Metric Tap Set Case

A specific solution to a specific problem. I purchased this metric tap set from Amazon, which didn't include any kind of case for the set. So I set out to make this nifty case to hold all the taps and the tap tool. This set includes M3, M4, M5, M6, M8, M10, and M12 metric taps. It looks like there are many similar tap sets on the interwebs, so there may be additional compatibility with other sets.

Included are the .STL files for the top and bottom halves separated, and the halves combined in a laid-out configuration (how I printed mine). I initially ran into warping issues with the colder Fall temps, so I made a version with a brim incorporated where it's needed, excluding some of the straight edges. Paint-on supports are ideal to support the bridging latch, so I also included .3mf files that include this feature, as well as a solid infill block added to the hinges. Finally, included are .step and .f3d files of the tap case for anyone out there that wants to modify the design. I later took this design to make a general use case with plenty of use cases, including all the design files for modifying.

The case uses the following hardware for the hinge:

2x M3x40mm Socket-Head Screws
2x M3 Lock Nuts

For assembly, do the following:

1. Clean off any brim & supports (if using them)
2. Mate the top and bottom halves as if the case is shut, lining up the hinges
3. Insert an M3 lock nut into the hex hole in one of the hinges
4. Slide in the M3x40mm screw in from the other side of the selected hinge, and turn until the threads engage with the lock nut. Don't completely tighten yet.
5. Repeat steps 3-4 for the other hinge.
6. Simultaneously tighten both screws until the case halves begin to have some resistance in opening.

To latch the case shut, shut the case, and bend the tabs over. Apply pressure in the tab center until it snaps into place. To release, pull on the tab lip until it pops off, which may require excessive force until its “broken-in.” I tried designing this latching mechanism based on how PETG behaved, so other filaments may function differently.