Gears and transmission
Planetary Gearbox 18:24x3:66 (i = 4.67)
- Bounding box
- 150.0 × 150.0 × 105.0 mm
- Engine
- Precision B-rep
- Parameters
- 21
- Published
- September 15, 2026
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The prompt
Central sun gear Has 18 teeth 3 surrounding planet gears Each gear has 24 teeth Outer ring gear Has 66 teeth Precise meshing condition 66 equals 18 plus 2 times 24 Ring gear held stationary Motor drives the central sun gear 3 small gears rotate on their own pins While revolving inside the outer ring gear Carrier connecting 3 planet gears rotates slower Reduction gear ratio is 4.67 Input motor completes 4.67 rotations Output shaft turns exactly 1 rotation
Parameters
| Name | Value | Range |
|---|---|---|
| Gear Module | 2 mm | 1 – 4 |
| Sun Gear Teeth | 18 teeth | 12 – 30 |
| Planet Gear Teeth | 24 teeth | 12 – 40 |
| Ring Gear Internal Teeth | 66 teeth | 40 – 100 |
| Sun/Planet Face Width | 10 mm | 4 – 20 |
| Ring Gear Thickness | 12 mm | 4 – 20 |
| Ring Gear Outer Diameter | 150 mm | 110 – 220 |
| Gear Bore Diameter | 8 mm | 4 – 20 |
| Planet Centre Radius | 42 mm | 30 – 60 |
| Carrier Disc Diameter | 120 mm | 60 – 160 |
| Carrier Disc Thickness | 8 mm | 3 – 20 |
| Output Hub Diameter | 30 mm | 10 – 60 |
| Output Hub Height | 8 mm | 2 – 20 |
| Planet Pin Diameter | 8 mm | 4 – 16 |
| Planet Pin Length | 20 mm | 10 – 40 |
| Motor Body Diameter | 40 mm | 20 – 80 |
| Motor Body Length | 60 mm | 20 – 120 |
| Output Shaft Diameter | 12 mm | 6 – 30 |
| Output Shaft Length | 30 mm | 10 – 80 |
| Shaft Flat Depth | 2 mm | 0.5 – 4 |
| Shaft Flat Length | 20 mm | 5 – 40 |
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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