Mechanical parts
7-Blade Mini Fan Propeller
- Bounding box
- 34.0 × 34.8 × 5.0 mm
- Engine
- Precision B-rep
- Parameters
- 13
- Published
- September 23, 2026
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The prompt
Design a 7-blade mini fan prop with blades symmetrically distributed 360 degrees, where each blade has a length of 1.5 cm measured from the outer edge of the central hub to the blade tip. The blades should feature an aerodynamic aerofoil shape with a twisted pitch angle starting at 25–30 degrees at the root and decreasing to 15 degrees at the tip. The central hub should have an outer diameter of 5.0 mm and a hub height of 5.0 mm, with a 1.9 mm motor shaft hole designed for a tight press-fit onto a 2.0 mm shaft. Apply a 0.5 mm to 0.8 mm fillet at the root joint where each blade meets the central hub to prevent breakage under high rotational force, and add a 0.3 mm chamfer at the shaft hole opening for easy motor insertion and alignment.
Parameters
| Name | Value | Range |
|---|---|---|
| Hub Outer Diameter | 5 mm | 3 – 15 |
| Hub Height | 5 mm | 2 – 20 |
| Shaft Hole Diameter | 1.9 mm | 0.5 – 8 |
| Shaft Hole Chamfer | 0.3 mm | 0.1 – 0.8 |
| Number of Blades | 7 count | 3 – 12 |
| Blade Length (hub edge to tip) | 15 mm | 5 – 60 |
| Root Pitch Angle | 27.5 deg | 5 – 60 |
| Tip Pitch Angle | 15 deg | 0 – 45 |
| Root Chord | 5 mm | 1 – 20 |
| Tip Chord | 3 mm | 0.5 – 15 |
| Root Airfoil Thickness Ratio | 0.14 ratio | 0.05 – 0.3 |
| Tip Airfoil Thickness Ratio | 0.12 ratio | 0.05 – 0.3 |
| Blade Root Fillet Radius | 0.6 mm | 0.5 – 0.8 |
Every value above is a live dimension. Open a model like this in the editor and each one becomes a slider you can drag before exporting.
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