Jump to content

Fiberglass scratch pencil--how do you trim it?

LittleWatchShop
 Share

Recommended Posts

jdm Distinguished Member

jdm

Posted
Posted

I found that the bristles breaks during use in a way that keeps shape by itself. Great and popular cleaning tool but very dangerous in watch repair. Ask yourself where the fragments are going? Are you willing to use it in a place far away from where you reassemble movements, then clean, blow and inspect everything around, every time you use it? All it takes is a minuscule piece in the wrong place to stop or severely impair a mechanical mov.t.

Link to comment
Share on other sites
HectorLooi Distinguished Member

HectorLooi

Posted
Posted

I don't like fibreglass brushes. They scratch up the surface very badly. And those broken glass fibres sometimes get embedded in the skin! ? It takes weeks for our body to exfoliate one of these pesky buggers.

I prefer to use brass brushes. 

Link to comment
Share on other sites
Michael1962 Distinguished Member

Michael1962

Posted
Posted

I saw a fibreglass brush on a YouTube video, but did not look any further into it. Did not know that you could get a brass brush. I have some small brushes that have brass bristles much like a normal wire brush, but I think even those would be too harsh on clock parts.

Link to comment
Share on other sites
AshF WRT Addict

AshF

Posted
Posted

I love my fibreglass brushes.  Perfect for removing rust.  I also have a brass one but it's not as compact or controllable, maybe I need to find a thinner one.

I get what you're saying about the broken fibres @jdm and @HectorLooi .  I use some dirty rodeco and bench brush down my work surface after I use it.

@Michael1962https://www.cousinsuk.com/category/fibreglass-scratch-brushes

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.

×
 Share
Go to topic listing


  • Recently Browsing

    • No registered users viewing this page.

  • Topics

  • Posts

    • VWatchie
      What are these Seitz B-Jewels?

      By VWatchie · Posted

      That's very interesting information. I haven't tried to see if my bombé jewel holes have olive holes but I think I should be able to tell on the larger jewels at least. See if I get a chance to have a look later today. This little story was very comforting to read for a "bungler" like myself. That success isn't a given even for a pro. Thanks for sharing!
    • Michael1962
      I'm going to be setting up a decent little workshop here at home.

      By Michael1962 · Posted

      I forgot that I said I would do that. Will take some tomorrow and post them up post haste.
    • nickelsilver
      What are these Seitz B-Jewels?

      By nickelsilver · Posted

      I've seen some really nice early 20th century pieces where all the jewels, including center wheel, were convex. Definitely to reduce friction. It can be quite hard to tell if a jewel has olive holes, especially on small sizes, but that again reduces friction- as well as accommodates small misalignments better. Why they aren't used more often? I imagine it was found that at a certain point in the train the actual advantage became negligible, and the added cost on high production movements is why it's not seen on those, just higher-end pieces.   I did an experiment on a little 5x7"' AS 1012 a few years back. These things run OK sometimes, but often are absolute dogs. And AS made gajillions of them. I had a NOS novelty watch in for a service, ran OK flat, massive drop in amplitude vertical. Made like 3 staffs for it trying different pivot sizes, no change. Tried high quality (not Seitz) convex/olive jewels, no change- the original were flat, but could have been olive hole. Same for the pallet fork, then escape wheel, no change. Probably had 20 hours in the watch, new staff and new hole jewels through the escape wheel, no difference in running. Just a dog of a movement. But if I were making a watch I would use them, just because.
    • Neverenoughwatches
      What are these Seitz B-Jewels?

      By Neverenoughwatches · Posted

      When Nicklesilver mentioned the use of them on non coned pivots on older high end watches closer to the escapement.  That suggested to me  probably fourth wheels and possibly third wheels. The square shoulder rotatating on the much smaller surface area of a dome as opposed to a flat jewel surface. I'm curious as to why they are not used predominantly?
    • VWatchie
      What are these Seitz B-Jewels?

      By VWatchie · Posted

      That's what I thought, but as I said, it makes sense. See if any of our pros will have something to add.
×
×
  • Create New...