3D-printable shredder

A while back i uploaded a video of my 3D-printable gearbox and some people told me it looked like a shredder, I thought this was actually a nice idea so i build one. I mainly build this thing jut for fun and to show people what the possibilities are with 3D-printed parts because some people still think 3D-prints are not functional and you can only make vases, figures or boats with a 3D-printer. 3D-printed parts of course have their limits like you'll see in the video ;-). Almost every part in this build is 3D-printed, except for the shafts bearings, nuts and bolts etc.

To drive the shredder I used the gearbox I mentioned above. Project can be found here: https://bbprojects.technology/blogs/projects/3d-printed-high-torque-servo-gearbox-version-2

The gearbox was powered by a 3S 2200mah LIPO battery . It's possible to run the gearbox on a 6S LIPO but this would destroy the gears almost immediately in this application.

For the dimensions of the 2 shafts see the drawing that's located in the files section on this page.

It's recommended to use at least 25 percent infill for the structural parts. Use up to 5 outer perimeters and layer heights of at least 0.2mm (when printing with a 0.4mm nozzle). top and bottom layers should be around 1mm.

Print Settings
Filament used:

Creality PLA

Printer used:
Flsun Q5 






STL-files and the Fusion 360 source files can be downloaded here: https://bbprojects.technology/stl-fusion-360-source-files/3d-printable-shredder-model

Drawings for the shafts can be downloaded here

1 × 3D-printable 775 gearbox: link to the project: https://bbprojects.technology/blogs/projects/3d-printed-high-torque-servo-gearbox-version-2
2 × 25x25x277 aluminum profile (see drawing in the files section for exact measurements look in your local hardware store to find one.
4 × 6707 -2RS bearinglink: https://shop.jvl-europe.com/epages/61425996.sf/nl_NL/?ObjectPath=/Shops/61425996/Products/6707-2RS
1 × 3D-printed parts
60 × around 60 screws of 30mm length dimension: 4.5mm diameter, 30mm length, Used to mount everything together
6 × M5 bolt and nut 60mmdimension: 60mm length, used to mount the big gears to the 2 main shafts
2 × M5 thread 140mm + nuts Used to mount the gearbox to the shredder
2 × M5 thread 100mm + nuts Used to mount the gearbox to the shredder
  • Uploaded a video of the shredder to YouTube

11/16/2020 at 18:40


  • @Bruce Kieffaber, I’ve send you an email. Thank you for pointing this out, the files will be updated. You’ll get a notification and you should be able to download the updated files.

    Brian Brocken
  • Missing the file for the bearing shaft adaptor. Have this one bearing shaft adaptor spacer v1. But that is for just two of the ends of the teeth. The smaller adaptor is missing. Would you please post or send it in email? Thank you

    Bruce Kieffaber
  • @ Vinay Kumar I’m sorry I don’t have a good alternative for the 6707 -2RS bearing at the moment. You could try to modify to insert so you can use another type of bearing that suits you best.

    Brian Brocken
  • We were unable to get 6707 -2RS bearings in our country.Kindly provide us alternative

    Vinay Kumar

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