40MM NATO to Delta Plus M6000 Jupiter Series Filter Adapter

This prototype design for a 40 MM NATO, gas mask thread, to legacy Delta Plus M6000 Jupiter series filter adapter. This adapter makes any RD40x1/7 threaded full face CBRN masks compatible with Delta Plus line of Jupiter series chemical, combination, and particle filter cartridges to help mitigate PPE shortages by expanding greater cross compatibility of respirators and filters to other manufacturer models.

Part Description:

40MM_TO_DELTA_PLUS_M6000_ADAPTER_GEN1.stl

Single piece construction adapter for Delta Plus M3000 Mars series filters that not require clocking, therefore I choose not to design a two piece version that is backwards compatible with the 40MM to 3M outer shell, unless otherwise requested for greater modularity.

Disclaimers/Risks:

1.) Requires gasket/o-ring on the interior side to ensure proper seal between cartridge and bayonet. Source a gasket or O-ring with a nominal diameter of 32 mm or ~1.26″.

2.) 3D printing materials are not resistant to many solvents, are water soluble, and degrade when exposed to chemicals. 3D printing this adapter is only a temporarily ad-hoc solution against biological threats. Once supply chain return to normal users should purchase OEM OSHA/NIOSH/EN standard approved adapters and respirator accessories.

Dev. Notes:

04/24/2020 – Initial model release. I do not have any Delta Plus series respirators or filters to check measurements, so please report back in comments for any fitment issues and I’ll release revisions as required.

Credits:

Thanks to f2knpw for his Delta Plus mask end caps and filter adapters. I extrapolated what the bayonet geometry was based on female interface and scaling from pictures.
https://www.thingiverse.com/thing:4297891