Custom made ISO Metric Thread Profiles for Fusion 360 with additional tolerances for better 3D printability.
3D printed threads that work are a bear to print, especially when you use Fusion 360 with no built-in ability to customize them. Usually, we resort to threading our model and then scaling it or some equally imprecise hack to adjust for our printers’ tolerances and the nature of 3d printed parts.
To fix this you need thread files for the ISO Metric Profile with extra tolerances. This download contains ISO Metric Profiles with tolerances ranging from 0.1mm to 1.0mm, optimized for 3D printing applications. To use them, unzip the file and place the *.xml files in the following folder:
C:\Users\%UserName%\AppData\Local\Autodesk\webdeploy\production\%Hash of Version%\Fusion\Server\Fusion\Configuration\ThreadData
NOTE: When Fusion updates, you will need to copy the files into the new version’s folder.
Then, thread your part normally with Fusion 360’s thread tool. Be sure to select “modeled” on the feature settings and to select the tolerance profile you want. Please see attached pictures for examples.
With this download you are also provided with 9 test nuts and bolts. These are attached as a *.stl and a *.f3d file. These use Metric M14-2 threads and have tolerances ranging from 0.0 (Standard) to 0.8mm in 0.1mm steps (Each is marked with the corresponding number of dots/cutouts, 1 for 0.1mm – 8 for 0.8mm). Using an Ender 3 and PETG I printed this set of nuts and bolts to test what tolerance and found 0.5mm to be perfect.
Once downloaded you are free to use these tools as many times as you like (For business or personal), but please respect the substantial time to research and produce these files and do not share.