CWC W10 Pendant tube size

[tIB]

Can anyone here confirm the size of pendant tube I need for a W10 from the late 70's? I think it's 2.2OD but thought I'd ask before ordering. 

[AndyGSi]

I think you'll have to measure it.

[tIB]

23 minutes ago, AndyGSi said:

I think you'll have to measure it.

I've measure the hole rather than the tube as it didn't come with one - wondering whether to get one of those 100 tubes of various sizes kits though doubt 2.2 is in there as seems an odd size. Given the price I can probably do both...

[AndyGSi]

2.2 is a Standard tube size but it depends if you want stepped or parallel along with other variables.

[tIB]

3 hours ago, AndyGSi said:

2.2 is a Standard tube size but it depends if you want stepped or parallel along with other variables.

Honestly I've no idea, though thinking about it I think I used to have a technical drawing for it downloaded somewhere - maybe that will show it. Thanks for jogging my memory!

Edit: It doesn't though it's a cool document so I'll upload it: it's the design specs for the G10, which ended up quite a bit different lookswise (the drawing is basically the W10) but more lovely.

 

general_service_electronic_wristwatches_1980.pdf 

 

Think I'll grab one of those mixed bags and hope one of the hundred work out...

general_service_electronic_wristwatches_1980.pdf

Edited July 19, 2024 by tIB

[AndyGSi]

Looking at this video it appears to be a special tube but think you'll probably just have to go with a parallel.

Edit

Just realised with a standard tube you may have a problem with the split stem.

What's the OD of the stem?

 

Edited July 19, 2024 by AndyGSi

[tIB]

1 hour ago, AndyGSi said:

Looking at this video it appears to be a special tube but think you'll probably just have to go with a parallel.

Edit

Just realised with a standard tube you may have a problem with the split stem.

What's the OD of the stem?

 

This one doesn't currently have a split stem - i bought a set of split stem adapters but fitted together was too long. Figured I'd make a temporary solution (which may become permanent!). 

 

[AndyGSi]

Good look but I can't see how you'll get it in without the correct split stem.

[tIB]

6 hours ago, AndyGSi said:

Good look but I can't see how you'll get it in without the correct split stem.

It's in currently, albeit without a pendant tube - my solution(/bodge) was to use a stem extender and only wind clockwise. 

Split stem wise think it needs to be integrated into the stem itself as the adapters protrude too far for the crown to sit correctly. I haven't found one in the UK yet...

[tIB]

Hmm, so couldn't get anything from that bag of spares in, though have got the correct crown on now. 

Not sure on my next steps really - might let my old man take a look at it since he may be able to machine a solution. 

It's either that, open up the hole in the case (don't want to do that) or leave it be. 

Here's the new crown (and crystal - fitted a larger size after the original one worked it's way lose):

[AndyGSi]

Can you not just make your own split stem along the line of the photo below.

 

[tIB]

Just now, AndyGSi said:

Can you not just make your own split stem along the line of the photo below.

 

Tried that, but unless I cut the male adapter it's too long to accommodate the female - sticks out too far when attached to the 2750 stem. 

Should add in terms of next steps I'm thinking in terms of the pendant tube rather than the split stem. 

[AndyGSi]

I presume you're cutting the stem as short as possible as the actual split stem looks like it would be way longer.

[tIB]

6 minutes ago, AndyGSi said:

I presume you're cutting the stem as short as possible as the actual split stem looks like it would be way longer.

The issue with the adapter setup is that the stem itself has quite a bit of unthreaded stem before the threaded part - I toyed with taking a chance on another stem but it's down the line ATM, with the pendant tube the thing I'm puzzling on first. 

[Geotex]

Split stem adapters are available with a range of lengths of that unthreaded portion, so you can get one that is very short when needed.

[tIB]

7 hours ago, Geotex said:

Split stem adapters are available with a range of lengths of that unthreaded portion, so you can get one that is very short when needed.

Oh that's interesting to know - I think Cousins has the one size but if I could find one a couple of mm shorter I could make it fit. Any ideas on stockists? Thanks!

[tIB]

Had a play at shortening mine - managed it but possibly took too much off. If I can sort the pendant tube out I probably have a solution though - if this one doesn't work I'll grab another and take less off (in a slightly more careful manner).

[AndyGSi]

So are you just going to order some 2.2 O/D tubes and see what works best with your crown?

[tIB]

16 minutes ago, AndyGSi said:

So are you just going to order some 2.2 O/D tubes and see what works best with your crown?

I spent yesterday messing with a hundred pack of various size pendant tubes- nothing was too small for the hole let's put it that way!

Externally I have a match (to the crown) but it'll need work to get it into the case - part of me wonders if these were silver soldered in place, though I know the latter g10 tubes aren't. 

 

Not sure what's next tube wise - my dad's solution will probably be to widen the hole to fit, though I don't want that. I wondered about slotting it but it's fiddly work (as you'll probably know!). 

Edited July 25, 2024 by tIB

[AndyGSi]

Would one of these not work?

I'd expect it should be just a press fit with maybe a drop of loctite.

[tIB]

42 minutes ago, AndyGSi said:

Would one of these not work?

I'd expect it should be just a press fit with maybe a drop of loctite.

That's what I was thinking too, though the hole in the case (where C would fit) appears to be less than 2.2mm by quite a bit, hence why I'm wondering if they were soldered.

If slotting a tube out doesn't work I've probably two options - make it 'right' by drilling the case and fit the split stem or leave as is. I'll mull...

[AndyGSi]

I would have expected it to be a standard size tube.

I've got a set of these drills to use when measuring things like tubes along with a 2.1 & 2.2 I got loose.

https://www.cousinsuk.com/product/0105-to-0200mm-set

[tIB]

20 minutes ago, AndyGSi said:

I would have expected it to be a standard size tube.

I've got a set of these drills to use when measuring things like tubes along with a 2.1 & 2.2 I got loose.

https://www.cousinsuk.com/product/0105-to-0200mm-set

That's a good idea - I'll grab one with my next order. When messing earlier I measured with different guage wire - not ideal. Anyhow, a look back at my notes has it at 1.2mm so there's no surprise that none of those tubes fit - smallest was a 1.5 I think. 

Given I need to accommodate either a split stem or an extender think it's going to be a case of live with it as is or drill a nearly 50yr old case for sake of being 'right'. Hmmm...

[AndyGSi]

So even a 1.3mm tube has an I/D of 1.0mm which would be tight even for a 0.9mm stem let alone a split stem.

[tIB]

19 minutes ago, AndyGSi said:

So even a 1.3mm tube has an I/D of 1.0mm which would be tight even for a 0.9mm stem let alone a split stem.

Yeah, I can't imagine this is right as it is - my guess is it's soldered or perhaps the tube has sheared off and partly remains inside the case? I'd be happier having that drilled out of that's the case, assuming it could be rigged up right - I'm not in a rush on this one so will have a chat with my dad when I see him as he'd be doing the machining. 

Turns out he's keen to have a crack at it - I'll have a closer look and go from there...