5-Axis CNC Machined Stainless Steel Impeller

This is a custom impeller, inducer or blower wheel machined on simultaneous 5-axis CNC equipment from 304/316 stainless steel or 6061/7075 aluminum. Twisted blade surfaces, hub bores and keyways are cut from solid, with critical bore features held down to ±0.01 mm. It suits pump, compressor, fan and marine-propulsion engineers developing or replacing rotating flow parts.

Material: Stainless Steel
Tolerance: to ±0.005 mm
MOQ: 1 piece
Prototype lead time: 3–7 days

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Simultaneous 5-axis for freeform twisted blades
Hub bore cut first as rotating datum
316 stainless or 6061/7075 aluminum
CMM blade-profile check against CAD

ISO 9001 quality system, 100% critical-dimension inspection

NDA on request; your drawings are never shared

Door-to-door shipping with export documents

Item ref. 62549743668 ·

Specifications
Process	Simultaneous 5-axis CNC milling, CNC turning
Materials	Stainless steel 304/316; aluminum 6061/7075
Tolerance	±0.05 mm standard; down to ±0.01 mm on bores
Surface Finish	Passivation, polishing, hard anodizing
MOQ	1 piece
Drawing Formats	STEP, IGES, X_T, STL, DWG, DXF, PDF
Lead Time	Typically 3–15 working days depending on size and quantity
Inspection	First-article + 100% critical-dimension inspection; CMM report on request
Options	Dynamic balancing to specified grade on request

Manufacturing

How we make this part

Process, material options and inspection for 5-axis cnc machined stainless steel impeller.

Impeller blades are freeform surfaces that need the tool axis to tilt continuously, which is why simultaneous 5-axis machining is required. We rough between blades with ball or barrel tools, then finish the blade surfaces and fillets with smooth, collision-checked toolpaths. The hub bore and keyway are turned and broached first so all blade machining references the rotating axis. Thin trailing edges are finished last.

316 stainless resists seawater and chemicals, making it the common choice for pump and marine impellers, but its toughness means longer cycle times. 304 is suitable for water and mild media. Aluminum 7075 or 6061 keeps inertia low for air blowers and test prototypes. Finishes include passivation and polishing for stainless, which reduces surface friction, and hard anodizing for aluminum wear resistance.

Blade profiles are checked on CMM against the CAD model, along with bore size, runout and blade thickness. Dynamic balancing can be arranged to your grade. Critical dimensions are 100% inspected before shipment. Typical uses include centrifugal pump impellers, turbocharger compressor prototypes, blower wheels, water-jet inducers, marine pump rotors and process mixer rotors.

FAQ

Frequently asked questions

Why does an impeller need 5-axis machining?

Impeller blades are twisted and overlap, so a 3-axis cutter cannot reach between them without collisions. Simultaneous 5-axis motion tilts the tool to follow each blade surface and fillet in one setup, which produces accurate, smooth blades without welding or casting.

Can you balance machined impellers?

Yes. Dynamic balancing can be arranged to the balance grade on your drawing, such as G6.3 or G2.5. Material is removed at designated balance locations. Specify the grade and allowable correction areas so balancing does not affect blade performance.

How do I get a quote for 5-axis cnc machined stainless steel impeller?

Send a 3D model (STEP or IGES) and a 2D drawing with tolerances, material, finish and quantity through the quote form or by email. An engineer replies within 24 hours on business days with price, lead time and any DFM suggestions.