MSA Comfo (old, 64mm Ø) to Bayonet adapter

thingiverse

I was tasked with creating an adapter for an extremely old MSA Comfo Respirator, which necessitated modifying the original design due to its large 64mm Ø mounts. To address this issue, I resized the model and carefully beveled the top edge, as it was quite sharp. Furthermore, I upgraded and repositioned the bayonet mount, as it was originally recessed too deeply, preventing filters from fitting properly. This modification allowed me to utilize a previously designed bayonet mount that functions seamlessly. Although the adapter currently accommodates round filters with ease, I am uncertain whether it will be compatible with cartridge-type filters at its current height.