What are these disks?

Discussion in 'Horological Tools' started by Dave Coatsworth, Dec 6, 2017.

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  1. Dave Coatsworth

    Dave Coatsworth Super Moderator
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    Feb 11, 2005
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    Came to me in a watch repair tool lot.

    MysteryDisks.jpg
     
  2. dAz57

    dAz57 Registered User

    Dec 7, 2011
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    Sieves for polishing powders?
     
  3. roughbarked

    roughbarked Registered User

    Dec 2, 2016
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    I showed the image to my master who has been both a watchmaker and manufacturing jeweller virtually all his life and he's way older than me. He said, he's never seen anything like it in his life.
     
  4. chadders1966

    chadders1966 Registered User

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  5. roughbarked

    roughbarked Registered User

    Dec 2, 2016
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    Serious calibrating stuff?
    I suggested grading polishing compounds to my ex master and he just said,, um. and changed the subject. OK he is well into his eighties but He's still making jewellery even though he gave up watchmaking when he had to start fixing the first accutron he'd bought. I remember asking him about a Kundo ATO of his best mates which I remember servicing as an apprentice and that was his reply, I don't know, don't you remember? That's when I gave up fixing the damn things and gave you the job.
     
  6. Dushan Grujich

    Dushan Grujich Registered User

    Jun 20, 2003
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    G'Day!

    I would say that they are nothing else but. My own comparator stand is equipped with a similar anvil rather base also serrated, except that mine is rectangular, not round.

    Cheers

    Dushan

    ?temp_hash=cc1d5f457c19d450c2a6b8993f6d8349.jpg
     

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  7. David S

    David S Registered User
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    Dec 18, 2011
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    Those metrology anvils are very accurately ground for flatness. Does the OP's seem to be the same type of accuracy? With the rim around the edge I would make it more difficult to machine?? Also they look like brass or something.

    Perhaps the OP can add more information.

    David
     
  8. Dave Coatsworth

    Dave Coatsworth Super Moderator
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    Hi David,
    They are steel and do indeed appear to be very accurately machined.
     
  9. David S

    David S Registered User
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    Thank you Dave. From the pic it looked like they were brass or copper.

    Very interesting indeed.

    David
     
  10. karlmansson

    karlmansson Registered User

    Apr 20, 2013
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    Have a look at 0.15 in this video. It shows something very similar to what you have here, albeit in plastic. Looks like it's used to hold screws for easy acess during assembly.

     
  11. Dave Coatsworth

    Dave Coatsworth Super Moderator
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    Thanks, Karl. I think you might be on to something. That would explain the rim.
     

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