VT machining specialises in CNC Swiss Machining Inconel 718. Because Inconel 718 is high-temperature strength and oxidation resistance, and its machinability is very difficult; rigid setups, carbide/ceramic tooling, low speeds, we plan each job around the grade to protect accuracy and surface quality.
CNC Swiss Machining Capability for Inconel 718
- High-temperature strength
- Oxidation resistant
- Tolerance to ±0.01 mm
- Aerospace-grade
Inconel 718 Material Data
| Density | 8.19 g/cm³ |
|---|---|
| Tensile strength | 1375 MPa |
| Yield strength (0.2%) | 1100 MPa |
| Hardness | 36–44 HRC |
| Melting point | 1260–1336 °C |
| Thermal conductivity | 11.4 W/m·K |
| Thermal expansion | 13.0 ×10⁻⁶/K |
| Electrical conductivity | 1.4% |
| Machinability (C36000 = 100%) | 12–15% |
| Grades we run | 600, 625, 718, X-750, 725 |
Published typical values for Inconel 718 (aged). Other grades in the family differ — the certificate supplied with your order carries the actual heat-lot figures.
Tool life is measured in minutes, not hours. Ceramic or coated-carbide tooling, low surface speed, high pressure coolant, and a scheduled tool change rather than waiting for failure.
Machining Inconel 718 with CNC Swiss Machining
Inconel 718 behaves predictably under CNC Swiss Machining once parameters are dialled in: machinability is very difficult; rigid setups, carbide/ceramic tooling, low speeds, and we tune the operation accordingly.
We hold reference parameters for this grade, so repeat orders of Inconel 718 run consistently from one batch to the next.
Achievable Tolerances for CNC Swiss Machining Inconel 718
| Feature | Standard | Precision |
|---|---|---|
| Outside diameter | ±0.05 mm | ±0.005 mm |
| Bore diameter | H9 | H6 |
| Length / shoulder position | ±0.10 mm | ±0.020 mm |
| Concentricity OD to ID | 0.05 mm TIR | 0.010 mm TIR |
| Roundness | 0.02 mm | 0.005 mm |
| Thread class | 6g / 2A | 4h / 3A |
| Surface finish, as turned | Ra 1.6 µm | Ra 0.4 µm |
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.
Design Tips for CNC Swiss Machining Inconel 718
We are happy to suggest design tweaks that improve manufacturability. Consistent diameters, standard thread forms and avoiding extremely long, slender features help Inconel 718 turned parts stay concentric and economical. If you send your model early, we will return practical DFM feedback before you commit to production.
Secondary Operations & Finishing
Finished Inconel 718 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 Swiss Machining Tolerances & Surface Finish
Turned Inconel 718 holds diameter tolerances to about ±0.005 mm with concentricity within 0.01 mm and good roundness. Turned finishes of Ra 0.4–0.8 µm are achievable with finishing passes and sharp tooling.
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.
CNC Swiss Machining 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 Inconel 718 part to print. Inspection reports, material certificates and first-article documentation can be supplied on request.
Why Inconel 718?
Inconel 718 is chosen when a part needs what this grade offers — it is high-temperature strength and oxidation resistance. We confirm the grade and any temper or heat-treat condition with you before machining.
Applications of CNC Swiss Machining Inconel 718
Customers order CNC Swiss Machining Inconel 718 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 Swiss Machining Inconel 718
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.
Finishing Options for Inconel 718
| Finish | Thickness / effect | Why it gets specified |
|---|---|---|
| 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 Swiss Machining Inconel 718
- 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 Inconel 718 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.
Inconel 718 in Other Processes
Related
Send the drawing, the Inconel 718 condition and the quantity — pricing and lead time come back the same or next business day.
Request a QuoteFrequently Asked Questions
Why is Inconel 718 a good choice for CNC Swiss Machining?
Inconel 718 is high-temperature strength and oxidation resistance, which makes it well suited to CNC Swiss Machining. We tune the process to the alloy so the finished Inconel 718 turning part meets your dimensional and functional requirements.
What is CNC Swiss Machining Inconel 718 and how is it done?
CNC Swiss Machining Inconel 718 refers to swiss-type machining guides bar stock through a sliding headstock for high-accuracy small, slender parts. Applied to Inconel 718 — high-temperature strength and oxidation resistance — VT machining produces each part to your CAD drawing, selecting parameters from your tolerance, finish and quantity requirements.
What surface finish is achievable on Inconel 718 with CNC Swiss Machining?
Surface finish on Inconel 718 is controlled to your specification; we confirm the achievable Ra against your callout.
What is the typical lead time and minimum order for CNC Swiss Machining Inconel 718?
CNC Swiss Machining prototypes for Inconel 718 can be produced quickly and scaled to series production. Send your drawing and quantity and we will advise lead time and any minimum order.
What tolerances can you hold for CNC Swiss Machining Inconel 718?
Achievable tolerances for Inconel 718 turning depend on the alloy, geometry and feature size. Turning holds diameter tolerances to around ±0.005 mm with concentricity within 0.01 mm. Exact figures are confirmed against your drawing callouts.