Automotive Differential Demonstration Model
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3:1 Automotive Differential
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Informacje o modelu
- Źródło
- Printables
- Kategoria
- Automotive
- Licencja
- Creative Commons — Attribution — Noncommercial
Automotive Differential Demonstration Model

This is a 3:1 automotive open differential demonstration model.
This type of differential can be found on rear wheel drive cars and allows each wheel to turn independent of one another.
I created this model as a technical challenge for myself with the intension of it being used as a a DIY kit given to children to build and use as an educational demonstration model.
The gears and shafts were separated to help reduce print times. I opted to use 3mm wooden dowel to pin them together. I have included a 1:1 floor plan to help position the supports but this is to be used as a guide only.
I have also listed the wheels as optional as I ended up using two salvaged hoverboard tyres and built the rims around these dimensions but any type of wheel can be attached.
I would also like to add that to ensure a tight fit some of the parts might require some light sanding but I feel this adds to the building experience.
| Automotive Differential Demonstration Model Print List | ||
| Item NO | Description | Qty |
| 1 | Support 90mm x 20mm | 5 |
| 2 | Support 90mm x 30mm | 1 |
| 3 | G60 Straight Bevel Gear | 1 |
| 4 | G60 Rear | 1 |
| 5 | G60 Support | 2 |
| 6 | G20 Straight Bevel Inner Pinion Gear | 4 |
| 7 | G20 Inner Rear 01 | 2 |
| 8 | G20 Inner Rear 02 | 2 |
| 9 | G20 Straight Bevel Outer Pinion Gear | 1 |
| 10 | G20 Outer Rear | 1 |
| Optional | ||
| 11 | Wheel Hub | 2 |
| 12 | Rim Front | 2 |
| 13 | Rim Rear | 2 |
| 14 | Tyre | 2 |
| Additional Materials | ||
| 15 | 3mm x 15mm Dowel | 30 |
| 16 | 6mm Dowel Various Lengths | |
| 17 | Suitable Wood Screws | 12 |
| 18 | Printed Floor Plan | 1 |
| 19 | M4 x 45mm Bolt (If you are printing wheels) | 8 |
