3D CAD:
GT2 pulleys for focusing a camera lens

Contents:

1. Calculating number of teeth
2. CAD of 15 teeth pulley, part 1
3. CAD of 15 teeth pulley, part 2
4. CAD of 15 teeth pulley, part 3
5. CAD of 15 save and prepare to print, part 4
6. CAD of 174 teeth pulley, part 1
7. CAD of 174 teeth pulley, part 2
8. CAD of 174 teeth pulley, part 3
9. CAD of 174 save and prepare to print, part 4
10. CAD of 174 clean from support material, part 5
11. CAD of 174 new version, part 6
12. CAD of 174 slicing and printing, part 7
13. CAD of 12 and 15 teeth, new design, part 1
14. CAD of 12 and 15 teeth, printing, part 2
15. CAD of 180 teeth pulley, part 1
16. CAD of 180 teeth pulley, part 2
17. CAD of 180 teeth pulley, part 3
18. To be continued

Note:
I take no responsibility or liability for what are written here, you use the information at your own risk!

7, CAD of 174 teeth pulley, part 2:

Now it's time to CAD the big pulley that will clamp around the focus barrel of the lens.

Make a lock mechanism:

I will make a slit in the pulley, with a screw I can clamp the pulley around the lens' focus barrel. I start with a box.

Change the dimension of it.

Move it to the edge where I later will place the slit.

Making the slit:

Take a new box and modify the dimension of it, 1 mm thick. Place it where I want my slit.

Fine adjust its place to fit between two teeth.

Combine the two part I want to save.

Subtract the slit box.

Yes, a slit !