CNC Thread Grinding Stainless Steel from VT machining delivers precision Stainless Steel parts produced to your exact drawing. Thread grinding produces precise, high-finish threads on hardened parts and lead screws, and we tune every parameter to the behaviour of Stainless Steel, which is corrosion resistant, strong, hygienic (304/316 grades).
CNC Thread Grinding Capability for Stainless Steel
- Pitch accuracy to grade 3
- Hardened-part threading
- Lead screws & gauges
- Fine surface finish
Stainless Steel Material Data
| Density | 8.00 g/cm³ |
|---|---|
| Tensile strength | 515 MPa |
| Yield strength (0.2%) | 205 MPa |
| Hardness | 170 HB |
| Melting point | 1400–1450 °C |
| Thermal conductivity | 16.2 W/m·K |
| Thermal expansion | 17.3 ×10⁻⁶/K |
| Electrical conductivity | 2.4% |
| Machinability (C36000 = 100%) | 45% |
| Grades we run | 303, 304/304L, 316/316L, 321, 410, 416, 420, 17-4PH, 2205 duplex |
Published typical values for 304. Other grades in the family differ — the certificate supplied with your order carries the actual heat-lot figures.
It work-hardens the moment a tool dwells. Constant feed and positive-rake tooling; a rubbing pass leaves a glazed skin the next tool cannot get through.
How CNC Thread Grinding Stainless Steel Works
An abrasive wheel removes a fine, controlled layer from the Stainless Steel 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.
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 Thread Grinding Stainless Steel
| 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.
Design Tips for CNC Thread Grinding Stainless Steel
We are happy to suggest design tweaks that improve manufacturability. Allowing adequate grind stock, specifying realistic flatness over the true datum, and relieving corners help us hit tight tolerances on Stainless Steel efficiently. If you send your model early, we will return practical DFM feedback before you commit to production.
CNC Thread Grinding Quality & Inspection
We control quality throughout the process, not just at the end. In-process checks plus final inspection — including CMM where specified — keep every Stainless Steel part to print. Inspection reports, material certificates and first-article documentation can be supplied on request.
CNC Thread Grinding Tolerances & Surface Finish
Ground Stainless Steel 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.
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.
Secondary Operations & Finishing
Finished Stainless Steel parts can move straight into secondary operations under one roof. Typical add-ons are deburring, passivation, anodising, plating, blasting, polishing and laser marking. We coordinate the whole chain so you receive complete, inspection-ready parts.
Working with Stainless Steel
As a material, Stainless Steel is corrosion resistant, strong, hygienic (304/316 grades). Our setup reflects the alloy's machinability so the finished part is accurate and free of avoidable defects.
We verify the exact grade and condition before machining, and traceable mill certs are available on request. We can work to your nominated material source or specification when required.
Applications of CNC Thread Grinding Stainless Steel
Customers order CNC Thread Grinding Stainless 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.
How to Order CNC Thread Grinding Stainless Steel
Getting a quote is simple. Share your model, the material grade, your quantity and target tolerances. You receive a clear quotation with lead time and honest manufacturability feedback.
Parts We Have Run in Stainless Steel
Three representative CNC Thread Grinding Stainless Steel 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.
Ceramic-coated shaft journal
- Material
- Stainless Steel
- Size
- Ø45 × 180 mm
- Key callouts
- OD ±0.003 mm, roundness 0.002 mm, Ra 0.2 µm
- Batch
- 150 pcs
Ground after coating; the coating is never the final dimension.
Mould insert
- Material
- Stainless Steel
- Size
- 80 × 60 × 25 mm
- Key callouts
- Flatness 0.003 mm, squareness 0.005 mm
- Batch
- 90 pcs
Surface ground on all six faces so the insert seats without shimming.
Gauge block set
- Material
- Stainless Steel
- 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.
Finishing Options for Stainless Steel
| Finish | Thickness / effect | Why it gets specified |
|---|---|---|
| Citric passivation | — | ASTM A967 / AMS 2700, removes free iron |
| Electropolish | 5–25 µm removed | Ra improves by roughly half, hygienic surface |
| Brushed / grained | Ra 0.4–1.6 µm | No. 4 finish, directional |
| PVD coating | 2–5 µm | TiN, TiCN for wear surfaces |
| 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 Thread Grinding Stainless 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 Stainless 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 Thread Grinding
Other Processes for Stainless Steel
Send the drawing, the Stainless 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 tolerances can you hold for CNC Thread Grinding Stainless Steel?
Achievable tolerances for Stainless Steel 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.
What is CNC Thread Grinding Stainless Steel and how is it done?
CNC Thread Grinding Stainless Steel refers to thread grinding produces precise, high-finish threads on hardened parts and lead screws. Applied to Stainless Steel — corrosion resistant, strong, hygienic (304/316 grades) — 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 Thread Grinding on Stainless Steel?
Machined Stainless Steel edges are clean and to specification; edge-break or deburring is added when your drawing calls for it.
What is the typical lead time and minimum order for CNC Thread Grinding Stainless Steel?
CNC Thread Grinding prototypes for Stainless Steel 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 Thread Grinding Stainless Steel require dedicated tooling?
Most Stainless Steel grinding work uses standard cutting tools and CNC programs; dedicated fixtures are made only when geometry or volume requires them.