Screw Nutcracker for Walnuts – Cracks Slowly, Kernels Stay Whole

This is a screw nutcracker for walnuts: put the nut in the cup and turn the knob – the screw comes down through the arch and cracks the shell slowly, so the kernel stays in one piece and no shell bits fly across the table.

For walnuts up to about 38 mm

Body 62 × 50 mm, 95 mm high; 24 mm screw with a 3 mm pitch and a knurled knob

Body prints upright (the arch is pointed, the thread is vertical), the screw stands on its knob – no supports

Print it with 4 walls and 30 % infill; PETG or PLA both work.

This is the free basic version. The complete set is "Screw Nutcrackers – Walnut and Hazelnut Crackers with Coarse Thread" – you'll find it in the Layerline shop on Cults3D.