Gears and transmission
Parametric Two-Stage Spur Gear Reducer
- Bounding box
- 194.0 × 130.0 × 100.0 mm
- Engine
- Precision B-rep
- Parameters
- 23
- Published
- September 15, 2026
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The prompt
Design a complex multi-stage speed reducer gearbox in 3D, fully parametric and editable, suitable for mechanical engineering applications. The gearbox should include: - Multiple stages of spur or helical gears (at least 2 stages) - Input and output shafts with proper alignment - Gear ratios between 3:1 and 10:1 total reduction - Rolling element bearings supporting each shaft - A detailed housing (gearbox casing) with removable cover - Mounting holes and realistic wall thickness - Keyways or splines for torque transmission - Fasteners (bolts/screws) for assembly Technical requirements: - Use realistic dimensions and proportions - Apply standard mechanical design practices (clearances, fits) - Ensure all components are separate bodies/parts (fully editable) - Maintain correct center distances and gear meshing - Include proper shaft diameters and bearing seats Output requirements: - Generate as a complete 3D assembly - Each component must be individually editable - Compatible with SolidWorks and exportable as STEP file - Clean feature tree if possible (parametric design preferred) Optional enhancements: - Include exploded view configuration - Add motion capability (gear rotation relationships) - Apply basic materials (steel for shafts/gears, aluminum or cast iron for housing) Goal: Create a realistic, engineering-grade gearbox model suitable for animation, analysis, and academic presentation.
Parameters
| Name | Value | Range |
|---|---|---|
| Module | 2 mm | 1 – 5 |
| Pressure Angle | 20 deg | 14.5 – 25 |
| Stage 1 Pinion Teeth | 20 | 10 – 60 |
| Stage 1 Gear Teeth | 50 | 20 – 80 |
| Stage 2 Pinion Teeth | 20 | 10 – 60 |
| Stage 2 Gear Teeth | 40 | 20 – 80 |
| Gear Face Width | 12 mm | 5 – 30 |
| Shaft Diameter | 15 mm | 10 – 40 |
| Bearing OD | 32 mm | 20 – 60 |
| Bearing Width | 10 mm | 5 – 30 |
| Keyway Width | 5 mm | 3 – 10 |
| Keyway Depth | 3 mm | 1 – 5 |
| Keyway Length | 20 mm | 5 – 40 |
| Shaft Protrusion Length | 30 mm | 10 – 60 |
| Wall Thickness | 5 mm | 3 – 15 |
| Base Height | 10 mm | 5 – 30 |
| Side Wall Height | 60 mm | 30 – 100 |
| Housing Width | 130 mm | 80 – 200 |
| Cover Thickness | 6 mm | 3 – 15 |
| Base Fillet Radius | 2 mm | 0 – 5 |
| Bolt Diameter | 6 mm | 3 – 12 |
| Axial Clearance | 5 mm | 2 – 15 |
| Bearing Clearance | 5 mm | 2 – 15 |
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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