40MM NATO to Moldex® 7000/8000 Series EasyLock® Bayonet Adapter

This prototype design for a 40 MM NATO, gas mask thread, to Moldex® bayonet 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.

Disclaimers/Risks:

1.) 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.) 3D printing materials are not resistant to many solvents, are water soluble, and degrade when exposed to chemicals. 3D printing this adapter is only a temporarily ad-hoc solution against biological threats. Once supply chain return to normal users should purchase OEM OSHA/NIOSH/EN standard approved adapters and respirator accessories.

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.

Credits:

Thanks to namrow’s Moldex® 9400 ABEK1 Cartridge Valve Adapter design that allowed me to pull reference Moldex® bayonet dimensions.