40MM NATO (RD40X1/7) to AOSafety® R5700 8051 Bayonet Filter Adapter

thingiverse

40MM NATO (RD40X1/7) to AOSafety® R5700 8051 Bayonet Filter Adapter =========================================================== This is a prototype design for 40 MM NATO (RD40X1/7), gas mask thread, to AOSafety® R5700 8051 bayonet adapter, originally requested by glaucolago. Created to make older respirator AOSafety® 8051 filter cartridges compatible with full face CBRN maks. Part Description: ============= 40MM_TO_AOS_R5700_8051_BAYONET_ADAPTER_MONO.stl Single piece construction, as there are no clocking requirements for AOSafety® 8051 circular cartridges. 40MM_TO_AOS_R5700_8051_BAYONET_ADAPTER_INNER_SHELL_LOW.stl 40MM_TO_AOS_R5700_8051_BAYONET_ADAPTER_OUTER_SHELL_LOW.stl Two piece construction, not for clocking purposes, but to allow cross 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. 40MM_TO_AOS_R5700_8051_BAYONET_ADAPTER_INNER_SHELL_HIGH.stl 40MM_TO_AOS_R5700_8051_BAYONET_ADAPTER_OUTER_SHELL_HIGH.stl Two piece construction, not for clocking purposes, but to allow cross 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_AOS_R5700_8051_BAYONET_ADAPTER_MONO_GEN2.stl 40MM_TO_AOS_R5700_8051_BAYONET_ADAPTER_INNER_SHELL_LOW_GEN2.stl 40MM_TO_AOS_R5700_8051_BAYONET_ADAPTER_OUTER_SHELL_LOW_GEN2.stl 40MM_TO_AOS_R5700_8051_BAYONET_ADAPTER_INNER_SHELL_HIGH_GEN2.stl 40MM_TO_AOS_R5700_8051_BAYONET_ADAPTER_OUTER_SHELL_HIGH_GEN2.stl Gen. 2 features engraved markings to identify adapter. Disclaimers/Risks: ============== 1.) Use Proper Gaskets and Shimming Height Under Bayonet Maybe Required Requires gasket/o-ring, below bayonet to ensure proper seal between cartridge and bayonet. Source some washer or O-ring that is nominal ID 31.115 mm or 1.225 in. 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: ========= 04/06/2020 - Initial model release. In work, pending support and feedback from 3D printing community for any fitment and model revisions. 04/14/2020 - Updated with engraved markings to identify adapter type.