Jewel Cracked on Mainplate

[jdrichard]

The third wheel jewel need to be replaced I think. Is this a typical friction fit and do you think I should replace this jewel?

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[clockboy]

Absolutely you have no other option.

[SteveFitzwater]

Yes, press it out and then "rub in" the new one

[StuartBaker104]

Can't tell from these images if it's a rubbed in or pressed in jewel - you need to look at the outside where you apply the oil. 

If they are rubbed in, then assuming you have the tools, the hard part will be finding a new jewel. You need to open the setting before removing the old jewel.  I spoke to a local watchmaker about this and his advice was that money was better spent on a donor movement than buying collections of old jewels as most of the useful sizes have been used up.

[Alaskamick]

What is the difference between a "rubbed in " jewel and a " Pressed in " jewel in terms of fitting.

[StuartBaker104]

Google is your friend (if you know what you're looking for!):

http://www.geocities.ws/dushang2000/Jewelling.html

 

[szbalogh]

2 minutes ago, StuartBaker104 said:

Google is your friend (if you know what you're looking for!):

http://www.geocities.ws/dushang2000/Jewelling.html

 

Half minute fatser

The OP has rubbed jewels.

[Geo]

Moved to "Watch Repairs Help and Advice" section.

[StuartBaker104]

1 hour ago, szbalogh said:

Half minute fatser

The OP has rubbed jewels.

Well, I too thought they were rubbed jewels and then I thought it must be a view of the flat side of the jewel so not possible to be sure...

[jdrichard]

Yes, press it out and then "rub in" the new one

What do you mean by "Rub in"?


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[StuartBaker104]

8 hours ago, jdrichard said:

What do you mean by "Rub in"?


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It's described in the link I posted above

 

[jdrichard]

Well, I too thought they were rubbed jewels and then I thought it must be a view of the flat side of the jewel so not possible to be sure...

If it's rubbed in, what should the other side of the jewel look like so I can have a look and compare. I do have the tool to open the setting g but do not have the tool to close and burnish it closed!


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[StuartBaker104]

There are some pictures here

http://www.watchservices.co.uk/2012/05/22/new-balance-staff-new-jewel-and-repair-hairspring/

The tools come up on ebay periodically

[jdrichard]

There are some pictures here

http://www.watchservices.co.uk/2012/05/22/new-balance-staff-new-jewel-and-repair-hairspring/

The tools come up on ebay periodically

Hey thanks


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[szbalogh]

On 2016. 10. 28. at 1:08 AM, jdrichard said:

 I do have the tool to open the setting g but do not have the tool to close and burnish it closed!

One can use a hollow stake from the set or grind a hollow punch with the desired pitch and diameter. For the 4 jewels i replaced until now i had to make 2 stakes. Soft steel will do, use oil while opening and closing the setting!

[jdrichard]

One can use a hollow stake from the set or grind a hollow punch with the desired pitch and diameter. For the 4 jewels i replaced until now i had to make 2 stakes. Soft steel will do, use oil while opening and closing the setting!

Thanks for the help


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