VT machining provides CNC Saw Cutting Invar for customers who need accurate, repeatable Invar components. Because Invar is ultra-low thermal expansion, we adapt the process to suit — controlling the variables that matter for this alloy.
Process Data for CNC Saw Cutting Invar
| Bandsaw blade speed | 20-40 m/min |
|---|---|
| Blade | Carbide-tipped or M42 bi-metal, variable pitch |
| Length tolerance | ±0.2 mm (bandsaw) / ±0.1 mm (circular) |
Shown for Invar 36, the most common Invar grade we see for CNC Saw Cutting. Typical values for Invar 36, Annealed; confirmed on the first part.
CNC Saw Cutting Capability for Invar
- Length tolerance ±0.2 mm
- Bar, tube & plate
- Bundle cutting
- Square-cut faces
Invar material properties, finishing options and grade notes are on our CNC Bending Invar page.
How CNC Saw Cutting Invar Works
The Invar blank is bent or formed against tooling under CNC-controlled ram travel and back-gauge positioning. Bend allowance and springback are compensated in the program so finished angles hit the print.
Programming is driven directly by your 3D model or print. Work-holding, tool selection and the cutting strategy are planned around the critical features and the material before the first chip is cut. First-off inspection confirms the process is centred before production continues.
Achievable Tolerances for CNC Saw Cutting Invar
| Feature | Standard | Precision |
|---|---|---|
| Bend angle | ±1.0° | ±0.5° |
| Flange length | ±0.30 mm | ±0.15 mm |
| Hole-to-bend distance | ±0.30 mm | ±0.15 mm |
| Minimum inside radius | 1.0 × thickness | 0.8 × thickness |
| Minimum flange height | 4 × thickness + radius | 3 × thickness + radius |
| Bend-to-bend spacing | ±0.30 mm | ±0.15 mm |
| Sheet thickness range | 0.5–8.0 mm | 0.5–4.0 mm |
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 Saw Cutting Invar
We are happy to suggest design tweaks that improve manufacturability. Consistent bend radii, adequate flange lengths and grain-direction awareness reduce cracking and springback in formed Invar. If you send your model early, we will return practical DFM feedback before you commit to production.
CNC Saw Cutting Tolerances & Surface Finish
Formed Invar holds bend angles to about ±0.5° and consistent flange dimensions, with bend allowance compensated for the material and thickness.
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.
Applications of CNC Saw Cutting Invar
Customers order CNC Saw Cutting Invar 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.
Typical Invar Parts for CNC Saw Cutting
Illustrative examples of CNC Saw Cutting Invar 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.
Chassis with countersinks
- Material
- Invar
- Size
- 450 × 300 × 2 mm
- Key callouts
- Countersink depth ±0.1 mm, 6 bends
- Batch
- 700 pcs
Countersinks formed before bending while the sheet is still flat and supported.
Sheet-metal enclosure
- Material
- Invar
- Size
- 300 × 200 × 120 mm
- Key callouts
- Bend angle ±0.5°, diagonal ±0.5 mm
- Batch
- 400 pcs
Bend sequence chosen so no flange collides with the tool on the last hit.
Mounting bracket
- Material
- Invar
- Size
- 120 × 60 mm, 2 bends
- Key callouts
- Angle ±0.5°, hole-to-bend ±0.15 mm
- Batch
- 3,000 pcs
Holes placed at least 2.5 × thickness from the bend line so they do not distort.
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 Saw Cutting Invar
- 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 Invar 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 Saw Cutting
Other Processes for Invar
Send the drawing, the Invar grade and the quantity. You get pricing, lead time and any DFM notes back — usually within one business day.
Request a QuoteFrequently Asked Questions
What material thickness or size range suits CNC Saw Cutting Invar?
We form Invar sheet and plate to your developed flat pattern and bend sequence.
Can VT machining make custom Invar parts to my drawing?
Yes. Invar forming 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.
Which industries use CNC Saw Cutting Invar parts?
CNC Saw Cutting Invar parts are used across aerospace, medical, automotive, electronics, semiconductor and general industrial sectors — anywhere precise Invar components are required.
Does CNC Saw Cutting Invar require dedicated tooling?
Most Invar forming work uses standard cutting tools and CNC programs; dedicated fixtures are made only when geometry or volume requires them.
What surface finish is achievable on Invar with CNC Saw Cutting?
Surface finish on Invar is controlled to your specification; we confirm the achievable Ra against your callout.