thingiverse
Nutcracker with conical chamber
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The print takes 7.5 hours and around 125 grams of PLA
Works OK-ish for cracking walnuts size 35mm and for almonds.
I printed it in PLA but has some flex to it. If you print it from something else please tell me how it went.
You will need to sand the axle a little bit because it is too snug.
You can add spring: the pockets are for 4.5mm (I took one from automatic pen)
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This STL file is compatible with most FDM 3D printers (Creality Ender 3, Prusa MK3S+, Bambu Lab, etc.) and resin printers (Elegoo, Anycubic). Check the original page for recommended print settings and materials.
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