Brackets and mounts
Windmill Rotor (threaded blades, auto-aligned)
- Bounding box
- 156.8 × 179.3 × 57.2 mm
- Engine
- Precision B-rep
- Parameters
- 40
- Published
- November 8, 2026
Download
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The prompt
All-printed windmill rotor with hardware-free hub: collet screws into the hub, collet nut clamps the 8 mm shaft, and each blade screws into a threaded socket in the hub with the thread phase designed so a fully tightened blade is automatically at the correct pitch angle
Parameters
| Name | Value | Range |
|---|---|---|
| Rotor diameter | 200 mm | 100 – 400 |
| Number of blades | 3 | 2 – 6 |
| Blade chord at root | 24 mm | 14 – 40 |
| Blade chord at tip | 12 mm | 8 – 30 |
| Blade thickness at root | 4 mm | 2 – 6 |
| Blade thickness at tip | 1.6 mm | 1.2 – 4 |
| Camber (fraction of chord) | 0.06 | 0 – 0.1 |
| Design tip-speed ratio | 3 | 1.5 – 6 |
| Design angle of attack | 8 deg | 2 – 14 |
| Maximum pitch at root | 36 deg | 20 – 60 |
| Blade thread core radius | 3 mm | 2.5 – 4 |
| Blade thread depth | 1 mm | 0.6 – 1.4 |
| Blade thread pitch | 2 mm | 1.5 – 3 |
| Blade thread radial clearance | 0.25 mm | 0.1 – 0.4 |
| Blade thread loose-side axial clearance | 0.35 mm | 0.15 – 0.5 |
| Blade collar diameter (shoulder that sets the angle) | 12 mm | 9 – 16 |
| Blade collar thickness | 2 mm | 1.5 – 4 |
| Flat seat depth cut into hub for each collar | 2 mm | 1 – 3 |
| Round neck length between collar and airfoil | 4 mm | 2 – 10 |
| Socket inner end distance from axis | 4 mm | 2 – 8 |
| Hub body outer diameter | 28 mm | 24 – 40 |
| Hub body length above the thread zone (blade sockets) | 16 mm | 14 – 20 |
| Spinner nose height | 12 mm | 6 – 24 |
| Bore for 8 mm shaft | 8.2 mm | 8 – 8.6 |
| Optional flat in bore (0 = round bore; file a matching flat on the shaft) | 0 mm | 0 – 1.2 |
| Tapered collet length | 14 mm | 10 – 20 |
| Collet core radius at the tip | 6.2 mm | 5.5 – 8 |
| Collet taper angle (the clamping wedge) | 6 deg | 3 – 10 |
| Slit width between collet fingers | 1.2 mm | 0.8 – 2 |
| Collet flange outer diameter (grip) | 24 mm | 20 – 28 |
| Collet flange thickness | 3 mm | 2 – 6 |
| Stud (hub thread) core radius | 7 mm | 6 – 9 |
| Stud length screwed into hub | 9 mm | 6 – 14 |
| Collet thread pitch (nut and stud) | 2.5 mm | 2 – 4 |
| Collet thread depth | 1 mm | 0.6 – 1.6 |
| Collet thread clearance (per side) | 0.2 mm | 0.1 – 0.4 |
| Collet nut outer diameter | 22 mm | 20 – 28 |
| Collet nut height | 9 mm | 7 – 12 |
| Nut start height above collet tip (loose position) | 0.5 mm | 0 – 2 |
| Gap between collet tip and cover boss (reference shaft) | 3 mm | 1 – 10 |
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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