UNC Helicoil Kit Gridfinity Trays

I have accumulated enough of these kits over the years that it makes sense to get rid of the chincy plastic packaging that they come in, and make some dedicated storage that's easier to access and keep organized.  The kits for UNC threads come with a more basic insert installation tool than the UNF kits, so they fit nicely into 1x3 squares.  They also don't normally include the drill, but for the smaller kits where there's room for the drill, I added a space for that also.  The drill used with the 3/8-16 kit would have been too long for 1x3 squares, and I generally just grab one from my drill index box anyway.

To begin with I have only made holders for ¼, 5/16, and 3/8 kits, although I expect to be making one for 10-24 soon as well [added 07MAY25].  I haven't needed to install helicoils for threads over 3/8", so I have no current plans to add any of those sizes.

I also added the lip to make these stackable.  I don't normally do that with my Gridfinity tool holders, but it might make some sense to stack these for some users.  Maybe forego the magnets if you plan to stack them.

Like my other Gridfinity models, the bases are altered to accept 6x3 magnets as a press fit, with the upper surface of the magnet holes modified to make the slicer bridge across correctly for a clean result.  Due to the size of the models, I have included sacrificial “mouse ears” in the CAD to give the ends more surface area to help prevent them warping off the bed.  These will need to be removed after printing.

The units pictured were printed out of Polymaker ABS on my Voron 2.4, using a 0.6mm nozzle, at 0.3mm layer height.

See also:

https://www.printables.com/model/1295194-unf-helicoil-kit-gridfinity-trays