Extrusion Screw Grinding Jig (3D-Printed) – 20 mm Dia, 20 mm Pitch

This is a complete grinding fixture for making your own plastic filament extrusion screw at home, without a lathe or CNC. It uses a standard 4" angle grinder, 3D-printed parts and off-the-shelf hardware. The fixture holds and guides the workpiece during grinding, so you can get the screw geometry with basic workshop tools. It is designed for a 20 mm diameter screw with a 20 mm pitch. Key features Custom 3D-printed parts (PETG) for holding and guiding the workpiece Adjustable grinder attachment…

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