Product Category
Blade ±0.05 · TE R0.3 · Ra 0.8µm · 5-Axis CNC · MOQ 1
OIP / 001 — 010
5-Axis CNC Machined
Open Impellers
Custom 5-axis CNC machined open impellers with exposed blade geometry — thin swept blades, variable pitch, blade profile ±0.05 mm, trailing edge down to R0.3 mm, flow surfaces Ra 0.8 µm. Blade-to-blade profile deviation ≤ 0.02 mm verified by CMM or optical scan. Fast prototype to production for pumps, mixers, and industrial fluid equipment.
±0.05mm
Blade Profile
R0.3mm
Min TE Radius
Ra 0.8µm
Flow Surface
PART DWG · OIP-001 · 6 BLADES · Al 7075 · 5-AXIS ONE SETUP
ISO 9001 · CMM PROFILE SCAN · BAL ≤ 0.02
5-Axis Simultaneous
Blade-to-Blade ≤0.02
Mixer · Pump · Marine · HVAC · Chem · Aero
Applications
Al 7075 · SUS316L · Ti · PEEK · Bronze
Materials
48hr Quote · 6-Day Proto · MOQ 1
Service
±0.05mm
Blade Profile
5-axis tolerance
5-axis tolerance
R0.3mm
Min Trailing Edge
thin-blade capability
thin-blade capability
Ra 0.8µm
Flow Surface
all blade surfaces
all blade surfaces
6 Days
Fastest Delivery
prototype orders
prototype orders
Why It's Difficult
Open Impeller Machining Challenges
Open impellers have exposed blades that are thin, tall, and prone to vibration during machining — yet must hold tight profile tolerances for consistent hydraulic performance.
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Thin Blade Stability
Thin, tall blades (aspect ratio >5:1) vibrate at tool contact — causing chatter marks and profile inaccuracy. We machine open impeller blades with adaptive feed rate, optimised lead/lag angles, and where needed, custom damping fixtures.
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Trailing Edge Sharpness
The trailing edge must taper to a radius as small as R0.3 mm — difficult to achieve without breakout or burring. We use dedicated trailing-edge finishing passes with small ball-nose tools and controlled approach angles.
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Blade-to-Blade Uniformity
Every blade must match every other for balanced operation. HXC measures all blades by CMM or optical scan and reports blade-to-blade profile deviation — standard ≤ 0.02 mm.
Our Work
Request Similar Part →
Open Impellers We've Made
Open pump, mixer, and industrial fluid impellers — exposed blades, Ra 0.8 µm, fully CMM verified.
Al 7075 · MixerIndustrial Mixer Open Impeller
6 blades · Ra 0.8µm · 40 pcs
SUS316L · SlurrySlurry Pump Open Impeller
Hardened · 20 pcs
Al 6061 · HVACOpen Axial Fan Impeller
8 blades · Ano · 60 pcs
Ti Grade 5 · AeroAerospace Open Impeller
±0.03mm · 5 pcs
SUS304 · WaterWastewater Open Impeller
Non-clog · 25 pcs
Bronze · MarineMarine Open Impeller
3-blade · Bronze · 15 pcs
PEEK · ChemicalPEEK Open Impeller
Chemical-res. · 10 pcs
Al 7075 · ProtoR&D Prototype Impeller
Fast-turn · 3 pcs
Capabilities & Tolerances
What We Can Deliver
Typical specifications for this product type — confirm exact requirements at enquiry.
| Blade count | 2–16 blades |
| Max OD | Ø600 mm |
| Min blade thickness | 1.5 mm |
| Blade profile tol. | ±0.05 mm |
| Trailing edge radius | R0.3 mm min |
| Blade-to-blade deviation | ≤ 0.02 mm |
| Surface finish (blade) | Ra 0.8 µm standard |
| Materials | Al, SS, Ti, Bronze, PEEK |
| Machining | 5-axis simultaneous |
| Inspection | CMM + blade profile scan |
| Lead time (proto) | 6–9 days |
| Lead time (batch) | 12–18 days |
How It Works
From Drawing to Finished Part
Upload your 2D/3D file — DFM feedback, toolpath planning, and confirmed lead time within 48 hours.
01
Upload Drawing
STEP, IGES, DXF or PDF. Include surface quality and tolerance callouts.
