Disk coffee filter for AeroPress

thingiverse

Many-use disk coffee filter for AeroPress, crafted from PP (polypropylene) utilizing CNC router. Post-Printing requires use of thin sandpaper to polish the finished product. How I Designed This I own a metallic disk coffee filter for AeroPress that I purchased several years ago for about $9. However, recently I built my first CNC milling router and was impressed by its precision, capable of drilling thousands of small holes and creating a brand-new, free, and shiny filter. Milling Material and Instructions Material I utilized the top of a meal container made from 0.5mm plain PP plastic, which is sufficient for a circle with a diameter of 82 mm. Instruments A 0.3mm drill bit (preferably 0.4mm) and a standard end mill bit (diameter 3.125mm) were used. Milling Process First, use the drill bit to drill the filter, as PP is a soft material that can be drilled at a feedrate of 150 mm/min. The "drill holes" tool in MeshCAM can generate G-Code for this operation. Over 1,500 holes will take approximately 40 minutes to complete. Next, perform the second operation: engraving the edge down to 0.3mm (since AeroPress prefers thin filters) and cutting out the entire filter. Use sufficient speed (400mm/min is suitable) and adequate steps (0.5 or even 1mm is acceptable). However, be cautious not to set too low values, as this may cause excessive heat buildup due to plastic contact, leading to a failed operation. Finally, it is recommended to lightly scrape the surface of the ready filter to remove drilling artifacts. Enjoy your coffee break!