JSP® Force™8 To 40MM NATO (RD40x1/7) Adapter

thingiverse

JSP Force 8 To 40MM NATO (RD40x1/7) Adapter ============================================= This is a prototype design for a JSP Force 8 respirator to 40 MM NATO, gas mask thread adapter. This adapter makes the JSP Force 8 line of respirators compatible with RD40x1/7 threaded filter canisters or step-down adapters to enable greater cross-compatibility of respirators and filters to other manufacturer models. If you don't have access to 40MM (RD40x1/7) filters, you can use the following adapters to step down to COTS filter cartridges from these companies: * 40 MM NATO to 3M Filter Adapter <https://www.thingiverse.com/thing:4245358> * 40MM NATO to Scott 742 Series Filter Adapter <https://www.thingiverse.com/thing:4347531> * 40 MM NATO to MSA Bayonet Filter Adapter <https://www.thingiverse.com/thing:4265715> * 40MM NATO to MSA Comfo Classic Filter Adapter <https://www.thingiverse.com/thing:4267676> * 40MM NATO to Honeywell/Honeywell North Filter Adapter <https://www.thingiverse.com/thing:4268775> * 40MM NATO to Honeywell Sperian Filter Adapter <https://www.thingiverse.com/thing:4297348> * 40MM NATO to Honeywell Safety Sperian /Survivair ValuAir (Bayonet) Filter Adapter <https://www.thingiverse.com/thing:4345345> * 40MM NATO to AOSafety Threaded Filter Adapter <https://www.thingiverse.com/thing:4273365> * 40 MM NATO to AOSafety Comfo Classic Filter Adapter <https://www.thingiverse.com/thing:4273414> * 40MM NATO to 3M 6000 Series Filter Adapter <https://www.thingiverse.com/thing:4347531> Alternatively, if you can't source COTS filters, search Thingiverse, there are a number of other DIY filter cartridge designs to mate to other major manufacturer, 3M/MSA/etc respirator's attachment system. Part Description: ================ JSP_FORCE_8_TO_40MM_NATO_ADAPTER_GEN1.stl Initial model release. Disclaimers/Risks: ================== 1. Use Proper Gaskets It would appear that the JSP line of respirators has the bayonet/filter mating surfaces interestingly reversed, the gasket is on the filter side, all that is required is to ensure gasket on the JSP filter side, nominal ID of 36.8 mm and gasket in the RD40x1/7 mask or female adapter. 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 you're running only one filter, ensure the opposite port has a 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: ============ 04/22/2020 - Initial model release. I do not have any JSP 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 Ruszel and BigFootPL for publishing their JSP end caps and adapters.