Jump to content

How do I remove this screw with two holes in it?


luiazazrambo

Recommended Posts

Hi *,

Sorry if this was asked before, I do not know what to look for. How is this type of screw called when it has two holes in it? And most importantly how do I unscrew it without damaging it? Is there a tool for it? How is it called?

The screw in question is marked with red on the pic.

Best regards,

Lui

IMG_20191108_120028.jpg

Link to comment
Share on other sites

It's called a "pig nose" nut.

the typical kind of tool for these is like a screw driver blade with the middle ground out.

https://www.amazon.co.uk/dp/B00EJD1CCY/ref=psdc_1939295031_t1_B07H34XNRM

I have made my own for watch work by adapting an old pair of dividers from an old draftsmans drawing set. I have simply replaced the pointed pins with straight pins.

  • Like 1
  • Thanks 2
Link to comment
Share on other sites

Hi       Well we learn something every day. Its a "pig nose nut" I have undone many of these like Marc with a home made tool, Mine was a screw driver ground and filed for the purpose .  As Marc mentioned use old dividers and they must be old the new ones have only a stud point not much metal to play with.

  • Like 1
  • Thanks 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

    • I did that also for a few movements - well, mainly in/around the train jewels. I made big efforts to epilame the mainplate WITHOUT getting Epilame into the Pallet fork jewels (where it's not supposed to be, right?). I made litte barriers with Rodico around that jewel and used drops from a syringe to apply on the rest.  However, I've now stopped doing this. For three reasons: 1. It's a hassle and consumes more of this liquid gold. 2. I didn't see the need when using HP1000/HP1300 lubricants and grease for most part. The two places where I'd use 9010 (i.e. escape wheel and balance) receive Epilame in specific places... or the cap-jewel-setting of the balance suspends the oil sufficiently be capillary action (see my "conflict" about using Epilame on the balance jewels).  3. Lastly, and here I really wonder about yours and others' experiences: I felt that applying Epliame to the train jewels left them looking hazy (borderline dirty) compared to the (painstakingly achieved) sparkly clean results of my cleaning process. I just can't help but think that the Epilame residuals would mix with the oil and cause more friction/wear. I don't know.    simple: it'll stay there. It won't move any further. That's exactly what is happening if you epilame a cap stone. You end up placing the 9010 right on top of the epilame and the oil will sit nicely on that spot.
    • There are some parts on Ebay for the seiko 6020A, it may just be a waiting game for someone to strip one down, NOS will be more scarce . K would strip your movement down to the module then start looking at other seiko movement to see if that coil is used, then seek out a seiko part dealer. Also Retrowatches youtube owner Mike may give you some advice try him on his site . He also hangs around amateur watchmaking groups.
    • I would agree, in order to work harden something you need to exceed it's yield strength when it moves from the elastic zone to the plastic zone and you get permanent deformation and work hardening which is fairly close to its failure point, relatively speaking and dependent on the material/alloy of course. In theory you can load something constantly within its elastic range and not suffer work hardening issues.
    • Probably easier to get a complete new movement - but CousinsUK list it as discontinued. Maybe someone on here knows a substitute movement ?
    • Any other thoughts on how I can get a replacement coil? Any “hidden” or unknown physical shops (in Australia or elsewhere) that might have them in stock (but not always online)?
×
×
  • Create New...