PENCIL BOX - Two Levels - Sliding Cover Lock

Once again I have designed something and sent it to my 3D printer. The following "Pencil Box" - in German you would probably call it "Federtasche" - has come out of it.
I used a wooden one as a template, which I was allowed to make a few decades ago as part of a training course at the Institute for Teacher Training.
Since I like the overall design, I thought it might be something for the 3D printing community.

Dimensions: L 230 W 70 H 55 mm

Supplies:
225 x 53 x 3 mm transparent polycarbanate glass
Can lid with approx. Ø 70-75mm
Sandpaper
1 Phillips screw Ø 4 x 20 mm
1 washer Ø 4,5 x Ø 12 mm
Phillips screwdriver
Fretsaw (fine saw blade)

Preparing Sliding Cover:

If you don't have polycarbonate glass available, you can also print the cover (PencilCase_cover.stl).

For the the polycarbonate lid you need:
225 x 53 x 3 mm transparent polycarbanate glass
Can lid with approx. Ø 70-75mm
Fretsaw
Sandpaper

After you have cut the lid, you must saw out a kind of recessed grip on one side. To draw in the rounding I took the lid from a tin can. The diameter of the lid should be between 70 and 75 mm. After sawing out the rounding, you must carefully break all the edges of the lid (grind them round).

Next, those two parts must be printed first:
Pencil case_bottom.stl
Pencil case_top.stl

Further you need now:
1 Phillips screw Ø 4 x 20 mm
1 washer Ø 4,5 x Ø 12 mm
Phillips screwdriver

Assembly:

First test whether the sliding lid fits and can be pushed without any problems. If it is too difficult to slide, you will have to grind the edges of the lid to fit with sandpaper.

Now you can screw the top part (Pencil case_top.stl) onto the bottom part (Pencil case_bottom.stl) with a Phillips screw Ø 4 x 20 mm. To prevent the screw head from pressing into the material, use a washer Ø 4.5 x Ø 12 mm.

Tighten the screw only so tight that the top part can still be turned.
Now push the lid into the upper part.
That's it! The pencil case is complete!

Remark: As all parts are designed to fit very precisely, it may happen that you have to rework one or the other part a bit with sandpaper and/or cutter due to different dimensional accuracy of the printers and the different behavior of the filaments.

Video: https://youtu.be/7vd5C4aaPB4