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Roger the Dodger

The magic expanding gasket.

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Last night, I had to change the battery in my Seiko Sawtooth. On opening the back, there was a little crud that had worked its way under the edge of the caseback, so I decided to wipe it away with a Q tip. Before doing this, I carefully removed the rubber O ring/gasket from its groove in order to do a proper clean up job. When I  came to refit the ring in its groove, I found that it had magically grown by about an eighth of an inch, and wouldn't fit back in without a loop of it still sticking out. I had been very careful not to stretch it when I took it out, so I was a bit baffled. I even put it in the freezer for a few minutes in the hope that it would shrink back, but to no avail. Thoughts of having to order a new one started running through my mind as I decided to have one more go at it. Finally, by easing the ring in a bit at a time and holding what was already in place down tightly, the ring slipped back in. Has anyone else ever come across this strange phenomenon?

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this thing happens with "o  rings"  all  the time,  not only in watches,  in industry.  the answer - Chineezium  ruber or the wrong ruber formula.  (google spell check no longer works).   vin

 

 

 

 

 

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The exact same has happened on a gshock I've been looking at yesterday, but no matter how much I try I can't get the o ring to fit. Time to order a new one I think.

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4 hours ago, Littlelegs said:

The exact same has happened on a gshock I've been looking at yesterday, but no matter how much I try I can't get the o ring to fit. Time to order a new one I think.

   if you put grease on the "o ring",    that is another problem - which lube to use.    a couple new ones on hand is another route.

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