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Nut Cracker
by tmackay
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Experimental Nut Cracker. Awaiting testing. Pictured with aluminium reinforced jaws, though on its own has a hard bite. Gear ratio 1:41.667. Demo of a gearbox concept: https://www.youtube.com/watch?v=_fb97PWaaFY
Prints in place fully assembled without supports.
IMPORTANT: Print at 0.2mm layer height if using the default model, otherwise ensure layer_h parameter matches your layer height if customizing. Check preview before printing and ensure the 1-layer gap is preserved in the outer ring gears.
Use a sharpened spatula, razor or hobby knife to de-laminate the 1-layer gaps (watch fingers and listen for the "crack"), then turn the knob just a little to get the gears moving. Now "crack" the jaws apart manually by back-driving by a few mm (there should be a little backlash). Now all the parts are free, it will be a bit stiff at first but opening and closing a few times will loosen it up. Then apply petroleum jelly or lubricant of choice to gears and work it in (again by opening an
Prints in place fully assembled without supports.
IMPORTANT: Print at 0.2mm layer height if using the default model, otherwise ensure layer_h parameter matches your layer height if customizing. Check preview before printing and ensure the 1-layer gap is preserved in the outer ring gears.
Use a sharpened spatula, razor or hobby knife to de-laminate the 1-layer gaps (watch fingers and listen for the "crack"), then turn the knob just a little to get the gears moving. Now "crack" the jaws apart manually by back-driving by a few mm (there should be a little backlash). Now all the parts are free, it will be a bit stiff at first but opening and closing a few times will loosen it up. Then apply petroleum jelly or lubricant of choice to gears and work it in (again by opening an
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