Qingdao Sande Technology Co., LTD
We have *professional and experienced engineer team *Advanced production and inspection equipment*Powerful quality control system *Professional customer service Based on our professional service,high
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Precision Casting CNC Machining: Fan Counterweight Blocks, Fan Brackets & Custom Casting Services
We specialize in high-quality precision casting and CNC machining for industrial components, including :
Fan Counterweight Blocks – Precisely engineered for optimal balance, durability, and performance in fan systems.
Fan Brackets – Robust and lightweight support structures designed for stability and long-term reliability.
Custom Casting Solutions – Tailored to meet specific design requirements, ensuring superior strength, corrosion resistance, and dimensional accuracy.
Our advanced investment casting (lost-wax casting) and CNC machining processes guarantee tight tolerances, smooth finishes, and consistent quality for both standard and custom parts. Ideal for HVAC, industrial machinery, automotive, and aerospace applications.
Key Advantages
✔ High precision & complex geometries
✔ Superior surface finish
✔ Wide material options (steel, aluminum, stainless steel, etc.)
✔ Strict quality control (ISO-certified)
✔ Competitive pricing & fast lead times
1. Fan Counterweight Blocks
| Parameter | Specifications |
|---|---|
| Material | Cast Iron, Ductile Iron, Steel, Stainless Steel, Aluminum Alloy |
| Weight Range | 0.1 kg – 50 kg (customizable) |
| Tolerance | ±0.1 mm (standard), ±0.05 mm (high precision) |
| Surface Finish | Ra 1.6 – 3.2 μm (as-cast), Ra 0.8 – 1.6 μm (machined) |
| Process | Investment Casting (Lost-Wax) + CNC Machining |
| Applications | Industrial Fans, HVAC Systems, Rotating Machinery |
2. Fan Brackets
| Parameter | Specifications |
|---|---|
| Material | Carbon Steel, Stainless Steel (304/316), Aluminum Alloy |
| Load Capacity | Up to 500 kg (design-dependent) |
| Dimensional Accuracy | ±0.2 mm (standard), ±0.1 mm (high precision) |
| Surface Treatment | Sandblasting, Powder Coating, Anodizing (Aluminum), Plating |
| Process | Sand Casting / Investment Casting + CNC Drilling/Milling |
| Applications | Ventilation Systems, Industrial Equipment, Automotive |
3. Custom Casting Services
| Parameter | Specifications |
|---|---|
| Casting Methods | Investment Casting, Sand Casting, Die Casting (upon request) |
| Materials Supported | Iron, Steel, Aluminum, Bronze, Brass, Superalloys |
| Max. Part Size | Up to 1,000 mm (length), 500 kg (weight) |
| Tolerance | ISO CT6-CT7 (as-cast), tighter with machining |
| Secondary Processes | CNC Machining, Heat Treatment, Welding, Surface Coating |
| Certifications | ISO 9001, RoHS compliant, Material Test Reports (MTRs) |
FAQ
We work with a wide range of materials, including:
Cast Iron & Ductile Iron – High strength for heavy-duty applications.
Steel & Stainless Steel (304/316) – Corrosion-resistant and durable.
Aluminum Alloys – Lightweight with excellent strength-to-weight ratio.
Bronze/Brass – Ideal for specialized industrial uses.
Depending on part complexity and volume, we offer:
Investment Casting (Lost-Wax) – Best for high-precision, intricate designs.
Sand Casting – Cost-effective for larger parts.
Die Casting (upon request) – For high-volume aluminum/zinc parts.
As-Cast: ISO CT6-CT7 (±0.2–0.5 mm).
With CNC Machining: Up to ±0.02 mm for critical dimensions.
Yes! We provide full custom casting and machining services. Simply share your:
✔ 2D drawings (DWG/PDF)
✔ 3D models (STEP/IGES)
✔ Samples (for reverse engineering)
Mass Production: 30–45 days (depends on order volume).
Expedited options available.
Yes, we offer:
Material Test Reports (MTRs)
Dimensional Inspection Reports
ISO 9001 Compliance
Our parts are used in:
HVAC & Industrial Fans
Automotive & Aerospace
Power Generation & Machinery
Submit your drawings/specs to [Your Email/Contact Form]. We’ll respond within 24 hours with pricing and lead time.