DIY vapourisers

Hi all,
I plan to make a Bialadin & Tilley vapouriser. What are the thread/tapping dimensions for these vapourisers ?
I'm talking about the tapping between the base and the tube. The one in the photo below


Thank you for your answers.

Gilles

 

Gilles, good luck with your project.

Veritas superb vaporiser

 

See here:

Tilley Quiz: what’s this tap for?

Tony

 

If you're starting from scratch with a length of plain tube I don't see why you can't use a more easy to find tap than the one referred to in the previous post by @Tony Press.

 

Thank's @ROBBO55 & @Tony Press

@Henry Plews , I want to reuse the lower part of each Tilley and Bialaddin

 

That would an interesting project.
Finding a die to make one would be tough. Better to thread it on a lathe.
I wonder how are you going to form the jet end of the vaporizer tube? (assuming that you're planning to duplicate it exactly).

An easier alternative would of course be, to make a serviceable one with a removable jet.

 

@MYN
Thanks for the pictures !
My idea is to make one with a removable jet (250 or 300 CP)
For my 62nd birthday I'm going to buy a mini lathe, a Vevor

 

To re-use the brass lowers of the vapourisers you will need the special tap to cut the thread inside the new tube.

However as Henry says the thread that goes into the cock/jet pricker is 5/16" x 26 t.p.i. British Standard Brass thread. You can find dies for this so you could make the brass lowers as well. Then you can use a "normal" fine pitch thread inside your new tube. https://www.tracytools.com/product/5-16-x-26-tpi-bsb/

Or you can find a toolmaker that will make you the special tap to make the thread to allow you to re-use the lowers.

I have never had one of the Korean/Taiwanese made vapourisers but I am sure that they will not be using such an unusual thread inside the tube. More likley an 8mm Metric fine.

The Vevor lathes are ok - Chinese made and come with different brand names and be prepared to do some cleaning and setting up of shim tensions if you want super high accuracy. But the thread cutting ability will be limited by the feed ratios available - they are really made for Metric thread cutting. You can cut some imperial threads by changing the gears in the head of the lathe - but beyond my experience. Or budget for a die and tap holder tool to go with it.

 

OR, silver solder the brass fitting into the tube.

 

Yes - an expedient solution !

 

Since the tap for 5/16" x 26tpi BSB is available, I'd say just buy it. It won't be that costly.
If you're planning to re-use the brass lower fitting, might as well just tap the tube. The fitting has a rather small central opening/hole. It might make cleaning and de-carbonizing the vaporizer tricky if it is silver-soldered to the tube.

 

Wrong end @MYN - that is the thread that goes into the cock/jet cleaner. The thread that goes into the vapouriser tube is the custom one.

 

I hadn't thought about silver soldering. This is a possible solution, especially with a removable nozzle on the other end

 

Look at the drawing and consider that the original needle/wire is fed in from the bottom. The spring cannot go all the way up as the hole is smaller than the spring, but it allows the very thin wire to go through. If you are going to use a commercial screw-in jet - you need a needle on the end of the wire/rod - but this will be too thin ?
I have found picture on Ebay that may help ?

 

Couldn't recall exactly but is it something like...8.5mm x 36tpi, 60deg angled threads or a 11/32-36tpi, 60deg angled threads? These won't be easy.

 

Thanks for sharing @Fireexit1 , very helpful picts !
This is what I have in my mind

 

Some ideas from my late friend Wilhelm.

 

Thanks @WimVe

 

As I had a W&B vapourizer with a suspected worn jet on hand , I popped the bottom off and measured the threads.
Outside thread to jet cleaner 5/16" x 26 TPI ( 5/16 BSB) as already mentioned.
Inside thread could be 25/64" x 36 which isn't a standard size, or could also be M10 x0.75 which is standard...
And on following @WimVe 's link, the corresponding thread in Springmann's vapourizer is cut M10x0.75, and it appears from the quoted O/D of the vapourizer to be W&B compatible.
Odd that a British firm would use ISO threads back in the day, but stranger things are known...

 

If that is true, then 25/64" would be about 9.92mm.
36tpi would be about 0.7056mm.
It might be possible to make a custom tap based on that.
Making external threads is easier on a lathe with a threading facility. For internal threads, it is harder, unless the bore is larger. A tap would be more handy instead.

M10 x 0.75mm is standard and would be easily available.

 

I bought both M8 x 75 and M10 x 75 taps
I'm waiting to receive the M10 to do a compatibility test

 

It's at home :


I need to find my bearings, the last time I used a lathe was in 1982 or 83....

 

It is like riding a bike ! - you never really forget

 

@Fireexit1 ,
I've always my little wheels on my bike

 

Many Happy Returns Gilles

 

I have a very similar lathe and it's not so bad as you might imagine. The one I purchased needed to be properly set up and adjusted as they seem to be sent out assembled but nothing else!

The strange thread with the fine pitch is difficult to get but I know that @AussiePete has one and might be able to tell you where he got it from. I seem to recall him telling me it is a fountain pen makers thread type!

Good luck with the project, we will all be watching to see how it goes.

 

Which thread are you referring to, @ColinG?

Tony

 

I tapped the dia 11 x 9 brass tube into M10 x 75. I had a little problem with the base, the last 2 threads were blocking. With a few strokes of a file, I can now screw in completely, but you need good pliers. I think it will be waterproof. I will also keep the original needle, it should be effective on a Px or Optimus nozzle. I'm still waiting for the brass round to finalize. More soon...

 

With reference to the thread, I believe it's the thread between the brass section at the bottom and the inside of the steel tube of the vaporiser.

As I say, @AussiePete will have more info but he's away for a while.

 

@ColinG & @Sellig33

I posted above a link to a discussion on this thread (Tilley Quiz: what’s this tap for?).

The tap I have was deliberately and specifically made for repairing Tilley vapourisers.

The company that had it made were specialists, and the company that made the tap still make bespoke taps and dies.

If you look through that thread you will see the manufacturers markings that show the exact thread for the tap.

Best regards

Tony