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I Designed a 3D Printable Balisong Knife
(lemmy.world)
We've been having a good old time with this over on the Pocket Knife community, but I figure there's probably a lot of crossover with this crowd as well.
I'm sure you've seen various clever little one piece utility knife blade holders on Thingiverse and so forth, and while they're quite functional I don't think they're nearly as overwrought or silly enough, nor require quite enough components.
Rather than repeat my entire post from there over here, I'll leave you with these:
Link to .STL Files And Assembly Instructions
Just git gud!
Actually, just flipping around with this it's pretty tough to cut yourself. Obviously the safe side won't cut you, but the blade holder makes a signifigant length of the bite side blunt as well. The edge is only exposed for the last inch and some change, and you mess up the blunt heel section will just bonk harmlessly against your finger. You have to be really choked up on the handle for it to get you.
I think this is actually safer than a traditional balisong (being a DIY contraption made out of whatever bullshit we have lying around notwithstanding) which would have the entire length of one side sharpened.