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Did you know alum spice dissolves steel?


omni

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WristG7.jpg

So just picked up my Airman 7 from my jeweler tonight. He said he could not mechanically tool the broken stem out of the crown that I broke off, so he just dissolved the steel stem in the crown with common alum off of the spice rack!

He first tested it on the crown which had no effect as he said it must be made out of some kind of chrome white metal, so leaving the crown in a solution of alum for a day, it completely dissolved the steel stem piece that was stuck in the crown. I'd never heard of this trick so I thought I'd pass this tidbit on to the modders out their.

To expand on this story, my auto-watchwinder had hard plastic holders that would barely hold this 53mm cased watch, and while putting it in one of the holders, I snapped the crown off the main movement. Needless to say the winder is now in the garbage since it was a cheapie anyway and I was pissed-off. Ordered a stem from Ofrei and hoped I didn't have to order a new crown from Glycine and wait forever. Happily this all worked out well and he had it back to me in 2 days. Have any of you ever heard of this before?

Alls well that ends well and I didn't have to hassle ordering and waiting a month for a new Glycine marked crown.

Cheers

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Wow....cool trick....I gotta try this one.

Any specifics on how to make the solution of Alum? I have seen this come normally as a whitish stone.

Another popular use of the Alum stone is to wet it and rub it on your face after shaving. Works better than any after shave and the face feels baby smooth :p

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Guest HaloArchive

Here is what it is:

Alum: A double sulfate of ammonium. It is used as an astringent, as an emetic and in the manufacture of baking powders, dyes and paper; the commonest form is potash alum (potassium aluminum sulfate). In the kitchen, it is used in pickle making

Cheers,

H

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Greetings Ziggy:

I'm using white vinegar now to disolve a broken stem in a crown. I've had it in the vinegar solution for 4 days with barely no results. Am I doing something wrong?

Regards, Mike

Not that I am aware of, it should work after a week or two...needs to be pure white vinegar to work...

RG

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  • 2 weeks later...
  • 1 month later...

Search and ye shall find!

I remembered a discussion on removing stems from crowns.

In the last week I have run into 2 of them.

A Gerald Genta, running a 7750, and a Rotary Revelation, (Reverso) with a Ronda 785 movement.

The Genta has a most unusual (some may say "bling") crown. I tried to source another, but couldn't get any answers.

So decided to try this vinegar job, to remove the sheared stems.

Bingo....5 days in white vinegar, and the stems are basically gone. I will let them sit another couple, before cleaning up the crown threads.

Now...if anyone can tell me where I can source a split stem for a Ronda 785, ( even the outer end will do) both jobs can be finished.

This place is just a wealth of information.

Offshore

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@Shundi - Hope not, Martini should always be stirred, only Fleming was that pretentious :D

Very true...I don't really know too much about vodka martini's but I would never shake gin...ever!

Regardless, if someone likes them shaken- good for them! If you've never seen Omni's martini shaker...you're in for a treat :)

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