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Discussion Starter #1
I've overhauled this Certina for a forum member (good guy:)).

That's all fine but the rubber case ring is as you can see - not the best (but works).
A watchmaker friend gave me this new rubber seal which I cut and fitted but its not nearly big enough.
There are no more Certina rings:undecided:

Any other solutions? (otherwise I'll just leave what its got in there)
 

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Discussion Starter #3
Measure the rubber ring dimensions and buy an o-ring with the same dimensions then cut the crown gap out and fit. I serviced a Certina DS earlier in the year but luckily the case ring was still in one piece.

Good idea but who has case/back seals that fat?
 

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You can buy 'O' section rubber with various diameters, in lengths, specially for these issues, I've used it for prototyping and in emergencies.
Lay it in the groove and then cut it at a shallow angle to give plenty of overlap (avoid a butt joint) and use an engineering grade superglue, not the cheap crap from £1 shops
 

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mechanic's use a Kit to make O-rings when needed so it
can be made to fit. There are O ring kits sold but a bit pricy or go see some
one with a .... " Diesel Engine Repair Shop " or a
Diesel Injector Fuel Pump Repair Service shop.
That's what I use to re-make mine.
They can cut to length and size the O-ring material and you will have one.
 

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Discussion Starter #8
mechanic's use a Kit to make O-rings when needed so it
can be made to fit. There are O ring kits sold but a bit pricy or go see some
one with a .... " Diesel Engine Repair Shop " or a
Diesel Injector Fuel Pump Repair Service shop.
That's what I use to re-make mine.
They can cut to length and size the O-ring material and you will have one.

I know a guy with a truck repair garage. I might go and see them when I go for a long bicycle ride during the week and get one.
 

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In a pinch, can you double or triple up on thinner seals of the correct diameter?
 

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I'm sure it was a kit by Loctite we used to make our own seals if couldn't find originals when at working at sea. Came with a variety of diameters of 'o-ring' material, adhesives and a cutting special jig. A big huge marine 2 stoke engine about 4 floors high - and it still used very small sealing rings :)

Assume Loctite still make it and a whole range of 'professional' range of 'engineering' adhesives.
 

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Looks like you need a movement ring. There are assortments available, as well as individual size-specific plastic rings which can be trimmed to fit. Also, what happened to the autowind rotor?
 

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Discussion Starter #15
Looks like you need a movement ring. There are assortments available, as well as individual size-specific plastic rings which can be trimmed to fit. Also, what happened to the autowind rotor?

The yellow O ring is the original "movement ring":)
That's what Certina DSs have.

The auto rotor post was worn and the spring that clips the rotor on was missing and someone had made up a bad replacement.
 

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did you find a o ring yet?...any automotive store should be able to help or any place that deals with large equipment should have them too....tractors..if i knew the O.D. and the thickness i can try and get you better info too...God Bless John
 

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To make a Movement Ring

Machanic have kits like said, and many machines have and use square
rings used also. These are called ...." QUAD RING's " .

Illustration Picture ...... > [ ] . They are square and come multiple sizes.

The one you need is out there just have to be found.
" Automatic Transmission Repair Shops " would have them, they are use in
the Valve Body Assemblies in may of them.
Check out the shops in your area.
 

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any hydraulic lines use o rings...and are readily available..large trucks too...
 

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Discussion Starter #20
Seems that shouldn't preclude the fitting of a plastic movement ring...depending upon the caliber of the movement. What is the caliber/ligne size?

I agree that's why I asked about an alternative O ring (above).
I wouldn't want to put a plastic movement ring in it - too unoriginal:undecided:

Anyway, its gone back to my customer/friend and forum member Mahuta and he's happy with it:)
 
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