40MM NATO (RD40x1/7) to MEDOP Threaded Filter (EUROPA Comfort Series) Adapter

thingiverse

Human: 40MM NATO (RD40x1/7) to MEDOP Threaded Filter (EUROPA Comfort Series) Adapter ================================================================== This prototype design for a 40MM NATO (RD40x1/7”) gas mask thread to MEDOP threaded (EUROPA Comfort series) filter adapter makes any RD40x1/7 threaded full face CBRN masks compatible with MEDOP threaded line of chemical, combination, and particle filter cartridges. This expansion helps mitigate PPE shortages by increasing cross compatibility of respirators and filters among different manufacturer models. Part Description: ============== 40MM_NATO_TO_MEDOP_THREADED_FILTER_ADAPTER_MAIN_GEN1.stl 40MM_NATO_TO_MEDOP_THREADED_FILTER_ADAPTER_BASE_GEN1.stl 40MM_NATO_TO_MEDOP_THREADED_FILTER_ADAPTER_GASKET_GEN1.stl The initial model release requires users to apply thread locker at the base to main body joint assembly. Disclaimers/Risks: ============== 1.) Use Proper Gaskets Use an OEM respirator side gasket in the interior pocket, or use the provided gasket as a template to cut out own gasket material at 2 x 27 x 42 mm (thickness x ID x OD). Apply thread locker at the base to main body joint assembly. 2.) Perform Proper Negative Pressure Test Follow SSPs established by your institution or workplace for further guidance. Put on your respirator, adjust straps until they are taught against your face, ensuring no obstructions around the periphery of the seal against your face either due to hair, facial hair, or otherwise. Exhale deeply. Cover all inhalation ports. 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. Use a properly calibrated 3D printer due to tolerances of adapters. If possible, perform hot nozzle pass on all exterior surfaces to reduce surface porosity for FDM based methods. SLS/SLA method preferred. Apply a thin layer of polyurethane clear coat on all exterior surfaces to help resiliency and durability for repeated sterilization and to reduce fomite transmission in printed infill layers. Dev. Notes: =========== 5/20/2020 - Initial model release. Pending 3D printing community support for any fitment and model revisions. Credits: ======== Thanks to Mian0109 for the MEDOP filter adapter. Used images online and his ID/OD, thickness, and depth dimensions to extrapolate the filter side attachment geometry. https://www.thingiverse.com/thing:4253914