Product Specifications
|
Specification |
Available Range / Standard |
|
Fan Type |
Axial fan blade or centrifugal impeller |
|
Outside Diameter |
30-500 mm |
|
Blade Count |
3-60 blades |
|
Hub Bore Diameter |
3-40 mm |
|
Rotation Direction |
Clockwise or counterclockwise |
|
Operating Speed |
500-20,000 RPM |
|
Balance Grade |
ISO 21940 G6.3 / G2.5 |
|
Residual Unbalance Target |
≤2 g·mm |
|
Runout Control |
Radial runout ≤0.30 mm; axial runout ≤0.50 mm |
|
Materials |
PP, ABS, PBT, PA66, and PA66 GF30 |
|
Temperature Range |
PP / ABS: -20°C to +80°C; PBT / reinforced PA66: -40°C to +120°C |
|
Hub Interface |
Round bore, D-flat, spline, keyway, metal sleeve, or threaded insert |
Key Features
● Balanced Blade Geometry For Low Vibration
Blade thickness, pitch, sweep, root shape, and cavity filling are controlled across the full impeller. At the specified rotational speed, consistent mass distribution and runout help reduce motor load, vibration, bearing noise, and contact with the surrounding housing.
● Reinforced Hub For Torque Transfer
The hub may use a press-fit bore, D-flat, spline, keyway, threaded insert, metal sleeve, or molded drive feature. The connection is designed to transfer motor torque during startup, speed changes, and extended operation without hub cracking or shaft slip.
● Material And Warpage Control
PP and ABS are suitable for general ventilation products. PBT or glass-fiber-reinforced PA66 is used when higher stiffness and heat resistance are needed. Balanced gating and cooling control the blade plane and pitch, especially when the impeller runs close to a shroud or heat exchanger.
Customization Options
● Blade Geometry
Customize the fan type, outside diameter, blade count, and rotation direction for the airflow target.
● Hub Interface
Define the bore, shaft connection, and mounting structure required by the motor.
● Material And Appearance
Select the resin or reinforcement, molded color, and surface texture for the operating environment.
Customization Process
Requirement Confirmation
Confirm the airflow direction, maximum speed, and motor-shaft interface.
Engineering Review
Evaluate blade strength, hub torque transfer, and balance sensitivity at the specified RPM.
Mold Design And Manufacturing
Design the cavity and cooling system for balanced filling and stable blade geometry.
Trial Molding And Sample Approval
Approve hub fit, runout, blade plane, and rotational balance under the agreed test condition.
Production And Inspection
Monitor part weight, hub dimensions, and blade deformation throughout each lot.
Packing And Delivery
Support the blades and hubs in divided packaging to prevent bending and impact in transit.
Quality Control
● Material And Weight Consistency
Resin grade, reinforcement, drying, color, and molded part weight are monitored for each lot. Material variation or incomplete filling can change both strength and rotational balance.
● Geometry And Balance Inspection
Checks cover outside diameter, blade pitch, hub bore, runout, blade plane, and mounting fit. Static or dynamic balance testing is carried out at the specified speed or balance criterion when it is listed in the control plan.
● Rotation And Final Screening
Trial assemblies are run to check for rubbing, abnormal vibration, hub slip, cracks, flash, burns, and blade deformation. Finished parts also receive a complete visual inspection before packing.
FAQ
Q1: What are the payment terms?
A1: For a custom fan project, the mold fee is paid in advance and a goods deposit follows. The balance is paid after container loading and sealing for EXW or FOB, or before release of the bill of lading for CIF.
Q2: Which shipping terms are supported?
A2: Supported shipping terms are EXW, FOB, and CIF. Since fan blades can deform under stacking pressure, the quotation confirms carton dimensions, internal supports, loading method, and shipment term together.
Q3: What operating data is needed before mold development?
A3: Required data includes maximum and continuous RPM, airflow direction, motor shaft details, available envelope, shroud clearance, temperature range, air volume or pressure target, noise limit, and any required balance grade.
Q4: Can you meet a specified dynamic-balance requirement?
A4: Yes. Before tooling, the balance method, test speed, correction method, allowable residual imbalance, fixture, and sampling plan must be agreed. The target must also match the complete rotating assembly and its operating condition.
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