Scratcher
thingiverse
Update: 2017.06.21.: Due to some printing difficulties I reworked the design. The ring part is now one piece, easier to assemble and you can print two part at the same time on a 20cm bed. If you want the old design the package contains a v1.zip archive which has that version. I've decided to make a new toy for my cat. This thing is WIP, parts to be changed. The assembled model will be a 40cm ring.
Download Model from thingiverse
With this file you will be able to print Scratcher with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Scratcher.