VT machining specialises in CNC Sinker EDM 6061 Aluminum. Because 6061 Aluminum is lightweight with excellent machinability, and its machinability is excellent; high cutting speeds and superb finishes achievable, we plan each job around the grade to protect accuracy and surface quality.
CNC Sinker EDM Capability for 6061 Aluminum
- Lightweight (~2.7 g/cm³)
- Excellent machinability
- Tolerance to ±0.01 mm
- Anodising-ready
6061 Aluminum Material Data
| Density | 2.70 g/cm³ |
|---|---|
| Tensile strength | 310 MPa |
| Yield strength (0.2%) | 276 MPa |
| Hardness | 95 HB |
| Melting point | 582–652 °C |
| Thermal conductivity | 167 W/m·K |
| Thermal expansion | 23.6 ×10⁻⁶/K |
| Electrical conductivity | 43% |
| Machinability (C36000 = 100%) | 190% |
| Grades we run | 6061, 6082, 6063, 7075-T6, 5052, 2024-T3, MIC-6 cast plate |
Published typical values for 6061-T6. Other grades in the family differ — the certificate supplied with your order carries the actual heat-lot figures.
Thin walls relax after roughing. We rough, let the part stabilise, then finish — otherwise a 1.5 mm wall bows by more than the tolerance it was cut to.
Machining 6061 Aluminum with CNC Sinker EDM
When EDM machining 6061 Aluminum, machinability is excellent; high cutting speeds and superb finishes achievable. Our process plan reflects this so the finished part holds its tolerances without distortion or poor finish.
Documented parameters for 6061 Aluminum mean predictable cycle times and stable, repeatable results.
Achievable Tolerances for CNC Sinker EDM 6061 Aluminum
| 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.
Secondary Operations & Finishing
Most 6061 Aluminum parts need some finishing, which we manage in-house or through vetted partners. Options include deburring and edge-breaking, heat treatment, surface grinding, polishing, and plating or anodising for corrosion resistance and appearance. Give us the finished-part requirement and we will sequence every operation correctly.
CNC Sinker EDM Tolerances & Surface Finish
EDM holds tolerances to roughly ±0.002–0.005 mm with no cutting force on the 6061 Aluminum part, producing fine, controlled surface textures and sharp internal corners impossible to mill.
Exact achievable figures depend on the alloy, the feature size and the part geometry. Tell us which dimensions are critical and we will advise feasibility up front.
Design Tips for CNC Sinker EDM 6061 Aluminum
Small design adjustments often cut cost and lead time. EDM suits sharp internal corners, thin ribs and hardened 6061 Aluminum 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.
CNC Sinker EDM Quality & Inspection
Quality is built in, not inspected on. We monitor key features during the run and confirm them at final inspection, with CMM verification available for tight tolerances. We provide the inspection and traceability records your quality system requires.
Why 6061 Aluminum?
Customers select 6061 Aluminum for CNC Sinker EDM because it is lightweight with excellent machinability. We handle grade verification and any required heat treatment or finishing.
Applications of CNC Sinker EDM 6061 Aluminum
6061 Aluminum parts made this way are found throughout aerospace, medical, automotive, electronics and industrial equipment. Prototype, bridge and production volumes are all welcome.
How to Order CNC Sinker EDM 6061 Aluminum
Starting your project takes one email. Send your CAD or 2D drawing, the 6061 Aluminum 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.
Finishing Options for 6061 Aluminum
| Finish | Thickness / effect | Why it gets specified |
|---|---|---|
| Clear anodise (Type II) | 5–25 µm | Corrosion protection, keeps the natural colour |
| Colour anodise | 10–25 µm | Black, red, blue, gold; add 0.02 mm to close tolerances |
| Hard anodise (Type III) | 25–50 µm | 60–70 HRC surface, grows 50% into the part |
| Chromate / Alodine 1200 | < 1 µm | Conductive, meets MIL-DTL-5541 |
| Powder coat | 60–120 µm | RAL colours, needs 0.3 mm clearance on mating features |
| Deburr / edge break | 0.05–0.3 mm | All parts unless the drawing says otherwise |
| Bead blast | Ra 1.6–3.2 µm | Uniform matt finish, hides tool marks |
| Laser marking | — | Part number, lot code, data matrix |
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 6061 Aluminum
- 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 6061 Aluminum 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.
6061 Aluminum in Other Processes
Related
Send the drawing, the 6061 Aluminum condition and the quantity — pricing and lead time come back the same or next business day.
Request a QuoteFrequently Asked Questions
Can VT machining make custom 6061 Aluminum parts to my drawing?
Yes. 6061 Aluminum 6061 Aluminum EDM machining is made to order from your CAD/2D drawing. Share your geometry, material grade, tolerance and quantity and we will confirm feasibility, lead time and pricing.
How clean are the edges produced by CNC Sinker EDM on 6061 Aluminum?
Machined 6061 Aluminum edges are clean and to specification; edge-break or deburring is added when your drawing calls for it.
Can you EDM-machine hardened 6061 Aluminum?
Yes. EDM removes material by electrical discharge rather than cutting force, so hardened and difficult 6061 Aluminum can be machined to fine detail and tight tolerance without distortion.
What tolerances can you hold for CNC Sinker EDM 6061 Aluminum?
Achievable tolerances for 6061 Aluminum 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.