hello everyone, I decided to try my hand at making a trench style cigarette lighter out of a popular science magazine from the 50's and have a few questions.
1. it recommends monel metal. what is that? what would be a good substitute? im trying brass without much success
2. on the flint tube, I must tap the inside to #10 x cant remember the threads. and cut the outside to 3/16 by cant remember the number of threads. sorry im at work and don't have the plans here. but with brass I snap the tube off every time cutting the outside. I have even increased the outside from 3/16 to a 5 mm thread still witout luck. so was wondering if there would be a trick such as annealing the brass first or something. or if I just need to find monel metal.
Monel is a high nickle alloy used in corrosive sea water situations. Most
larger metal dealers will have access to it although its us has been pretty
much been replaced by stainless steel as Monel has a lot of copper in it.
Monel comes in various grades, but they are all roughly 1/3 copper & 2/3 nickel, with very small amounts of other stuff. The main use in model and to a greater extent full size steam engines is as firebox stays in locomotive type boilers.
but with brass I snap the tube off every time cutting the outside.
Just a thought - is it possible to cut the outside thread while it is still solid, then drill and tap the internal thread after? If you can do it in that order you have a better chance of the part staying in one piece.
I'd like to be a perfectionist, but I lack the patience...not to mention the skill...