7075 Aluminum Billet 5-Axis CNC Machined Centrifuge Rotor Dynamic Balanced
7075 Aluminum Centrifuge Rotor
,Dynamically Balanced Rotor
,Custom High-Speed Rotor Machining
This 7075 aluminum centrifuge rotor is a high-performance rotating precision component for high-speed centrifugal separation equipment. Machined from a solid 7075-T6 aluminum billet instead of being cast or welded, it holds a denser, pore-free structure that gives a superior strength-to-weight ratio, high rigidity and consistent dynamic balance at speed.
Each rotor is produced with 3-axis and 5-axis simultaneous CNC machining in a single clamping, keeping the sample-tube bores, central shaft bore and lightening pockets true to a single rotation axis. Critical features are held to ±0.01mm, and every rotor is CMM-inspected and dynamically balanced before shipment.
- Certified 7075-T6 aluminum billet selection with material certificate and traceability.
- 3D drawing decomposition and process planning by our engineering team.
- 3-axis roughing of the disc body and inner cavities to control distortion.
- 5-axis simultaneous finishing of the sample-tube bore array, shaft bore and lightening pockets in one clamping.
- Deburr, ultrasonic clean, then anodizing (clear, black or hard) for protection.
- CMM full-dimension inspection, then dynamic balance testing to the agreed balance grade.
- Protective packing and photo confirmation before shipment.
Dimensional tolerance: ±0.01mm | Dynamic balance: G2.5 (ISO 1940) | Shaft bore concentricity: ≤0.01mm | Radial runout: ≤0.02mm
A centrifuge rotor lives or dies by balance. After machining, each rotor is spun on a balancing machine and material is precisely removed at the lightening pockets until residual unbalance meets G2.5 (tighter grades available on request), eliminating the vibration that shortens bearing life and creates safety risk at high speed. The shaft bore and outer profile are machined concentric to ≤0.01mm with radial runout ≤0.02mm, and weight is controlled within ±2% for predictable spin-up behavior.
7075-T6 aluminum is chosen for its high strength-to-weight ratio, excellent rigidity and fatigue resistance under repeated high-speed cycles, with no casting porosity or weld seams to initiate cracks. 6061 and 2024 are available for lighter-duty rotors. Hard anodizing improves wear and corrosion resistance around bore edges and mounting faces where samples load and unload.
Custom rotors are our core business. Send STEP, IGES, STP or DWG files with your tube count, bore size, speed rating and balance grade, and our engineering team returns a DFM review within 24-48 hours. From one prototype to series production, we control the full route in-house.
- Custom tube count, bore diameter, angle and depth
- Custom speed rating and dynamic balance grade (G2.5 / G6.3 / tighter)
- Custom central shaft bore and mounting interface
- Custom material: 7075-T6, 6061, 2024 aluminum and titanium
- Custom finish: clear / black / hard anodize, laser marking; low MOQ from 1 piece
Dongguan Changxinda Precision Technology Co., Ltd. (brand: China-CXD) has specialised in custom CNC precision parts and metal manufacturing since 2008. Our 90+ staff operate 4-axis and 5-axis CNC machining centers, turn-mill combined CNC lathes, CNC lathes and milling machines under an ISO 9001:2015 quality management system.
- Founded in 2008, 15+ years of precision machining know-how
- Industries served: medical and laboratory equipment, robotics, automation, semiconductor, new energy automotive, aerospace and instruments
- 200+ customers served, 50-60% of output exported worldwide
- ISO 9001:2015 certified with full material traceability
- Slogan: CNC Machining Experts, Serving Global Industries
| Prototype / sample | 10-15 working days |
|---|---|
| Small batch (10-50 pcs) | 15-22 working days |
| Mass production (50-500 pcs) | 20-30 working days |
| Monthly supply ability | 5,000 pcs / month |
| Shipping | DHL / FedEx / UPS express, air freight, sea freight |
Because every rotor passes dynamic balancing, we reserve dedicated balancing slots in the schedule to keep lead times predictable. Shock-proof export cartons with individual cradles protect the balanced rotor, and custom branding or labelling is available on request.
- High-speed laboratory and medical centrifuges
- Blood bank and clinical sample processing rotors
- Industrial centrifugal separation equipment
- Cell and molecular biology research centrifuges
- Pharmaceutical and biotech sample preparation
- ±0.01mm dimensional tolerance on critical features
- 3-axis + 5-axis simultaneous machining, single setup
- Dynamically balanced to G2.5 (ISO 1940)
- Shaft bore concentricity ≤0.01mm, runout ≤0.02mm
- Solid 7075-T6 billet, pore-free and crack-safe
- Weight controlled within ±2% for stable spin-up
- CMM inspection + dynamic balance test before shipment
- Hard anodize for wear and corrosion resistance
- Full OEM / ODM customization, balance grade on request
- Low MOQ from 1 piece, stable and predictable delivery
A: Yes. Send your STEP, IGES, STP or DWG drawing with tube count, bore size and speed rating; we return a DFM review within 24-48 hours.
A: G2.5 per ISO 1940 is standard, with tighter grades available on request. Every rotor is spin-balanced and adjusted at the lightening pockets before shipment.
A: Billet 7075-T6 has no casting porosity or weld seams, giving higher strength, better fatigue life and more consistent dynamic balance at high speed.
A: We accept orders from 1 piece for prototypes and scale to hundreds per month for series production.
A: Dedicated balancing slots, multi-machine capacity of 5,000 pcs per month and in-process CMM checks keep lead times predictable: samples 10-15 days, small batch 15-22 days, mass production 20-30 days.
A: Yes. Every shipment includes a CMM dimension report and dynamic balance test record as part of our ISO 9001:2015 system.
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