CNC Machined Impellers
Impellers and rotors machined from solid, balanced and flow-tested where required.
Impellers machined from solid for low quantities, where a casting tool is not justified or the blade geometry is still changing. Blades are finished with a ball nose and polished where the flow needs it.
How we make it: Precision CNC machining service →
4–7 weeks
1 piece
ISO 9001:2015 · AS9100D
Technical Specifications
| Parameter | Value | Unit |
|---|---|---|
| Blade thickness down to | 0.8 | mm |
| Profile tolerance | ±0.05 | mm |
| Max diameter | Ø600 | mm |
| Surface roughness | Ra 0.8 | µm |
| Balancing | To G2.5 (on request) | - |
| Near-net option | Casting above volume | note |
Available Materials
- Aluminium 7075-T7351
- Stainless 316L
- Titanium 6Al-4V
- Bronze C932
- Inconel 718
Typical Applications
- Pump impellers
- Compressor rotors
- Fan and blower wheels
- Mixer heads
- Turbocharger prototypes
Surface Finishes
- As-machined
- Polished (flow surfaces)
- Bead blast
- Anodise
- Balanced
Industries Served
- Energy & Oil & Gas
- Chemical Processing
- Aerospace
- Water Treatment
- Marine
What drives the price of this part
Derived from the callouts on this page. Where a driver is not on the drawing, it is not on this list.
- Tolerance
- Profile tolerance at ±0.05 mm is the tightest callout this family carries. Tightening a callout is a process decision, not a machining decision: below the standard ±0.005 mm the work moves to grinding or jig boring, and the price moves with it.
- Part size
- Blade thickness down to at 0.8 mm decides which machine the part lands on and how many setups it needs. Size is the driver buyers most often leave out of a first enquiry, and it is the one that changes the quote fastest.
- Surface finish
- Surface roughness at Ra 0.8 µm. Every step below the ordinary as-machined Ra 1.6 µm adds a finishing pass; a callout on a face nobody touches is the most common over-specification we quote.
- Material
- The first material listed, Stainless Steel 316L, rates 3/10 on our machinability scale at 217 HB. On this shop's scale a harder alloy means slower passes and more tool changes, and that is cycle time the quote has to carry.
- Order size
- Minimum order is 1 piece, so on a first order setup and programming are spread over very few parts and they are most of the price. Repeat orders at the same quantity are cheaper without anything on the drawing changing.
See how cycle time is calculated in the machining time calculator and what else moves a price in the cost driver reference.
How these parts are inspected
Matched to the callouts above and the instruments actually on the floor.
- Coordinate measuring machine (Zeiss CONTURA G2, two machines, GR&R 8.4% on the critical feature)
- Dimensional report against the drawing, with a 100% check on critical features rather than a sample
- Certificate of conformance and the mill certificate with every shipment
- Surface roughness tester (Mitutoyo) against the Ra callout
- First article inspection to AS9102, because this family carries an aerospace or automotive certificate
The full equipment list, with counts, is on the capability page; the inspection sequence is on quality and inspection.
Questions buyers ask
- Machined or cast impeller?
- Machined for prototypes and low volume, because there is no tool and the geometry can still change. Casting wins once the design is frozen and the quantity spreads the tool.
Related part families
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