CNC Surface Grinding Phosphor Bronze is a core capability at VT machining. We combine controlled grinding with material-aware setup for Phosphor Bronze — an alloy that is springy, wear and corrosion resistant — to produce parts that meet your specification first time.
Process Data for CNC Surface Grinding Phosphor Bronze
| Wheel (supply condition) | Silicon carbide |
|---|---|
| Depth per pass (rough / finish) | 0.02-0.05 / 0.002-0.005 mm |
| Achievable finish | Ra 0.4-0.8 µm (soft metals load the wheel) |
| Typical size tolerance | Flatness 0.002-0.005 mm, thickness ±0.002 mm |
| Thermal growth, 200 mm part, +2 °C | 7.1 µm (CTE 17.8 µm/m·K) |
Shown for C510 Phosphor Bronze, the most common Phosphor Bronze grade we see for CNC Surface Grinding. Typical values for C510 Phosphor Bronze, Spring temper; confirmed on the first part.
CNC Surface Grinding Capability for Phosphor Bronze
- Flatness within 0.003 mm
- Ra to 0.1 µm
- Parallelism control
- Hardened-steel capable
Phosphor Bronze Material Data
| Density | 8.86 g/cm³ |
|---|---|
| Tensile strength | 325–965 MPa |
| Yield strength (0.2%) | 140–550 MPa |
| Hardness | 60–200 HV |
| Melting point | 975–1060 °C |
| Thermal conductivity | 69 W/m·K |
| Thermal expansion | 17.8 ×10⁻⁶/K |
| Electrical conductivity | 15% |
| Machinability (C36000 = 100%) | 20% |
| Grades we run | C51000, C51900, C52100, C54400 free-cutting |
Published typical values for C51000. Other grades in the family differ — the certificate supplied with your order carries the actual heat-lot figures.
Spring temper is destroyed by heat. Contacts and spring fingers are etched or wire-EDM cut, never laser cut.
How CNC Surface Grinding Phosphor Bronze Works
An abrasive wheel removes a fine, controlled layer from the Phosphor Bronze part. Wheel specification, dressing interval, infeed and coolant are matched to the alloy's hardness so the surface is not burned or left with residual stress.
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 Surface Grinding Phosphor Bronze
| Feature | Standard | Precision |
|---|---|---|
| Size (OD, ID, thickness) | ±0.005 mm | ±0.002 mm |
| Flatness over 100 mm | 0.010 mm | 0.003 mm |
| Parallelism | 0.010 mm | 0.003 mm |
| Roundness | 0.005 mm | 0.002 mm |
| Squareness | 0.010 mm | 0.005 mm |
| Surface finish | Ra 0.4 µm | Ra 0.1 µm |
| Workpiece hardness | up to 62 HRC | up to 65 HRC |
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 Surface Grinding Tolerances & Surface Finish
Ground Phosphor Bronze reaches single-micron tolerances on size, flatness and parallelism, with surface finishes down to Ra 0.1–0.4 µm — and a near-mirror finish on suitable alloys.
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.
Working with Phosphor Bronze
Phosphor Bronze offers a useful combination of properties: it is springy, wear and corrosion resistant. Those characteristics shape how we approach grinding — from tool and parameter selection to work-holding and coolant.
If your application is sensitive to alloy condition, we agree the specification in writing and document it. Stock is sourced from reputable suppliers so what you order is what you receive.
Design Tips for CNC Surface Grinding Phosphor Bronze
A few design choices make a real difference to cost and quality. Allowing adequate grind stock, specifying realistic flatness over the true datum, and relieving corners help us hit tight tolerances on Phosphor Bronze efficiently. If you send your model early, we will return practical DFM feedback before you commit to production.
Applications of CNC Surface Grinding Phosphor Bronze
CNC Surface Grinding 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 Surface Grinding
Illustrative examples of CNC Surface Grinding 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.
Gauge block set
- Material
- Phosphor Bronze
- Size
- 50 × 30 × 10 mm
- Key callouts
- Thickness ±0.002 mm, flatness 0.002 mm, parallelism 0.002 mm
- Batch
- 200 pcs
Ground wet in one chucking, then left to normalise before final inspection at 20 °C.
Slitter blade
- Material
- Phosphor Bronze
- Size
- Ø150 × 1.5 mm
- Key callouts
- Thickness ±0.005 mm, edge concentricity 0.005 mm
- Batch
- 400 pcs
Ground in a stack so all blades in a set share the same thickness.
Lapping plate
- Material
- Phosphor Bronze
- Size
- 300 × 300 × 30 mm
- Key callouts
- Flatness 0.005 mm over the full face
- Batch
- 20 pcs
Ground, stress-relieved, ground again — one pass will not hold flatness on this area.
Finishing Options for Phosphor Bronze
| 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 Surface Grinding 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 Surface Grinding
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 Surface Grinding Phosphor Bronze and how is it done?
CNC Surface Grinding Phosphor Bronze refers to surface grinding produces flat, parallel faces with fine finish using a horizontal abrasive wheel. 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.
How clean are the edges produced by CNC Surface Grinding on Phosphor Bronze?
Machined Phosphor Bronze edges are clean and to specification; edge-break or deburring is added when your drawing calls for it.
Does CNC Surface Grinding Phosphor Bronze require dedicated tooling?
Most Phosphor Bronze grinding 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 Phosphor Bronze with CNC Surface Grinding?
Grinding can take Phosphor Bronze to a fine finish — typically Ra 0.1–0.4 µm, and to a mirror grade on suitable alloys.
What tolerances can you hold for CNC Surface Grinding Phosphor Bronze?
Achievable tolerances for Phosphor Bronze grinding depend on the alloy, geometry and feature size. Grinding routinely holds single-micron tolerances on diameter, flatness and parallelism. Exact figures are confirmed against your drawing callouts.
Why is Phosphor Bronze a good choice for CNC Surface Grinding?
Phosphor Bronze is springy, wear and corrosion resistant, which makes it well suited to CNC Surface Grinding. We tune the process to the alloy so the finished Phosphor Bronze grinding part meets your dimensional and functional requirements.