"Dragonfly" gravity knife, utility knife
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Description
This is a gravity knife with a unique mechanism inspired by AGA Campolin Dragonfly Gravity Knife
The knife holds standard utility blades, which are easily swapable. I have also included a version with a 3d printed blade.
*** Update 13.2.2026
Modified the blade holder slightly:
→ blade is now seated more securely
→ Open position of the knife is now sturdier
→ Allows slightly out of tolerance blades to fit the knife, without hitting the back pin
***
The assembly is really simple:
The mechanism might need a little breaking-in by wiggling back and forth.
I suggest adding a drop of lube to the inner side of the pins, but it will work without it:
The correct blade dimensions (standard trapezoid blade):
Check out my other gravity knife model!
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License
You shall not share, sub-license, sell, rent, host, transfer, or distribute in any way the digital or 3D printed versions of this object, nor any other derivative work of this object in its digital or physical format (including - but not limited to - remixes of this object, and hosting on other digital platforms). The objects may not be used without permission in any way whatsoever in which you charge money, or collect fees.
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