Parametric Nyloc Bed Leveling Knob

thingiverse

I decided to print some custom bed leveling knobs with Nyloc nuts for my new Ender 3 since the stock knobs tend to come loose on their own. My normal go-to knobs that I use on my CR-10 were a bit too wide, and the options for the S4 and S5 were just too small. So, I decided to create one myself, and while doing so, I asked myself "Why not make it parametric and share it with others?" This is the result of my effort. The example model that I uploaded is 56mm across, and it takes an m4 Nyloc nut. Since the pitch of a m4 screw is 0.7 mm, I chose to create it with 7 spokes for 0.1 mm of height adjustment per each spoke turned. Update: I added a new version for m3 screws with 10 spokes (same measurement across); m3 screws have a pitch of 0.5mm, so it will have .05mm of height adjustment per each spoke turned. To customize the bed leveling knob to your personal needs, you need to open the included .f3d file in Fusion 360 and go to Modify>Change Parameters, make your changes, then re-save the .stl file. The available options are as follows: * HubDiameter - Diameter of the center hub * RingDiameter - Outer diameter of outside ring * RingWidth - Width of the outside ring * SpokeWidth - Width of the individual spokes * SpokeCount - Number of spokes You can also edit some of the other settings like screw and nut size if you have different sized screws, hub and ring height, and spoke extension. What you will need: 4x - m4 Nyloc nuts; 1 per knob and 4x - m4 or #8 washers; 1 per bed screw 4x - m4 regular or Nyloc nuts to keep bed screws from spinning; 1 per bed screw Because it takes extra force to tighten or loosen a Nyloc nut, you will need to secure your bed screws so they won't just spin in place. Be sure to place a washer between the bed and nut used to secure the screw to avoid gouging the heating element.