Gears and transmission
Shaft-Pulley Assembly with Pillow Blocks
- Bounding box
- 300.0 × 120.0 × 131.4 mm
- Engine
- Precision B-rep
- Parameters
- 20
- Published
- November 1, 2026
Download
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The prompt
Create a complete 3D CAD model of a shaft–pulley assembly with two bearing supports for a mechanical engineering college project. Use millimetres (mm). 1. Shaft * Type: Horizontal cylindrical solid shaft * Total length: 300 mm * Diameter: 25 mm * Keep the shaft straight and centered through the assembly. 2. Pulley * Outer diameter: 120 mm * Width: 40 mm * Central bore diameter: 25.2 mm * Position: At the centre of the shaft * The pulley must be perpendicular to the shaft axis. * Create the pulley as a separate editable solid. 3. Bearings * Quantity: 2 * Type: Pillow-block bearing supports * Bearing inner diameter: 25 mm * Bearing outer diameter: 52 mm * Bearing width: 15 mm * Position: One bearing on each side of the pulley * Both bearings must be aligned with the shaft. 4. Bearing blocks * Quantity: 2 * Base length: 70 mm * Base width: 40 mm * Base thickness: 10 mm * Housing height: 45 mm * Place each bearing block below the shaft to support it. * Include two mounting holes in each base, each with a diameter of 10 mm. 5. Assembly arrangement * The shaft passes through both bearings and the central pulley. * The pulley is located at the middle of the shaft. * Place the bearings symmetrically on both sides of the pulley. * Keep the shaft, pulley, and bearings on the same horizontal axis. * Keep the complete assembly stable and properly aligned. 6. CAD model requirements * Generate a complete 3D solid model, not only a 2D drawing. * Show the assembly in a clear isometric view. * Make the shaft, pulley, bearings, and bearing blocks separate editable solid components. * Use simple geometry suitable for a college CAD project. * Do not add a motor, belt, or extra components. * Do not create a rendered image only. Generate editable CAD geometry. * Allow the model to be exported as STEP or another editable CAD format. Use the dimensions above as approximate educational model dimensions. Do not claim the assembly is manufacturing-ready.
Parameters
| Name | Value | Range |
|---|---|---|
| Shaft Length | 300 mm | 100 – 600 |
| Shaft Diameter | 25 mm | 10 – 60 |
| Pulley Outer Diameter | 120 mm | 60 – 300 |
| Pulley Width | 40 mm | 10 – 100 |
| Pulley Bore | 25.2 mm | 5 – 60 |
| Belt Groove Root Diameter | 100 mm | 20 – 300 |
| Belt Groove Width | 20 mm | 5 – 80 |
| Bearing Inner Diameter | 25 mm | 5 – 60 |
| Bearing Outer Diameter | 52 mm | 20 – 150 |
| Bearing Width | 15 mm | 5 – 60 |
| Bearing Offset From Centre | 60 mm | 20 – 140 |
| Base Length | 70 mm | 40 – 160 |
| Base Width | 40 mm | 20 – 120 |
| Base Thickness | 10 mm | 4 – 40 |
| Housing Height | 45 mm | 10 – 120 |
| Pedestal Width (axial) | 32 mm | 10 – 100 |
| Mounting Hole Diameter | 10 mm | 3 – 24 |
| Mounting Hole Spacing | 46 mm | 10 – 150 |
| Saddle Depth | 10 mm | 1 – 30 |
| Saddle Bore Clearance | 0.4 mm | 0 – 5 |
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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