3M half mask filters

thingiverse

This is a set of 3D printable designs for DIY respirator filters, specifically designed to fit the 3M half-mask respirators. The author created these designs due to the shortage of respirators and filters during the COVID-19 pandemic. The designs include various versions of small and large filters, each with different types of filter covers: 1. Small Filter: * Version 1: Classic design * Version 2: Click teeth * Version 3: No click teeth * Version 4: Grid * Version 5: Grid with click teeth 2. Large Filter: * Classic design * Zig-zag air ducts (for stability) * Grille and snap-in filter cover These designs are optimized for printing on a PrusaSlicer with a 0.4mm nozzle and can be printed from PLA or PETG plastic. The filters use handkerchiefs as the filter medium, which are folded in a specific way to maximize their effectiveness while minimizing breath resistance. The author notes that these designs should not be used as a substitute for proper respirators but rather as an alternative solution during emergencies. Additionally, the author provides links to other 3D printable designs, including: 1. Dust filter covers for 3M half-masks 2. Spare parts for 3M half-mask clamping straps