Looking for reliable CNC Sinker EDM Titanium? VT machining manufactures Titanium parts to tight tolerances and consistent quality. Titanium is high strength-to-weight, biocompatible, corrosion resistant, so the process is set up specifically for the material.
Process Data for CNC Sinker EDM Titanium
| Electrode | Graphite (roughing) / copper (fine finish) |
|---|---|
| Relative removal rate | Medium (vs tool steel = medium) |
| Best finish | VDI 12-18 (Ra 0.4-0.8 µm) |
Shown for Grade 5 Titanium, the most common Titanium grade we see for CNC Sinker EDM. Typical values for Grade 5 Titanium, Annealed; confirmed on the first part.
CNC Sinker EDM Capability for Titanium
- Blind cavities & ribs
- Fine surface (VDI grades)
- Tolerance to ±0.005 mm
- Hardened tool steel
Titanium material properties, finishing options and grade notes are on our CNC Wire EDM Titanium page.
How CNC Sinker EDM Titanium Works
Material is removed from the Titanium 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.
Every job begins from your CAD model or 2D drawing. Fixturing and tool paths are planned so the most critical dimensions are produced in the most rigid, repeatable setup. Critical dimensions are checked on the first part and monitored through the run.
Achievable Tolerances for CNC Sinker EDM Titanium
| Feature | Standard | Precision |
|---|---|---|
| Profile dimension | ±0.010 mm | ±0.002 mm |
| Internal corner radius | 0.15 mm | 0.05 mm |
| Taper control over 50 mm | 0.02 mm | 0.005 mm |
| Surface finish (skim passes) | Ra 0.8 µm | Ra 0.2 µm |
| Recast layer | 10 µm | 2 µm (fine skim) |
| Start-hole diameter | 1.0 mm | 0.25 mm |
| Workpiece hardness | no limit (conductive) | no limit (conductive) |
Standard is what a normal quotation assumes. Precision is available on nominated features and is priced separately, because it needs extra setups, in-process gauging and CMM verification. Call out only the features that need it — blanket-tightening a drawing is the single most common reason a quote comes back expensive.
CNC Sinker EDM Tolerances & Surface Finish
EDM holds tolerances to roughly ±0.002–0.005 mm with no cutting force on the Titanium 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 Sinker EDM Titanium
A few design choices make a real difference to cost and quality. EDM suits sharp internal corners, thin ribs and hardened Titanium 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.
Applications of CNC Sinker EDM Titanium
CNC Sinker EDM of Titanium supports parts across aerospace, medical, automotive, electronics, semiconductor, energy and general industrial sectors. We scale from one-off prototypes to ongoing production while holding the same quality.
Typical Titanium Parts for CNC Sinker EDM
Illustrative examples of CNC Sinker EDM Titanium parts and the callouts that usually drive the process plan. They show the kind of work that fits this process; they are not specific customer orders.
Carbide punch
- Material
- Titanium
- Size
- Ø6 × 45 mm
- Key callouts
- OD ±0.003 mm, sharp form retained
- Batch
- 250 pcs
Carbide is EDM or grind only; there is no milling route.
Micro slot in nozzle
- Material
- Titanium
- Size
- 0.15 mm wide × 6 mm deep
- Key callouts
- Width ±0.003 mm
- Batch
- 400 pcs
Cut with 0.1 mm wire; the start hole is EDM-drilled at Ø0.3 mm.
Extrusion die
- Material
- Titanium
- Size
- 120 × 120 × 25 mm
- Key callouts
- Profile ±0.005 mm, internal corner R0.1 mm
- Batch
- 35 pcs
Cut in four skim passes; the first pass is speed, the last three are finish and accuracy.
No drawing yet? Build one in the browser.
Set the metal, dimensions and features, watch the 3D model update as you type, then switch to the 2D sheet to add dimensions and tolerances. Download it or send it straight to us with your RFQ.
What We Need to Quote CNC Sinker EDM Titanium
- GeometrySTEP or IGES for the 3D model, plus a PDF drawing if you have tolerance callouts. A dimensioned sketch is enough to start.
- MaterialThe exact Titanium grade and condition — temper, heat-treat state or hardness. If you are not sure, tell us the function and we will suggest one.
- QuantityPrototype count and the expected annual volume. Both change how the part is made and therefore what it costs.
- TolerancesWhich features are critical. Everything else runs to our standard tolerance, which is what keeps the price sensible.
- FinishSurface treatment, cosmetic requirements, and any faces that must be masked.
- DocumentsWhether you need a material certificate, dimensional report, FAIR or PPAP with the shipment.
Missing something from the list is not a problem — send what you have. We will come back with the specific questions rather than a generic form.
Other Metals for CNC Sinker EDM
Other Processes for Titanium
Send the drawing, the Titanium grade and the quantity. You get pricing, lead time and any DFM notes back — usually within one business day.
Request a QuoteFrequently Asked Questions
Does CNC Sinker EDM Titanium require dedicated tooling?
Wire EDM needs no shaped tooling; sinker EDM uses a shaped electrode we produce in-house for your cavity.
What material thickness or size range suits CNC Sinker EDM Titanium?
We machine Titanium across a broad size range; share your part envelope for confirmation.
Can you EDM-machine hardened Titanium?
Yes. EDM removes material by electrical discharge rather than cutting force, so hardened and difficult Titanium can be machined to fine detail and tight tolerance without distortion.
What tolerances can you hold for CNC Sinker EDM Titanium?
Achievable tolerances for Titanium EDM machining depend on the alloy, geometry and feature size. EDM holds tolerances to around ±0.002 mm with no cutting force on the part. Exact figures are confirmed against your drawing callouts.
Which industries use CNC Sinker EDM Titanium parts?
CNC Sinker EDM Titanium parts are used across aerospace, medical, automotive, electronics, semiconductor and general industrial sectors — anywhere precise Titanium components are required.
What is CNC Sinker EDM Titanium and how is it done?
CNC Sinker EDM Titanium refers to sinker (die-sink) EDM burns a shaped electrode into metal to form precise cavities and blind features. Applied to Titanium — high strength-to-weight, biocompatible, corrosion resistant — VT machining produces each part to your CAD drawing, selecting parameters from your tolerance, finish and quantity requirements.