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My latest impulse purchase


dbane883

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Dropped by my watchsmith's shop today. He had a spare vintage case opener set that was gathering dust. It has found a new home in my basement.

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While the Bergeon No.5 openers are acceptable, nothing fits a genuine Rolex caseback like a genuine opener. The teeth just grab better.; Not to mention the fact that these look so much cooler.

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That is very nice, indeed (I'm thinking photoshoot...).

Like to see how it works and how to handle those tools in person.

Uh, it's the easiest tool to use. It's just a wrench.

Place watch head in holder (picture the holder being clamped to a workbench:

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Place appropriate wrench on caseback:

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Turn , counterclockwise to remove (duh):

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Voila:

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Reverse steps to install caseback.

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I like how there are flush mount screw holes in the case holder to mount it to your bench.  Between screwing that to the bench and a two handed opener handle, I wonder just what kind of torque value Rolex was expecting to be imparted sealing an oyster.  Although we all know it's easier to crank on a caseback than get it off.

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I was taught that threads on a bolt (case back) are the equivalent of a spring. You tighten enough to get some elastic deformation of the piece, to stretch it like a spring so it wants to snap back. Too much tension causes plastic deformation and the bolt (case back) is stretched and useless. It will never stay tight after that.

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  • 2 weeks later...

How hard do someone have to screw back the case back?

I've screwed always with my "feeling" and that's always been fine but really is there "golden" torque or something?

Don't hit me in the face!

 

I have the cheap Bergeon tool and being in the mechanical trade generally use the torque setting FT.00   :inverted:  no problems thus far !  

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