VT machining provides CNC Swiss Machining Phosphor Bronze for customers who need accurate, repeatable Phosphor Bronze components. Because Phosphor Bronze is springy, wear and corrosion resistant, we adapt the process to suit — controlling the variables that matter for this alloy.
Starting Parameters for CNC Swiss Machining Phosphor Bronze
| Cutting speed (carbide) | 110-180 m/min |
|---|---|
| Feed | 0.08-0.25 mm/rev |
| Spindle speed, Ø8 mm bar | 4380-7160 rpm |
| Insert / tool class | ISO N — sharp, polished, uncoated or DLC |
| Coolant | Emulsion |
| Length-to-diameter capability | up to ~10:1 (slower feeds for this grade) |
Shown for C510 Phosphor Bronze, the most common Phosphor Bronze grade we see for CNC Swiss Machining. Starting values for C510 Phosphor Bronze, Spring temper; optimised on the first article.
CNC Swiss Machining Capability for Phosphor Bronze
- Ø1–32 mm bar
- Slenderness without deflection
- Tolerance to ±0.003 mm
- High-volume small parts
Phosphor Bronze material properties, finishing options and grade notes are on our CNC Turning Phosphor Bronze page.
How CNC Swiss Machining Phosphor Bronze Works
The Phosphor Bronze bar or billet rotates in the spindle while single-point tools shape outer diameters, bores, faces, grooves and threads. Constant surface speed control keeps cutting conditions stable from large to small diameters.
Every job begins from your CAD model or 2D drawing. Fixturing and tool paths are planned so the most critical dimensions are produced in the most rigid, repeatable setup. Critical dimensions are checked on the first part and monitored through the run.
Achievable Tolerances for CNC Swiss Machining Phosphor Bronze
| 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.
CNC Swiss Machining Tolerances & Surface Finish
Turned Phosphor Bronze 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.
Design Tips for CNC Swiss Machining Phosphor Bronze
A few design choices make a real difference to cost and quality. Consistent diameters, standard thread forms and avoiding extremely long, slender features help Phosphor Bronze turned parts stay concentric and economical. If you send your model early, we will return practical DFM feedback before you commit to production.
Applications of CNC Swiss Machining Phosphor Bronze
CNC Swiss Machining of Phosphor Bronze 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.
Typical Phosphor Bronze Parts for CNC Swiss Machining
Illustrative examples of CNC Swiss Machining Phosphor Bronze 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.
Bearing spacer
- Material
- Phosphor Bronze
- Size
- Ø35 / Ø22 × 9 mm
- Key callouts
- Thickness ±0.005 mm, parallelism 0.005 mm
- Batch
- 4,000 pcs
Turned then double-disc ground — thickness this tight is not a lathe job.
Nozzle body
- Material
- Phosphor Bronze
- Size
- Ø12 × 46 mm
- Key callouts
- Ø0.6 mm orifice ±0.01 mm, internal taper 20°
- Batch
- 600 pcs
Orifice EDM-drilled after turning; a drill wanders at that diameter.
Threaded fitting
- Material
- Phosphor Bronze
- Size
- Ø22 hex × 38 mm
- Key callouts
- G3/8" thread class 4h, bore H8, sealing face Ra 0.8 µm
- Batch
- 2,500 pcs
Run on a sub-spindle lathe so the back face is finished without a second setup.
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 Phosphor Bronze
- 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 Phosphor Bronze 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 Swiss Machining
Other Processes for Phosphor Bronze
Send the drawing, the Phosphor Bronze 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 is CNC Swiss Machining Phosphor Bronze and how is it done?
CNC Swiss Machining Phosphor Bronze refers to swiss-type machining guides bar stock through a sliding headstock for high-accuracy small, slender parts. Applied to Phosphor Bronze — springy, wear and corrosion resistant — VT machining produces each part to your CAD drawing, selecting parameters from your tolerance, finish and quantity requirements.
What is the typical lead time and minimum order for CNC Swiss Machining Phosphor Bronze?
CNC Swiss Machining prototypes for Phosphor Bronze can be produced quickly and scaled to series production. Send your drawing and quantity and we will advise lead time and any minimum order.
Does CNC Swiss Machining Phosphor Bronze require dedicated tooling?
Most Phosphor Bronze turning work uses standard cutting tools and CNC programs; dedicated fixtures are made only when geometry or volume requires them.
What material thickness or size range suits CNC Swiss Machining Phosphor Bronze?
Turned Phosphor Bronze parts are produced from bar or chuck stock across a wide diameter range.
Why is Phosphor Bronze a good choice for CNC Swiss Machining?
Phosphor Bronze is springy, wear and corrosion resistant, which makes it well suited to CNC Swiss Machining. We tune the process to the alloy so the finished Phosphor Bronze turning part meets your dimensional and functional requirements.
Can VT machining make custom Phosphor Bronze parts to my drawing?
Yes. Phosphor Bronze turning 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.