CNC Gear Grinding Phosphor Bronze is a core capability at VT machining. We combine controlled gear cutting 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.
CNC Gear Grinding Capability for Phosphor Bronze
- DIN/AGMA accuracy class
- Profile & lead correction
- Hardened-gear finishing
- Low transmission noise
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 Gear Grinding Phosphor Bronze Works
Tooth profiles are generated in the Phosphor Bronze blank by a synchronised cutter, then refined to the required accuracy class. Module, pressure angle and helix are programmed from your gear data.
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 Gear Grinding Phosphor Bronze
| Feature | Standard | Precision |
|---|---|---|
| Accuracy class | DIN 8 / AGMA 10 | DIN 6 / AGMA 12 |
| Profile deviation | 0.020 mm | 0.008 mm |
| Lead deviation | 0.020 mm | 0.008 mm |
| Pitch deviation (cumulative) | 0.040 mm | 0.015 mm |
| Runout | 0.030 mm | 0.010 mm |
| Tooth surface finish | Ra 1.6 µm | Ra 0.4 µm (ground) |
| Module range | m0.5–m8 | m1–m6 |
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 Gear Grinding Phosphor Bronze
Small design adjustments often cut cost and lead time. Providing complete gear data (module, pressure angle, profile shift, quality class) lets us produce Phosphor Bronze gears right the first time. If you send your model early, we will return practical DFM feedback before you commit to production.
CNC Gear Grinding Quality & Inspection
Quality is built in, not inspected on. We monitor key features during the run and confirm them at final inspection, with CMM verification available for tight tolerances. We provide the inspection and traceability records your quality system requires.
CNC Gear Grinding Tolerances & Surface Finish
Gear features are produced to a specified DIN/AGMA accuracy class, with profile and lead controlled for quiet, durable running under load.
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.
Secondary Operations & Finishing
Most Phosphor Bronze parts need some finishing, which we manage in-house or through vetted partners. Options include deburring and edge-breaking, heat treatment, surface grinding, polishing, and plating or anodising for corrosion resistance and appearance. Give us the finished-part requirement and we will sequence every operation correctly.
Working with Phosphor Bronze
Phosphor Bronze is springy, wear and corrosion resistant. 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.
Applications of CNC Gear Grinding Phosphor Bronze
Phosphor Bronze parts made this way are found throughout aerospace, medical, automotive, electronics and industrial equipment. Prototype, bridge and production volumes are all welcome.
How to Order CNC Gear Grinding Phosphor Bronze
Starting your project takes one email. Send your CAD or 2D drawing, the Phosphor Bronze grade and condition, the quantity and any finish or inspection requirements. We respond quickly with price, lead time and any DFM notes, in clear English.
Parts We Have Run in Phosphor Bronze
Three representative CNC Gear Grinding Phosphor Bronze jobs, with the callouts that actually drove the process plan. Yours will differ — these are here so you can judge whether your part is in our range before you spend time on an RFQ.
Worm and wheel set
- Material
- Phosphor Bronze
- Size
- m3, single start
- Key callouts
- Backlash 0.05–0.10 mm as a matched pair
- Batch
- 120 sets
Supplied as matched sets and marked, because mixing pairs loses the backlash spec.
Internal ring gear
- Material
- Phosphor Bronze
- Size
- m2.5, z72, ID 190 mm
- Key callouts
- DIN 8, pitch deviation 0.03 mm
- Batch
- 150 pcs
Shaped rather than hobbed — an internal gear leaves no room for a hob to run out.
Spur gear
- Material
- Phosphor Bronze
- Size
- m2, z40, 20° PA, face 20 mm
- Key callouts
- DIN 7, runout 0.02 mm
- Batch
- 500 pcs
Hobbed, hardened, then hard-finished; skipping the finish pass costs a full accuracy class.
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 Gear 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 Gear 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 the typical lead time and minimum order for CNC Gear Grinding Phosphor Bronze?
CNC Gear Grinding 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.
What tolerances can you hold for CNC Gear Grinding Phosphor Bronze?
Achievable tolerances for Phosphor Bronze gear cutting 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.
Does CNC Gear Grinding Phosphor Bronze require dedicated tooling?
Most Phosphor Bronze gear cutting work uses standard cutting tools and CNC programs; dedicated fixtures are made only when geometry or volume requires them.
Why is Phosphor Bronze a good choice for CNC Gear Grinding?
Phosphor Bronze is springy, wear and corrosion resistant, which makes it well suited to CNC Gear Grinding. We tune the process to the alloy so the finished Phosphor Bronze gear cutting part meets your dimensional and functional requirements.