Skip to content

Modular Gear Reducers

Creation's quality: 5.0/5 (1 vote)
Evaluation of members on the printability, utility, level of detail, etc.

3D model description

3:1 gear stages that can be assembled to get a gear ratio to any power of 3.

I needed to reduce the speed of a motor by a large degree. My first tries used a a worm gear, but I didn't have my support settings dialed in well enough to print one yet. I went with this design so it would be easy to add or remove stages depending on the desired gear ratio.

For my current project, I am using 6 stages of gear reduction. 3^6=729 so I have a 729:1 reduction in speed. Included with this is a 1:729 increase in torque.

3D printing settings

Print one of the gear stages and one gear mount. Be careful depending on your machine, as the raft for the gear stage just barely fit on my ToM ABP.

The two pieces screw together using an M3 socket head screw. I used leftover M3x16's from building my ToM, however there is room for larger and smaller lengths. Any extra length of bolt will simply fall into the cutout in front of the gear two stages behind itself, and this actually helps to line them up better as well.

Screw the gear mounts down to a scrap piece of wood, as shown in the pictures. Holes are provided for 2 screws, however I used just the inner hole because it gave more play for the gears (preventing them from jamming) and also more precision in placement because the second screw always seems to move it out of place. Both might be a good idea for just the first one.

  • 3D file format: STL
  • Publication date: 2019/10/01 at 16:27





Best sellers of the category Various

Add a comment

Would you like to support Cults?

You like Cults and you want to help us continue the adventure independently? Please note that we are a small team of 3 people, therefore it is very simple to support us to maintain the activity and create future developments. Here are 4 solutions accessible to all:

  • ADVERTISING: Disable your AdBlock banner blocker and click on our banner ads.

  • AFFILIATION: Make your purchases online by clicking on our affiliate links here Amazon or Aliexpress.

  • DONATE: If you want, you can make a donation via PayPal here.

  • WORD OF MOUTH: Invite your friends to come, discover the platform and the magnificent 3D files shared by the community!