Rolling Knife Sharpener

I’ve been using the Horl 2 knife sharpener for some time and absolutely love it. However, I always felt it could perform even better if the sharpening stone rotated faster, ideally using an internal planetary gear system. As it turns out, Horl already sells a “Pro” version with exactly that feature… but at around $400, it’s a steep investment. Since I wasn’t ready to spend that much on a sharpener, I decided to create a more affordable alternative made entirely from 3D-printed parts and standard MakerSupply components. This design is fully compatible with Horl 2 sharpening stones (which I already owned). If you don’t want to purchase them separately (the diamond and ceramic pair still comes in at about $100) I also developed a 3D-printed stone system that uses simple sandpaper. I recommend using sandpaper between 800 and 1200 grit to avoid damaging your knives. Here are the links to the stones from Horl if you want to purchase them :Horl 2 diamond stone : https://www.horl.com/fr/en/acc