Knife Sharpener

thingiverse

I got two 1-inch cube rare-earth magnets from Amazon for a pretty low price, which I've been wanting to use to make a knife sharpener. The magnets are epoxied on the bottom side, with small channels to allow excess epoxy to escape. Be extremely careful handling the magnets because they're difficult to manage. To start building the sharpener, you'll need some M5 screws and nuts, as well as a 5/6 bolt that's 2 inches long. Additionally, you'll require two 385mm (or longer) hardened steel rods, similar to those used in 3D printers. Cut one of the bars into two 95mm lengths for the support legs and use the remaining piece as the upright bar. The parts for the upright bar can be found on Thingiverse at https://www.thingiverse.com/thing:2629911. You'll also need either Apex sharpening stones or this alternative https://www.thingiverse.com/thing:2645800, along with some sandpaper. To secure the paper in place, you're supposed to snap little wedges into position; however, I found that contact adhesive works much better. Use the other full-length bar, a spring that slides over it, and a few M3 screws and nuts to complete the build.