VT machining provides CNC Centerless Grinding Aluminum for customers who need accurate, repeatable Aluminum components. Because Aluminum is lightweight, excellent machinability, good corrosion resistance, we adapt the process to suit — controlling the variables that matter for this alloy.
Process Data for CNC Centerless Grinding Aluminum
| Wheel (supply condition) | Silicon carbide, open structure |
|---|---|
| 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 | Ø ±0.002 mm, roundness 0.001-0.002 mm |
| Through-feed rate | 1-3 m/min |
| Diameter range | Ø1-60 mm |
Shown for 6061 Aluminum, the most common Aluminum grade we see for CNC Centerless Grinding. Typical values for 6061 Aluminum, T6 / T651; confirmed on the first part.
CNC Centerless Grinding Capability for Aluminum
- No center holes needed
- High throughput
- Diameter ±0.003 mm
- Through-feed & in-feed
Aluminum material properties, finishing options and grade notes are on our CNC Surface Grinding Aluminum page.
How CNC Centerless Grinding Aluminum Works
An abrasive wheel removes a fine, controlled layer from the Aluminum 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.
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 Centerless Grinding Aluminum
| 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 Centerless Grinding Aluminum
Small design adjustments often cut cost and lead time. Allowing adequate grind stock, specifying realistic flatness over the true datum, and relieving corners help us hit tight tolerances on Aluminum efficiently. If you send your model early, we will return practical DFM feedback before you commit to production.
CNC Centerless Grinding Tolerances & Surface Finish
Ground Aluminum 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.
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 Centerless Grinding Aluminum
Aluminum parts made this way are found throughout aerospace, medical, automotive, electronics and industrial equipment. Prototype, bridge and production volumes are all welcome.
Typical Aluminum Parts for CNC Centerless Grinding
Illustrative examples of CNC Centerless Grinding Aluminum 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.
Mould insert
- Material
- Aluminum
- 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.
Ceramic-coated shaft journal
- Material
- Aluminum
- 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.
Lapping plate
- Material
- Aluminum
- 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.
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 Centerless Grinding Aluminum
- 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 Aluminum 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 Centerless Grinding
Other Processes for Aluminum
Send the drawing, the Aluminum grade and the quantity. You get pricing, lead time and any DFM notes back — usually within one business day.
Request a QuoteFrequently Asked Questions
Can VT machining make custom Aluminum parts to my drawing?
Yes. Aluminum grinding 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.
Why is Aluminum a good choice for CNC Centerless Grinding?
Aluminum is lightweight, excellent machinability, good corrosion resistance, which makes it well suited to CNC Centerless Grinding. We tune the process to the alloy so the finished Aluminum grinding part meets your dimensional and functional requirements.
How clean are the edges produced by CNC Centerless Grinding on Aluminum?
Machined Aluminum edges are clean and to specification; edge-break or deburring is added when your drawing calls for it.
What is CNC Centerless Grinding Aluminum and how is it done?
CNC Centerless Grinding Aluminum refers to centerless grinding supports the workpiece on a blade between wheels for high-throughput OD finishing. Applied to Aluminum — lightweight, excellent machinability, good corrosion resistance — VT machining produces each part to your CAD drawing, selecting parameters from your tolerance, finish and quantity requirements.