Gear set - 3D print and engineering applications
Small confession
Aesthetically, the gear set might not look as attractive as 3D models made by graphics software toolsets like blender, Maya, 3ds max, which achieve better visual quality. The design focuses more on its engineering applications like gearbox, speed reduction and 3D printing and also makes it more durable and manufacturable in use.
About the file package, it includes
Gear set in stl, stp, obj.
Gear set datasheet.
Gear set dimension drawings (from gear teeth 15, 20, 25, 30, 40, 45, 50, 60, 70, 80).
Animations of gear torque and safety factor.
About Gear set
For applications, I put these gears in the torque analysis in order to work out the highest torque they could take, but also 3D print them in order to make sure each gear could work well with each other. The file of datasheet includes each gear's highest torque using ABS material corresponding with the safety factor. With these data, they might be able to help users evaluate the right motors and loads.
Here are few things before using them:
1. The gears use metric system, so its unit is mm (The gear module in the file is 0.8) .
2. The safety factors in the datasheet are based on the ABS material for the gears, so that means the highest torque will be changed with different materials.
3. The safety factors are analyzed in a theoretical or a perfect condition, for example, the gears are solid, so if you 3d print them, their toques are likely to be lower than the datasheet, that is because of the infill density, infill pattern and inconsistent ABS properties from different ABS producers.
4. I chose ABS because it is a tough material and a good indicator for the selection of other materials, it helps roughly evaluate what the strength of other materials might be, for example PLA, PETG, Nylon.
5. The safety factors I chose are around 1.5, this is more of a common practice, it is not a standard, some engineers would use 2 or above. If you use safety factor below 1.5, there will be very little margin for error (allowable load is very close to failure load), the condition might be mostly used for the aircraft design.
6. Last but not least, have fun with these gears!