02
DFM & Toolpath
Free DFM review — undercuts, thin walls, flow path access, surface strategy.
03
5-Axis & QC
5-axis CNC, in-process probing, CMM or optical surface scan.
04
Ship Worldwide
Full dimensional report enclosed. DHL / FedEx / sea freight.
Reviews
Trusted by Engineers Worldwide
★★★★★
"Blade profile accuracy was exceptional — every part passed our incoming CMM check first time. Surface finish on the flow surfaces exceeded our Ra 0.4 µm specification."
AK
Alex K.
Fluid Systems Engineer · Germany
★★★★★
"HXC understood the 5-axis toolpath challenges immediately. Their DFM feedback caught an undercut issue we had missed. Lead time as quoted."
SL
Sophie L.
Design Engineer · France
★★★★★
"We've run three production batches of complex curved parts through HXC. Dimensional consistency batch-to-batch is the best we've seen from any supplier."
JT
James T.
Senior Procurement Manager · UK
FAQ
Open Impeller Machining — FAQ
Engineering and procurement questions answered by our 5-axis machining team.
Yes — open impellers are well-suited to fast prototype iteration. With no enclosed passages, toolpath programming is faster and first-article inspection is simpler than for closed impellers. HXC regularly turns around single-piece prototype open impellers in 6–9 days — fast enough for design iteration cycles in development programmes.
Yes, with appropriate process controls. For blades thinner than 3 mm, HXC uses: (1) Adaptive feed control — reduces feed at high-deflection zones; (2) Lead/lag angle optimisation — cutting forces are directed along the blade rather than across it; (3) Sequential blade roughing — adjacent blades provide mutual stiffness during roughing. Minimum blade thickness: 1.5 mm in aluminium, 2.0 mm in stainless.
Blade profile: ±0.05 mm standard (CMM verified). Blade chord length: ±0.1 mm. Trailing edge position: ±0.05 mm. Blade-to-blade variation: ≤ 0.02 mm. Hub-to-blade fillet radius: ±0.1 mm. For tighter requirements (aerospace prototypes), ±0.02 mm profile tolerance is achievable with additional semi-finish probing and correction passes.
SUS316L: for acidic and corrosive fluids. Duplex stainless (2205): for high-chloride (seawater, brine). PEEK: for strong acids and solvents. Bronze C95500: for marine and seawater where corrosion and biofouling resistance are critical. HXC stocks and certifies all these materials with mill certificates.
Yes — aluminium open impellers are regularly Type II or Type III hard anodized after machining. For flow surfaces where Ra is critical, dimensional pre-compensation is applied (anodize grows the surface by 15–25 µm). For high-efficiency hydraulic applications, the flow surfaces may be left un-anodized and only the hub and external surfaces treated.
HXC machines open impellers with 2–16 blades depending on diameter. For very low blade count (2–3 blades), dynamic imbalance increases — we recommend balance correction features be included in the design. Odd blade counts (3, 5, 7) are preferred for hydraulic efficiency in centrifugal pump applications.
Yes — HXC can reverse-engineer an open impeller from a physical sample using our optical 3D scanner. The scanned point cloud is converted to a parametric STEP model, which we then optimise for machinability and quote. This service is commonly used for obsolete pump impeller replacement.
Prototype (1–3 pcs, new programme): 6–9 days. Small batch (10–50 pcs): 10–16 days. Production (100+ pcs): 14–20 days. PEEK and superalloy open impellers add 3–5 days.
Get a Quote
Send Your Drawing.
Get a Quote.
Every enquiry includes a DFM review — tolerance feasibility, material confirmation, and process approach confirmed before production starts. MOQ 1 piece.
24hr
Quote Response
MOQ 1
Prototypes OK
ISO
9001:2015
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DFM Review on Every Enquiry
Tolerance feasibility, fixturing strategy, and material confirmation. Specific, actionable feedback — not generic pushback.
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First Article Inspection — Standard
FAI report on every new run. Material certs and surface treatment certs included with every shipment.
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Same Process: Prototype to Production
Process plan from your prototype applies to production batches. No re-qualification when you scale.
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3 / 4 / 5-Axis CNC + Turning
Complex structural parts, shafts, housings, and transmission components. Metals and engineering plastics.
ISO 9001:2015
3/4/5-Axis Milling
CNC Turning
CMM Inspection
Global Delivery