3M™ Bayonet to Honeywell/Honeywell North® Filter Adapter

thingiverse

3M Bayonet Adapter for Honeywell/North Filter ================================================ This prototype design is created to ensure compatibility between 3M bayonets and Honeywell/North threaded filters. The adapter should work with chemical, combination, and particle cartridges from Honeywell/North. Part Description: ================ The following adapters are designed based on the specifications provided by erniepike and Clownrock95: * 3M_BAYONET_TO_HONEYWELL_THREAD_ADAPTER_M26X1.57_GEN2.stl * 3M_BAYONET_TO_HONEYWELL_THREAD_ADAPTER_M27X1.5_GEN2.stl These adapters have the following features: * Chamfers added to 3M bayonet to filter mating surfaces to reduce sharp edges. * Redone chamber from underside OD to wrench flats to reduce printing overhang supports. * Added engraved markings on exterior periphery to ID adapter. The Gen 2 model also has a revised chamber and chamfered mating surfaces to ensure proper fitment. 3M Bayonet Adapter for Honeywell/North Filter - Gen 3 ===================================================== The Gen 3 model features the following changes: * Completely reworked 3M bayonet to filter geometry to ensure proper fitment/compression against OEM gasket in locked position. * Reduced OAL of adapter. * Chamfered 45 degrees to the wrenching ears to remove printing overhangs. Disclaimers/Risks: ================ 1. Designed for M27x1.5 and M26x157 threads, but may not be compatible with legacy or newer threads from Honeywell/North respirators. 2. Use proper gaskets to ensure a secure seal between the cartridge and threads. Source a gasket or O-ring for 27 mm OD, 26.016 mm OD, or 1" depending on the model printed. 3. Perform a negative pressure test to ensure a tight seal between the mask and face. Follow SSPs established by your institution or workplace for further guidance. 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. This adapter is only a temporarily ad-hoc solution against biological contagions. To improve durability, apply a thin layer of polyurethane clear coat on all exterior surfaces. Dev. Notes: ============ * Initial model release: 04/10/2020 * Revised model based on feedback from the 3D printing community: 04/13/2020 * Gen 3 model features: 04/28/2020