VT machining provides CNC Press Brake Forming Spring Steel for customers who need accurate, repeatable Spring Steel components. Because Spring Steel is high yield strength and elastic recovery, we adapt the process to suit — controlling the variables that matter for this alloy.
Process Data for CNC Press Brake Forming Spring Steel
| Minimum inside bend radius | ~3 × t (across the grain) |
|---|---|
| Press force, 2 mm sheet, V16 die | ~40.7 t per metre |
| Typical springback at 90° | 2-4° |
| Angle tolerance | ±0.5° (CNC back-gauge, angle measurement on first part) |
| Tooling | Sectional punches, multi-V dies, hemming and offset tools |
Shown for Spring Steel (65Mn / SK5 / 1075), the most common Spring Steel grade we see for CNC Press Brake Forming. Typical values for Spring Steel (65Mn / SK5 / 1075), Annealed or hardened & tempered strip; confirmed on the first part.
CNC Press Brake Forming Capability for Spring Steel
- Tonnage matched to material
- Air, bottom & coining
- Repeatable bend angles
- Long-part capability
Spring Steel material properties, finishing options and grade notes are on our CNC Bending Spring Steel page.
How CNC Press Brake Forming Spring Steel Works
The Spring Steel 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 Press Brake Forming Spring Steel
| 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 Press Brake Forming Spring Steel
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 Spring Steel. If you send your model early, we will return practical DFM feedback before you commit to production.
CNC Press Brake Forming Tolerances & Surface Finish
Formed Spring Steel 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 Press Brake Forming Spring Steel
Customers order CNC Press Brake Forming Spring Steel 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 Spring Steel Parts for CNC Press Brake Forming
Illustrative examples of CNC Press Brake Forming Spring Steel 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.
Hemmed panel edge
- Material
- Spring Steel
- Size
- 400 mm hem, 1.2 mm
- Key callouts
- Hem flat to 0.3 mm
- Batch
- 1,500 pcs
Hemmed to remove the sharp edge without a secondary deburr operation.
U-channel
- Material
- Spring Steel
- Size
- 800 mm long, 3 mm thick
- Key callouts
- Angle ±0.5°, straightness 1 mm over length
- Batch
- 250 pcs
Formed in two hits with a rotating die to avoid marking the outside face.
Chassis with countersinks
- Material
- Spring Steel
- 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.
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 Press Brake Forming Spring Steel
- 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 Spring Steel 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 Press Brake Forming
Other Processes for Spring Steel
Send the drawing, the Spring Steel 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 surface finish is achievable on Spring Steel with CNC Press Brake Forming?
Surface finish on Spring Steel is controlled to your specification; we confirm the achievable Ra against your callout.
What tolerances can you hold for CNC Press Brake Forming Spring Steel?
Achievable tolerances for Spring Steel forming depend on the alloy, geometry and feature size. We hold tight, repeatable tolerances appropriate to the feature and material. Exact figures are confirmed against your drawing callouts.
How clean are the edges produced by CNC Press Brake Forming on Spring Steel?
Machined Spring Steel edges are clean and to specification; edge-break or deburring is added when your drawing calls for it.
Why is Spring Steel a good choice for CNC Press Brake Forming?
Spring Steel is high yield strength and elastic recovery, which makes it well suited to CNC Press Brake Forming. We tune the process to the alloy so the finished Spring Steel forming part meets your dimensional and functional requirements.
Does CNC Press Brake Forming Spring Steel require dedicated tooling?
Most Spring Steel forming work uses standard cutting tools and CNC programs; dedicated fixtures are made only when geometry or volume requires them.