Getting picnic ready Part 2

 Greetings. Here's part 2 of the project to make my Military Boiling Vessel picnic ready. As discussed on the previous blog page the 24vDC power requirement coupled with a potential power draw of 50 amps would certainly be making conventional auto wiring rather warm at the very least. I did discuss searching for a 12vDC solution. Read on to discover what's been arriving at the workshop from overseas during the last few weeks.

First through the letterbox a 12v DC immersion heater. This hopefully will fit into the hole that the tea tap has occupied for the last 40 years. I wasn't expecting the chinese immersion heater to have the same fixing threads as the british made boiling vessel tap but actually eyeballing the 2 x parts would give a better indication of the plan of action. The immersion heater has a M16x1.5mm thread pitch. The boiling vessel has a slightly larger 3/4"x16 UNF thread. Luckily the immersion heater is smaller and can be inserted into the vacated tap hole. Normally an adapter would be made that had threads internal and external to match the pair.

Hum.....the threads are not a million miles from each other and any adapter would have very thin walls. I'm thinking that cutting the second thread would be impossible due to the wall thickness left after created the first. Now what Albert?

After some thought I have a plan. I did say I'd set out on this mission with no guarantee of success. Don't want to be tripping at the first hurdle though do we.

What I'll do is turn an external piece and an internal piece separately that once accurately sized hopefully slip one inside another. I can maybe then solder the 2 x together.?? Sounds gentle enough to me.......

With this in mind I've purchased the relevant taps and dies for cutting the threads and a bag of brass nuts that are already threaded M16x1.5mm which will save me half a job and also provide half the brass I need too. 

That's it for now peeps. Thanks for tuning in...