VT machining specialises in CNC Sinker EDM Grade 4 Titanium. Because Grade 4 Titanium is high strength-to-weight, biocompatible and corrosion resistant, and its machinability is difficult; low speeds, high feeds, flood coolant to manage heat, we plan each job around the grade to protect accuracy and surface quality.
CNC Sinker EDM Capability for Grade 4 Titanium
- High strength-to-weight
- Biocompatible
- Corrosion resistant
- Tolerance to ±0.01 mm
Grade 4 Titanium Material Data
| Density | 4.43 g/cm³ |
|---|---|
| Tensile strength | 950 MPa |
| Yield strength (0.2%) | 880 MPa |
| Hardness | 334 HB / 36 HRC |
| Melting point | 1604–1660 °C |
| Thermal conductivity | 6.7 W/m·K |
| Thermal expansion | 8.6 ×10⁻⁶/K |
| Electrical conductivity | 3.1% |
| Machinability (C36000 = 100%) | 22% |
| Grades we run | Gr 1, Gr 2 (CP), Gr 5 Ti-6Al-4V, Gr 23 ELI, Gr 7, Gr 9 |
Published typical values for Ti-6Al-4V (Gr 5). Other grades in the family differ — the certificate supplied with your order carries the actual heat-lot figures.
Heat has nowhere to go — thermal conductivity is 1/25th of aluminium, so it all goes into the tool. Low surface speed, heavy feed, flood coolant, and the cutter never stops moving.
Machining Grade 4 Titanium with CNC Sinker EDM
The machinability of Grade 4 Titanium is difficult; low speeds, high feeds, flood coolant to manage heat. For CNC Sinker EDM we select tooling, feeds, speeds and coolant to match, keeping the Grade 4 Titanium workpiece stable and the result accurate.
Because we machine Grade 4 Titanium regularly, proven settings shorten setup and keep quality repeatable across reorders.
Achievable Tolerances for CNC Sinker EDM Grade 4 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 Quality & Inspection
Consistent quality comes from disciplined process control. Critical dimensions on Grade 4 Titanium parts are checked in-process and verified at final inspection using calibrated instruments and, where required, CMM measurement. Full documentation — dimensional reports, mill certs, FAIR — is available when your programme needs it.
Design Tips for CNC Sinker EDM Grade 4 Titanium
A few design choices make a real difference to cost and quality. EDM suits sharp internal corners, thin ribs and hardened Grade 4 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.
Secondary Operations & Finishing
We complete Grade 4 Titanium components with the secondary steps your drawing calls for. We arrange heat treatment, surface treatment, marking and assembly as needed. Tell us the final spec and we will plan the full route so parts arrive ready to use.
Why Grade 4 Titanium?
Specifying Grade 4 Titanium for CNC Sinker EDM Grade 4 Titanium is usually about its properties: high strength-to-weight, biocompatible and corrosion resistant. Tell us the condition you need and we machine to it.
CNC Sinker EDM Tolerances & Surface Finish
EDM holds tolerances to roughly ±0.002–0.005 mm with no cutting force on the Grade 4 Titanium 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.
Applications of CNC Sinker EDM Grade 4 Titanium
CNC Sinker EDM of Grade 4 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.
How to Order CNC Sinker EDM Grade 4 Titanium
Ordering Grade 4 Titanium parts is straightforward. Provide the drawing, material, quantity and any certification needs. Our engineers reply — in English — with feasibility, pricing and a realistic lead time, usually within one business day.
Finishing Options for Grade 4 Titanium
| Finish | Thickness / effect | Why it gets specified |
|---|---|---|
| Type II anodise | — | Colour coding, biocompatible |
| Type III anodise | — | Anti-galling for threaded and sliding parts |
| Passivation | — | ASTM F86 for implant-grade parts |
| Electropolish | 5–20 µm removed | Removes the machining layer for medical use |
| 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 Grade 4 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 Grade 4 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.
Grade 4 Titanium in Other Processes
Related
Send the drawing, the Grade 4 Titanium 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 Grade 4 Titanium parts to my drawing?
Yes. Grade 4 Titanium Grade 4 Titanium 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.
What material thickness or size range suits CNC Sinker EDM Grade 4 Titanium?
We machine Grade 4 Titanium across a broad size range; share your part envelope for confirmation.
Can you EDM-machine hardened Grade 4 Titanium?
Yes. EDM removes material by electrical discharge rather than cutting force, so hardened and difficult Grade 4 Titanium can be machined to fine detail and tight tolerance without distortion.
Why is Grade 4 Titanium a good choice for CNC Sinker EDM?
Grade 4 Titanium is high strength-to-weight, biocompatible and corrosion resistant, which makes it well suited to CNC Sinker EDM. We tune the process to the alloy so the finished Grade 4 Titanium EDM machining part meets your dimensional and functional requirements.
Which industries use CNC Sinker EDM Grade 4 Titanium parts?
CNC Sinker EDM Grade 4 Titanium parts are used across aerospace, medical, automotive, electronics, semiconductor and general industrial sectors — anywhere precise Grade 4 Titanium components are required.
How clean are the edges produced by CNC Sinker EDM on Grade 4 Titanium?
Machined Grade 4 Titanium edges are clean and to specification; edge-break or deburring is added when your drawing calls for it.