Knife sharpener

thingiverse

This tool is engineered for use with a 3D printer. Angles of sharpening range from 12 to 25 degrees on the side. After 3D printing, ream the holes with an 8mm drill bit. If you can't find the spring, print the "spacer" file (instead of using two "Springs_holder") files. To create this device, you'll need: 1) One piece of laminated resin-bonded chipboard measuring 400x200x16 mm; 2) One stainless steel round bar, 8mm in diameter and 700mm long. You'll need to add a thread to one end, M8x1.25, for 30 mm; 3) Another stainless steel round bar, also 8mm in diameter but only 120mm long. This piece will require a thread on one end as well, M8x1.25, for 20 mm; 4) One right-hand female thread metric rod end, 8mm in diameter (you can find an example at https://www.aliexpress.com/item/ SI8T-K-PHSA8-8/32679845372.html); 5) A pressure spring with an inner diameter of 12 mm and a wire diameter between 1.5 and 2 mm; 6) Two neodymium block magnets, each measuring 20x20x5 mm; 7) Four M4x20 head pan screws and nuts; 8) Two M6x20 hex head cap screws and M6 wing nuts; 9) Eight pan head self-tapping screws, DIN7981, with a length of 22 mm. If you need the source files for this project, they're available at https://grabcad.com/library/knife-sharpener-4.