Gears and transmission
Waterproof Motor Housing with Belt Drive and Propeller Guard
- Bounding box
- 369.0 × 146.0 × 363.0 mm
- Engine
- Precision B-rep
- Parameters
- 36
- Published
- August 8, 2026
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The prompt
1. Motor housing Create a waterproof cylindrical motor enclosure for a 550 brushed DC motor. Motor cavity diameter 38 mm and length 61 mm. Overall enclosure 220 mm long, 82 mm wide and 82 mm tall. Use 4 mm wall thickness and 5 mm structural thickness around the motor mount. Include a removable two-piece housing with M4 screw holes around the perimeter and a 3 mm wide × 2 mm deep gasket groove. Then generate it. Then tell it: Add a removable motor mounting plate for a 550 motor with 25 mm mounting-hole spacing and 3.4 mm mounting holes. Then: 2. Shaft system Add a 5 mm diameter stainless propeller shaft with two 5 × 11 × 4 mm bearing seats spaced 55 mm apart. Add a replaceable 5 mm shaft seal at the water-facing end. Then: 3. Belt reduction Add a 5:1 GT2 belt reduction using a 16-tooth pulley on the motor shaft and an 80-tooth pulley on the propeller shaft. Use a 6 mm wide GT2 belt with approximately 188 mm belt length. Then: 4. Propeller guard Add a cylindrical propeller guard with 88 mm outside diameter, 76 mm inside diameter, 90 mm length and 16 longitudinal ribs, each 5 mm diameter.
Parameters
| Name | Value | Range |
|---|---|---|
| Housing Length | 220 mm | 100 – 400 |
| Housing Width | 82 mm | 40 – 200 |
| Lower Half Height | 41 mm | 20 – 100 |
| Upper Half Height | 41 mm | 20 – 100 |
| Wall Thickness | 4 mm | 1.5 – 10 |
| Motor Cavity Diameter | 38 mm | 20 – 60 |
| Motor Cavity Length | 61 mm | 30 – 150 |
| Screw Hole Diameter | 4.5 mm | 3 – 8 |
| Gasket Groove Width | 3 mm | 1 – 6 |
| Gasket Groove Depth | 2 mm | 0.5 – 4 |
| Groove Offset from Edge | 5 mm | 1 – 15 |
| Gasket Thickness | 2 mm | 1 – 5 |
| Gasket Width | 3 mm | 1 – 6 |
| Motor Mount Plate Thickness | 5 mm | 2 – 10 |
| Mounting Hole Spacing | 25 mm | 10 – 40 |
| Mounting Hole Diameter | 3.4 mm | 2 – 6 |
| Plate Diameter | 37 mm | 30 – 50 |
| Propeller Shaft Diameter | 5 mm | 2 – 10 |
| Bearing Outer Diameter | 11 mm | 6 – 25 |
| Bearing Inner Diameter | 5 mm | 2 – 10 |
| Bearing Width | 4 mm | 2 – 8 |
| Bearing Spacing (center‑to‑center) | 55 mm | 20 – 150 |
| Shaft Seal Outer Diameter | 15 mm | 8 – 30 |
| Shaft Seal Inner Diameter | 5 mm | 2 – 10 |
| Shaft Seal Thickness | 4 mm | 2 – 10 |
| Shaft Length | 150 mm | 80 – 300 |
| Motor Shaft Diameter | 3.2 mm | 1 – 8 |
| Motor Pulley Teeth (GT2 pitch) | 16 - | 8 – 30 |
| Propeller Pulley Teeth (GT2 pitch) | 80 - | 30 – 150 |
| Belt Width | 6 mm | 4 – 15 |
| Pulley Center Distance | 50 mm | 20 – 150 |
| Guard Outer Diameter | 88 mm | 50 – 200 |
| Guard Inner Diameter | 76 mm | 40 – 180 |
| Guard Length | 90 mm | 40 – 200 |
| Number of Ribs | 16 - | 4 – 32 |
| Rib Diameter | 5 mm | 2 – 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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