Yet another model that paid a visit to the model doctor…
This is a remix of budgiesarecool's letter opener in the shape of a pocket knife, with the following minor improvements to make it easier to print:
- Finally the correct scale (why everyone kept the wrong scale in their remixes, beats me…)
- Manifold models (thanks to MasonIsLegit)
- Everything is positioned in the best orientation for printing.
- The pin and hole are 4 mm diameter. This makes it easier to ream the hole with a 4 mm drill if needed.
- Two variations on the pin, one narrower and one fatter, such that you can pick the one that fits best (tip: print all 3 of them at the same time, this will avoid that the filament melts into a messy blob).
- A variation on the handle that has a less steep overhang, this makes it easier to print without needing either supports or a lot of cooling.
- Slightly tighter tolerances, to make it less sloppy.
- I have also provided an alternative blade with a serrated edge, which may be better suited to cut through thicker paper.
And to the person who keeps asking this question: yes, it will probably cut thru cardboard if you print it with sufficiently hard filament! :P
0.15 mm (handle), 0.1 mm (blade)
I printed everything with 3 perimeters for increased strength. You may want to print the blade at 100% infill to make it less flexible. The only real reason why I used glow-in-the-dark PLA for the blade, is because it is about the hardest filament I have (of course being able to open letters in the dark is also cool).
You shouldn't need supports, especially not if you print the handle with milder overhangs. Even the original one can be printed without supports if you apply sufficient cooling.
Should even the ‘fatter’ pin still be too loose, simply scale it up by one or two percent until it fits snugly.