Jump to content

Gem Tool Question


jdrichard

Recommended Posts

It is indeed a dial test indicator.  This is usually clamped to the vertical rod on a magnetic base, or in the tool post on a lathe for setting up work to be machined.  It can also me used to test for roundness or linear inaccuracies depending how you configure it in relation to the work being examined.  Another common use is for setting a vice on a milling to ensure it is perfectly in line with the milling table.

There will be many more uses for this precision tool, mostly limited by your requirements and imagination.

The one you have in the picture will measure + / - 15 thousands of an inch.

 

  • Like 1
Link to comment
Share on other sites

It is indeed a dial test indicator.  This is usually clamped to the vertical rod on a magnetic base, or in the tool post on a lathe for setting up work to be machined.  It can also me used to test for roundness or linear inaccuracies depending how you configure it in relation to the work being examined.  Another common use is for setting a vice on a milling to ensure it is perfectly in line with the milling table.
There will be many more uses for this precision tool, mostly limited by your requirements and imagination.
The one you have in the picture will measure + / - 15 thousands of an inch.
 

Thanks Geo for explaining its use. Are there any uses for this in watch repair, like the depth change in a shimmed balance cock perhaps?


Sent from my iPhone using Tapatalk Pro
Link to comment
Share on other sites

The only time I have used one in relation to watchmaking, was checking a couple of components for running true when using my watchmakers lathe.

It is unlikely that it would be used for anything else, especially shimming a balance cock.  This is something I would do on a trial and error basis, i.e. add shims until you get the the clearance you require by feel.  Anyway, you have a jacket tool and would be able to shorten the balance staff to get the correct clearance; this would be the correct way to go.

  • Like 1
Link to comment
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.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Restore formatting

  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.



  • Recently Browsing

    • No registered users viewing this page.
  • Topics

  • Posts

    • then just as I want to see if there is any differences I looked in the balance staff book. So basically with the exception of the super shock whatever that is it looks like they're close enough in length  they should be fine.      
    • Thats what i have scott. Read back a little i posted a few pictures. Basically i put a small quantity of around quarter inch in the bottom of a tin and heated it on a leccy oil burner. It doesn't need much heat, stuck the jewels to the lid with bluetack and the fumes coat the surface pretty quickly although the first i did i left for 5 hours but it does only take 5 mins if that. The coating does seem to come off easily so i am not sure if it actually works, but the stuff is really cheap and worth an experiment or two. I have seen that mix somewhere but vapour coat is supposed to be better.
    • Would be interesting to see how well steric acid compares (or not) to the various epilames out there - anyone know the mixing ratios and solvent(s) etc for the steric acid?
    • I assume you're using 9415? the concerned with 9415 and I'm attaching a PDF from Omega is too much can cause a decrease in amplitude. This is why you look at what they do they go to extreme lengths to put extremely tiny quantities. so as you've discovered proper lubrication of the escapement increases the amplitude. We've seen it on this group where people are having typically newbies issues and I will ask if they lubricated the escapement the usual answer is no they had not because and once they did they saw spectacular improvement. one of the amusements with lubrication tends to be so many variations. For instance I was in a classroom once and the students all came from for the most part accredited schools in watch repair. So the instructor asked how did we lubricate our escapement's and I don't remember the actual quantity but it's really quite amazing how many people can interpret slightly different ways of doing the same ask. Of course the instructors method was the approved one. This was the place a drop of oil on the impulse face of the exit stone. Allow one third of the teeth to go by and place another drop then another third and your escapement should be lubricated. But sometimes and yes it will show up in the timing machine you'll see in your regular line because if the oil didn't transfer all the way around to the other stone that does cause a issue with the timing machine. Oh but when I was in school we were using 9010 as 9415 did not exist yet although 941 did which is an oil recommended for escapement's. it has to be dissolved in a proper solvent with the right amount of concentration as you want a microscopic layer on whatever your treating. My understanding is the vapor process is the very best but the vapors are not good for human consumption. The reason why the vapor process is nice is that it puts a very very thin coating on versus dipping in a solvent which can vary depending upon the concentration.   8645_WI_40_rules for lubrication cousins.pdf
    • A modern restorer would probably try to inject adhesive as suggested and then weight the repair down. Some damp might have caused the bulge originally.  Traditionally the veneer would have been sliced and glue eased under the two flaps then again weighted back down and refinished once it had cured.  It doesn't look like just an adhesive issue, more than likely expansion of the veneer, worse case it needs a slice taking out. Try some gentle heat on it first , inject glue and weight, to see where it goes.
×
×
  • Create New...