Commit b03ad3a9 authored by Cass's avatar Cass 🌊

Merge branch 'master' of https://gitlab.com/cxss/site

parents ea309aee d38f059b
_id: 4a060cf0-5c24-11ea-9f21-3106ae375adb
message: '"""they"""?!'
name: Ana
email: ebf261403d0f0011bfd6f8aa6c0b6c9c
date: '2020-03-02T01:22:32.640Z'
---
- project: shrubs.io
date: 2020-03-14
url: https://gitlab.com/cxss/hydroponics
desc: IoT plant & garden management w/ social networking features
- project: ftp.cass.si
date: 2019-12-01
url: https://ftp.cass.si/
......
......@@ -2,6 +2,7 @@
layout: post
title: FFS at 2pass Clinic
date: 2019-11-11 7:58am
draft: true
comments: true
---
......
---
layout: post
title: Sundström P3 filter to 40mm NATO adapter
date: 2020-03-23 8:01pm
comments: true
---
Quick COVID-19 related post, a few weeks ago when this was all kicking off I managed
to get a nice deal on a set of five Sundström P3 filters and 25 pre-filters. The only
issue being that they use a proprietary thread designed only for Sundström masks.
I have a Yugoslavian M1 gas mask which takes 60mm thread, seeing as though modern
filters use the 40mm NATO thread I picked one of those 40-60mm adapters up for a
few quid on eBay the same time as I was getting the filters.
Sundström and arco _do_ sell adapters to these threads but now that we're all in
the shit they've decided to pull stock from civillian hands and re-direct it into
the services.
So to not waste £20 on filters I 3d-modelled my own adapter.
The model is composed of two parts, the thread and a bit that sits on top of the filter.
* <https://ftp.cass.si/009~24g=5.stl>
* <https://ftp.cass.si/f8579=izI.stl>
Firstly, print the two pieces, I used an Ender3 3d-printer with 1.75mm PLA grey filament.
![](https://ftp.cass.si/8N4Z361~=.jpeg)
You can see where this is going... thread goes in hole and circles latch on, I added
a bunch of hot glue to keep the whole thing air-tight on the thread.
![](https://ftp.cass.si/7a9j5i6s4.jpeg)
![](https://ftp.cass.si/4rl=46a0g.jpeg)
The bottom part is measured to be a perfect-ish seal around the rubber ring on the
inside of the filter. I lacquerd the rim of the filter in hot glue and quickly
pushed on the adapter to create a seal.
![](https://ftp.cass.si/14806e0e0.jpeg)
![](https://ftp.cass.si/ew4wgm526.jpeg)
And tada...!, hopefully this helps someone out in the same situation :)
I'm working on the pre-filter part since you can't exactly glue that bit on, I'll update this post when it's done.
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