the metal workpiece by controlled electrical discharges across a dielectric gap, with no mechanical contact. Flushing, on/off pulse timing and electrode/wire feed are set to balance speed against surface finish.
We start from your supplied geometry and tolerance scheme. The setup is designed to minimise re-clamping, which protects positional accuracy across features. A first article is verified against the drawing before the balance of the batch is released.
1
Send your drawing
CAD model, PDF print — or a drawing you build free on this page. We reply with feasibility, price and lead time.
2
Electrode / wire path programming
Pulse timing, flushing and offsets are set to balance speed against surface finish.
3
CNC Sinker EDM run
First article is verified against the print before the balance of the batch is released.
4
Inspection & dispatch
In-process checks plus final inspection, with CMM reports, mill certs and FAIR on request.
CNC Sinker EDM Tolerances & Surface Finish
EDM holds tolerances to roughly ±0.002–0.005 mm with no cutting force on the metal part, producing fine, controlled surface textures and sharp internal corners impossible to mill.
The tightest tolerances are reserved for the features your drawing flags as critical. Share your tolerance scheme and we will confirm what is realistic before quoting.
CNC Sinker EDM — capability summary
Work envelope
Up to 500 × 350 × 250 mm
Wire diameter
0.1–0.3 mm
Tolerance
±0.002–0.005 mm
Corner radius
From 0.05 mm internal
Materials
Hardened steel, carbide, Inconel, titanium
Lead time
Prototypes 5–10 days · production 10–20 days
Documentation
Dimensional report, material certificate, FAIR on request
Figures are typical in-house capability. Send your drawing and we will confirm what is achievable for your specific part.
CNC Sinker EDM by Metal — Choose Your Material
Each material page covers how CNC Sinker EDM behaves in that alloy, what tolerances are realistic and where the parts are used.
We are happy to suggest design tweaks that improve manufacturability. EDM suits sharp internal corners, thin ribs and hardened metal 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.
Secondary Operations & Finishing
Finished metal 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 Sinker EDM 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 metal part to print. Inspection reports, material certificates and first-article documentation can be supplied on request.
Industries That Order CNC Sinker EDM
CNC Sinker EDM parts made by VT machining go into the sectors below. Each page lists the typical components, preferred alloys and the tolerance expectations for that industry.
Starting your project takes one email. Send your CAD or 2D drawing, the metal grade and condition, the quantity and any finish or inspection requirements. We respond quickly with price, lead time and any DFM notes, in clear English.
Have a drawing ready? Send it with your quantity and material for a quotation, usually within one business day.
Yes. EDM removes material by electrical discharge rather than cutting force, so hardened and difficult can be machined to fine detail and tight tolerance without distortion.
What is CNC Sinker EDM and how is it done?
CNC Sinker EDM refers to sinker (die-sink) EDM burns a shaped electrode into metal to form precise cavities and blind features. VT machining produces each part to your CAD drawing, selecting parameters from your tolerance, finish and quantity requirements.
What is the typical lead time and minimum order for CNC Sinker EDM?
CNC Sinker EDM prototypes for can be produced quickly and scaled to series production. Send your drawing and quantity and we will advise lead time and any minimum order.
Which industries use CNC Sinker EDM parts?
CNC Sinker EDM parts are used across aerospace, medical, automotive, electronics, semiconductor and general industrial sectors — anywhere precise components are required.
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