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Principle of the Bergeon 1A (cap jewel) automatic oiler

Jimbo

By Jimbo
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Jimbo Member

Jimbo

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Hi Kids, 

So I'm still wondering how, when you oil the cap jewel when installed in the hole-jewel setting, you don't end up losing a bunch of oil on the inside (i.e. balance side) of the hole jewel, given that the viscosity of the oil makes the drop wider than the hole jewel opening. Does this happen to you?

Do you just insert it and push, or do you prime it first with a retraction, or what? Or retract first, insert it retracted, and then release? But doesn't that create the same problem as the end pin carries the oil through the hole? I can't see that the sheath fits through the hole of the jewel.

Thanks, 

Jim

Edited by Jimbo
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Make sure oiler is clean, I always dip it in rodico first to get rid of any excess oil already on the end and then just put the end of oiler in the hole keeping oiler straight(90 degrees) and flick the button, job done, pull the oiler straight out. Hold the setting, bridge or cock with tweezers or peg wood to stop it moving as you pull the oiler straight out, this stops the oil from going on the outside of the hole.

With most shock settings it's easier to do it with the cap jewel and shell out of the setting which would be out anyway for the cleaner.

For Rolex escape wheel endstones it's done whilst endstones are in the watch(take them out for the cleaning machine though), this is because there's no outer shell that comes out with the endstone. The same goes for older Watch's with a balance endstones that doesn't come out. I would always remove the balance from the cock if there's no room to get underneath without touching the hairspring with the oiler though.

These oilers take a bit of getting used to but once set up properly you should be able to get the perfect round bubble to cover 2/3rds of the surface area of the jewel which is about perfect. The faster you pull the button the less oil comes out, for a small jewel flick it quickly, for a larger one do it a bit slower or flick it twice.

 

 

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Jimbo Member

Jimbo

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Posted (edited)

Thanks Tik, I'll practice. The quick flick hadn't occurred to me but maybe that's the way to conquer surface tension through the hole.

J

Edited by Jimbo
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You will always get a little bit of oil around the entrance to the hole but oil will end up there anyway once the balance pivots are sat in place, the oil will be sucked out slightly which is what is supposed to happen, that's why the bubble sometimes shrinks a bit when it's been running a while because it's run down/up the pivot.

 

IMG_0951.JPG

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jdm Distinguished Member

jdm

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Posted
3 hours ago, Jimbo said:

Thanks Tik and everyone. I finally took a look through the microscope. The results really are amazing.

Any pic?

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