Looking for reliable CNC Bending Copper? VT machining manufactures Copper parts to tight tolerances and consistent quality. Copper is excellent electrical and thermal conductivity, so the process is set up specifically for the material.
Process Data for CNC Bending Copper
| Minimum inside bend radius | ~0.5 × t (across the grain) |
|---|---|
| Press force, 2 mm sheet, V16 die | ~9.2 t per metre |
| Typical springback at 90° | 0.5-1° |
| Angle tolerance | ±0.5° (CNC back-gauge, angle measurement on first part) |
Shown for C110 Copper, the most common Copper grade we see for CNC Bending. Typical values for C110 Copper, Annealed or H02; confirmed on the first part.
CNC Bending Capability for Copper
- Angle accuracy ±0.5°
- Back-gauge positioning
- Bend allowance control
- Multi-bend sequencing
Copper Material Data
| Density | 8.94 g/cm³ |
|---|---|
| Tensile strength | 220–350 MPa |
| Yield strength (0.2%) | 70–330 MPa |
| Hardness | 40–100 HV |
| Melting point | 1083 °C |
| Thermal conductivity | 391 W/m·K |
| Thermal expansion | 17.0 ×10⁻⁶/K |
| Electrical conductivity | 101% |
| Machinability (C36000 = 100%) | 20% |
| Grades we run | C10100 OFE, C10200 OF, C11000 ETP, C14500 tellurium copper |
Published typical values for C11000 ETP. Other grades in the family differ — the certificate supplied with your order carries the actual heat-lot figures.
It smears rather than cuts. Razor-sharp uncoated tooling and high rake; if the print allows it, C14500 tellurium copper machines four times better at ~90% IACS.
How CNC Bending Copper Works
The Copper 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.
We start from your supplied geometry and tolerance scheme. The setup is designed to minimise re-clamping, which protects positional accuracy across features. A first article is verified against the drawing before the balance of the batch is released.
Achievable Tolerances for CNC Bending Copper
| 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.
Working with Copper
Copper is excellent electrical and thermal conductivity. We translate those properties into a process plan: the right tooling, speeds, feeds and fixturing for the alloy.
Where the grade, temper or heat-treat condition matters to performance, we confirm it with you and can supply material certificates. Material is procured to recognised standards for consistent, repeatable results.
Design Tips for CNC Bending Copper
Small design adjustments often cut cost and lead time. Consistent bend radii, adequate flange lengths and grain-direction awareness reduce cracking and springback in formed Copper. If you send your model early, we will return practical DFM feedback before you commit to production.
CNC Bending Tolerances & Surface Finish
Formed Copper holds bend angles to about ±0.5° and consistent flange dimensions, with bend allowance compensated for the material and thickness.
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 Bending Copper
Copper parts made this way are found throughout aerospace, medical, automotive, electronics and industrial equipment. Prototype, bridge and production volumes are all welcome.
Typical Copper Parts for CNC Bending
Illustrative examples of CNC Bending Copper 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.
Radiused cover
- Material
- Copper
- Size
- R150 × 500 mm
- Key callouts
- Radius ±1 mm, no tool marks
- Batch
- 200 pcs
Bumped in 14 small steps rather than rolled, because the batch does not justify a roll set.
Mounting bracket
- Material
- Copper
- 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.
Sheet-metal enclosure
- Material
- Copper
- 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.
Finishing Options for Copper
| Finish | Thickness / effect | Why it gets specified |
|---|---|---|
| Tin plate | 3–15 µm | Solderable, prevents oxidation |
| Silver plate | 2–10 µm | Lowest contact resistance for RF and power |
| Nickel underplate | 2–5 µm | Diffusion barrier under tin or gold |
| Gold flash | 0.05–1 µm | Contact surfaces, over nickel |
| 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 Bending Copper
- 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 Copper 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 Bending
Other Processes for Copper
Send the drawing, the Copper grade and the quantity. You get pricing, lead time and any DFM notes back — usually within one business day.
Request a QuoteFrequently Asked Questions
Why is Copper a good choice for CNC Bending?
Copper is excellent electrical and thermal conductivity, which makes it well suited to CNC Bending. We tune the process to the alloy so the finished Copper forming part meets your dimensional and functional requirements.
Does CNC Bending Copper require dedicated tooling?
Most Copper forming work uses standard cutting tools and CNC programs; dedicated fixtures are made only when geometry or volume requires them.
How clean are the edges produced by CNC Bending on Copper?
Machined Copper edges are clean and to specification; edge-break or deburring is added when your drawing calls for it.
What is CNC Bending Copper and how is it done?
CNC Bending Copper refers to cNC bending forms sheet metal to precise angles using a programmed press brake and back-gauge. Applied to Copper — excellent electrical and thermal conductivity — VT machining produces each part to your CAD drawing, selecting parameters from your tolerance, finish and quantity requirements.