4B EngraverNumbered key fob
45 x 22 mm locker or hotel key fob with a 6 mm ring hole, 3 mm thick. Serial-first: run off a numbered set in one batch.
What fits on it
These are measured on the actual geometry, not estimates. A recessed stroke narrower than 0.8 mm closes up on a 0.4 mm nozzle, so anything below that is thickened automatically or refused.
| Size | 45 x 22 x 3 mm |
|---|---|
| Material | 2.5 cm3 of filament |
| A name on its own | up to 6.0 mm tall, 1.41 mm strokes |
| Name plus a serial | 6.0 mm tall |
| Logo face | logo up to 20.9 mm across |
| Deepest safe engraving | 2.2 mm (1.2 mm is the default) |
How to personalize it
One face carries a logo - the built-in one or a PNG/JPG you upload - with an optional serial number underneath. The other face carries exactly one of a name, a serial number or a logo. You get a live 3D preview, then a Bambu Studio 3MF (print profile and paint-on supports kept) and a plain STL. Batch mode numbers a run of them consecutively and returns one zip. No sign-up, and files are deleted after 7 days.
Printing it
Designed by 4Brains with parametric code, so it prints flat with no supports. Tested on a Bambu Lab H2S with a 0.4 mm nozzle at 0.12 mm layers in PLA on a textured PEI plate. The default 1.2 mm engraving is ten layers deep, which is also enough to fill with a second color at a filament swap - see how deep an engraving should be and the smallest text a 0.4 mm nozzle can print.
Try it on your own model. Upload an STL or 3MF, add a logo, a name or a serial number, and download a print-ready file.
Open the engraver — free