Jump to content
  • 0
Sign in to follow this  
east3rn

where to get watch jewel for replacement

Question

Hello. 

I am working on this  vintage A.Schild movement and a jewel on the wheel bridge.

It is a jewel for the 3rd wheel but is cracked so needs replacement.

I measured the outer and inner diameter and they are 1.2mm and 0.17mm respectively.

Could any one help me find the replacement for this jewel??

I am always grateful for your help.

20190327_121733.jpg.d6ca90f7143f7527e3d37c8b0d2b8ce4.jpg

Share this post


Link to post
Share on other sites

5 answers to this question

Recommended Posts

  • 0

first you need to know the shape of the jewel i believe its most likely convex olive shaped. inside shape doesnt mean much so go with olive shaped holes not cylindrical. top shape can be seen with naked eye. its either domed up in (convex) or domed in (flat). you will have to measure the width of the jewel and the pivot with a pivot gauge. pivot gauges are hard to come by...sometimes if you search mainspring gauge on ebay you find one since they look similar to mainspring gauges because they have a slit that you slide the pivot in until it stops. others are jeweled gauges but they are kind of expensive. i attached a sample of both from ebay and the seitz jewels ordering page from ofrei.com. you will see the diagram of jewel shapes.

https://www.ebay.com/itm/Watchmakers-pivot-gauge-jewelling-tool-jacot-tool-Watchmakers-Clearance/323769671356?hash=item4b622d1ebc:g:iSoAAOSwLdVcoPJo&frcectupt=true

https://www.ebay.com/itm/KWM-Zapfenmass-Pivot-Gauge-Clockmakers-Clock-Bushing-Size-Guide-Watchmaker/113713126411?hash=item1a79d49c0b:g:djQAAOSw8bdcrK7c&frcectupt=true

http://www.ofrei.com/page939.html

Share this post


Link to post
Share on other sites
  • 0
10 hours ago, saswatch88 said:

first you need to know the shape of the jewel i believe its most likely convex olive shaped. inside shape doesnt mean much so go with olive shaped holes not cylindrical. top shape can be seen with naked eye. its either domed up in (convex) or domed in (flat). you will have to measure the width of the jewel and the pivot with a pivot gauge. pivot gauges are hard to come by...sometimes if you search mainspring gauge on ebay you find one since they look similar to mainspring gauges because they have a slit that you slide the pivot in until it stops. others are jeweled gauges but they are kind of expensive. i attached a sample of both from ebay and the seitz jewels ordering page from ofrei.com. you will see the diagram of jewel shapes.

https://www.ebay.com/itm/Watchmakers-pivot-gauge-jewelling-tool-jacot-tool-Watchmakers-Clearance/323769671356?hash=item4b622d1ebc:g:iSoAAOSwLdVcoPJo&frcectupt=true

https://www.ebay.com/itm/KWM-Zapfenmass-Pivot-Gauge-Clockmakers-Clock-Bushing-Size-Guide-Watchmaker/113713126411?hash=item1a79d49c0b:g:djQAAOSw8bdcrK7c&frcectupt=true

http://www.ofrei.com/page939.html

Wow thank you again for your advice!!

I was struggling to find where to get the jewels and there it is :D

Actually I have two more things that I am not sure of.

1) I measured the outer diameter of the jewel with the jewel inserted in the bridge.

Is it OK to do so??
 

2) I measured the diameter of the pivot of the 3rd wheel which goes through the jewel and it was 0.16mm.

Does that mean that the inner diameter of the jewel is same as well??

Thank you!!

 

 

Share this post


Link to post
Share on other sites
  • 0
3 hours ago, east3rn said:

Wow thank you again for your advice!!

I was struggling to find where to get the jewels and there it is :D

Actually I have two more things that I am not sure of.

1) I measured the outer diameter of the jewel with the jewel inserted in the bridge.

Is it OK to do so??
 

2) I measured the diameter of the pivot of the 3rd wheel which goes through the jewel and it was 0.16mm.

Does that mean that the inner diameter of the jewel is same as well??

Thank you!!

 

 

no you have to remove the jewel first before you measure its diameter accurately. and yes diameter of the pivot  would be the diameter of the hole in the jewel.

Share this post


Link to post
Share on other sites
  • 0
18 hours ago, saswatch88 said:

 and yes diameter of the pivot  would be the diameter of the hole in the jewel.

No of course.

In that range add 0.01 mm to the pivot diameter and you get the hole diameter.

Frank

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Answer this question...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...
Sign in to follow this  

  • Similar Content

    • By east3rn
      Hello. 
      I am about to work on a Omega ladies automatic watch.
      I found out that the axis of the rotor is out of place and shakes up and down.
      What could be done in this situation?
      Thanks!

    • By east3rn
      Hello watchmakers!
      I am about to work on a vintage citizen watch.
      I removed the movement from the case but I am stuck on removing the automatic rotor..
      It seems that my screwdrivers won't do the job..
      Any advice would be helpful thank you.

    • By east3rn
      Hello I had a chance to acquire to two watch movement+dial sets which are from JLC and AP
      However, I am having trouble finding cases to fit these.
      Could anyone help me find cases that would fit these movements?
      Non genuine cases are OK. 


    • By east3rn
      Hello dear watchmakers!
      I am now working on a SU movement, Slava 2427. It is a manual-wind movement with day-date complication
      I am trying to assemble the watch back together after service but I am stuck on the day disc.
      The day disc is fitted OK in my view, teeth underneath the disc interacts with the click and the disc advances naturally as other motion works move clockwise.
      However, the problem is that the days written on the disc are not in the right position and do not fit inside the day window of the dial.
      What could I have done wrong?? 
      Thank you!
       
       



    • By east3rn
      Hello watchmakers!
      Now I am working on a vintage bifora movement, Bifora Cal.812.
      I have ruined the hairspring while trying to fix the position of it on the balance wheel to 
      adjust the bit error. I am searching for the balance complete or just the hairspring on ebay and other 
      suppliers but I haven't been lucky. May be I need other keywords for my search.
      Could anyone help me find the part I need??
      Thanks!

  • Recently Browsing

    No registered users viewing this page.

  • Topics

  • Posts

×
×
  • Create New...