Summary
Video:
I was fascinated by this type of gearbox and always wanted to make one. This type of gearbox is one of the most used in industrial robots. This type of gearbox only has a single reduction (in this case 2 because of the belt reduction) with a very high reduction ratio. Because of the single stage reduction there's almost no tolerance/play between input and output shaft. Conventional gearboxes use more gears to achieve the same reduction ratio, the tolerances between the gears add up resulting in greater tolerances/play between the input and output shaft.
Here are some specifications of the gearbox:
Max tested torque at 12V: 41.3kg*cm or 4N*m
Circular spline teeth amount: 50 teeth
Flex spline teeth amount: 48 teeth
Small GT2 pulley: 16 teeth
Big GT2 pulley: 36 teeth
reduction ratio strain wave gear: (48 - 50)/48 = -0.0416
1/0.0416 = 24.038
Reduction ratio = 24.038:1
Reduction ratio belt drive: 36/16= 2.25
Reduction ratio = 2.25:1
Total reduction ratio = 54.0855:1
The STL-files option includes these files:
-Individual STL-files
The Fusion 360 source files option includes these formats:
-.f3d
-.obj
-.stp/.step
-.3mf
-.fbx
-.skp
-.smt
-.ipt files
Part list, schematics, code and more info about this project can be found here
Printer used:
Flsun Super Racer
Supports:
Yes
Resolution:
0.2
Infill:
25-30%
Note: This is not a physical product. When you're purchasing the STL or Fusion 360 source files you will be able to download these files. A physical product will not be send to your address.
Personal Use License (Standard Included)
See attached license for the use of the files.
Commercial License (Optional Purchase)
Want to sell physical 3D prints of this design? You can purchase the Commercial License as an optional upgrade.
The Commercial License includes the STL files required to 3D print the model and grants you the right to produce and sell an unlimited number of physical copies of the purchased design.
What is allowed:
- Unlimited production and sale of physical 3D prints.
- Selling through online marketplaces, webshops, and physical stores.
- Modifying or resizing the model for physical production.
- Lifetime commercial use with no recurring fees or royalties.
What is NOT allowed:
- Selling, sharing, or redistributing the digital design files (STL, STEP, 3MF, etc.).
- Distributing modified or remixed versions of the digital files.
- Uploading the files to file-sharing platforms or 3D model marketplaces.
- Using this license for other BBprojects designs.
Important: The Commercial License is not included with the standard Personal Use License and must be purchased separately. Only physical 3D-printed products may be sold. Redistribution of digital files is strictly prohibited, even if they have been modified.
By purchasing the Commercial License, you agree to the full BBprojects Commercial License terms included with your download.