40MM NATO (RD40X1/7) to Moldex® 7000/9000 Series EasyLock® Bayonet Filter Adapter

thingiverse

Human: 40MM NATO (RD40X1/7) to Moldex 7000/9000 Series EasyLock Bayonet Filter Adapter ================================================================ This prototype design for a 40 MM NATO (RD40x1/7), gas mask thread, to Moldex bayonet filter adapter, for 7000/9000 series respirators. The adapter should make RD40x1/7 threaded full face CBRN masks compatible with Moldex bayonet EasyLock chemical, combination, and particle cartridges. Part Description: ============= 40MM_TO_MOLDEX_BAYONET_ADAPTER_GEN1.stp Single piece construction adapter, for Moldex 7000/9000 series bayonet EasyLock filters that do not require clocking, bayonet was sized from namrow's Moldex 9400 ABEK1 Cartridge Valve Adapter. https://www.thingiverse.com/thing:4205509 40MMTO MOLDEX _BAYONET_ADAPTER_INNER_SHELL_LOW.stl 40MMTO MOLDEX BAYONET_ADAPTER_OUTER_SHELL_LOW.stl Two piece construction, not for clocking purposes, but for backwards compatibility to outer shell of previous Gen 4 40 MM to 3M bayonet adapter. Tolerance are more forgiving, lower, to enable ease of 3D printer variation. 40MMTO MOLDEX _BAYONET_ADAPTER_INNER_SHELL_HIGH.stl 40MMTO MOLDEX _BAYONET_ADAPTER_OUTER_SHELL_HIGH.stl Two piece construction, not for clocking purposes, but for backwards compatibility to previous outer shell of Gen 3 40 MM to 3M bayonet adapter. Higher tolerance parts requiring proper scaling and calibrated 3D printer. 40MM_TO_MOLDEX_BAYONET_ADAPTER_MONO_GEN2.stl 40MM_TO_MOLDEX_BAYONET_ADAPTER_OUTER_SHELL_HIGH_GEN2.stl 40MM_TO_MOLDEX_BAYONET_ADAPTER_INNER_SHELL_HIGH_GEN2.stl 40MM_TO_MOLDEX_BAYONET_ADAPTER_OUTER_SHELL_LOW_GEN2.stl 40MM_TO_MOLDEX_BAYONET_ADAPTER_INNER_SHELL_LOW_GEN2.stl Gen. 2 features engraved markings to identify adapter. Disclaimers/Risks: ============== 1.) Use Proper Gaskets 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 24.226 mm or ~0.95". 2.) Perform Proper Negative Pressure Test Follow SSPs established by your institution or workplace for further guidance. But in general, don your respirator, adjust straps till taught against face, ensuring no obstructions around the periphery of the seal against face either due from hair, facial hair, or otherwise. Exhale deeply. Cover all inhalation ports. (Typically, most full face or half face respirators have two filters, so cover those intake ports with your hands. If your running only one filter, ensure the opposite port has filter cap in place.) Now inhale deeply. The mask should suck tightly against your face without any air leakages. Re-test if adjustments are required at gasket/o-ring interfaces at the adapter. 3.) Use At Own Risk – Temporarily Solution Only Until Supply Chain Normalizes 3D printing materials are not resistant to many solvents, are water soluble, and degrade when exposed to chemicals, heat, and UV/sunlight. 3D printing this adapter is only a temporarily ad-hoc solution against biological contagions. In addition to using a properly calibrated 3D printer, due to tolerances of adapters, if possible perform hot nozzle pass on all exterior surfaces, to reduce surface porosity. Highly recommended users apply a thin layer of polyurethane clear coat on all exterior surfaces, spray or dip based methods, to help resiliency and durability for repeated sterilization and to reduce fomite transmission in printed infill layers. Once supply chains return to normal, users should purchase OEM OSHA/NIOSH/EN standard approved respirators, adapters and accessories for their institution and workplaces. Dev. Notes: ========== 04/10/2020 - Initial model release. I do not have Moldex 7000/9000 series respirators or filters to check measurements, so please report back in comments for any fitment issues and I'll release revisions as required. 04/14/2020 - Updated with engraved markings to easily differentiate between adapters. Credits: ====== Thanks to namrow's Moldex 9400 ABEK1 Cartridge Valve Adapter design that allowed me to pull reference Moldex bayonet dimensions.