Jump to content

Tool for straightening pivots?


rogart63

Recommended Posts

35 minutes ago, Cad101 said:

hello Seitz do a pivot straightener I think I remember seeing one while surfing one day and nearly having a heart attack at the price.

That would be no surprise? Seitz shall have a look? Exactly but this was obsolete at cousinsuk.https://www.cousinsuk.com/product/balance-staff-pivot-straightening-tool 

Edited by rogart63
  • Sad 1
Link to comment
Share on other sites

12 minutes ago, szbalogh said:

Is it heresy to straighten in its own hole?

In my book, nothing is heresy as long as it works and doesn't screw things up more! If the plan is good....go for it! I've never done it so let us know how you fared!

Cheers,

Bob

Link to comment
Share on other sites

I don't think you would get a perfectly straight pivot by using its own jewel to straighten it because of the hole tolerance. As I could see the pivot straightener uses progressively smaller jewel holes to straighten the pivot. Using the movement hole you would still have a slight bend which would bind with the jewel and cause friction which would affect your amplitude. But then again I may be wrong.

Link to comment
Share on other sites

1 minute ago, Cad101 said:

I don't think you would get a perfectly straight pivot by using its own jewel to straighten it because of the hole tolerance. As I could see the pivot straightener uses progressively smaller jewel holes to straighten the pivot. Using the movement hole you would still have a slight bend which would bind with the jewel and cause friction which would affect your amplitude. But then again I may be wrong.

 

13 minutes ago, bobm12 said:

In my book, nothing is heresy as long as it works and doesn't screw things up more! If the plan is good....go for it! I've never done it so let us know how you fared!

Cheers,

Bob

Did it with the Roskopf's escape wheel pinion. It is not jeweled just a hole in the brass plate. Now its barely visible and running great but You are right, its not perfect. And i think that there is maybe a chance that in a jeweled hole it can crack the jewel?

Link to comment
Share on other sites

36 minutes ago, szbalogh said:

in a jeweled hole it can crack the jewel?

I was thinking this may happen too. There is always the pivot sizing tool I suppose, those that don't have jewels...would they work?

Link to comment
Share on other sites

  • 2 weeks later...
2 hours ago, ramrod said:

what pivot are you straightening? what movement?

Haven't got any pivot right now that needs to be straighten. I saw a great blogg by a Swedish watchmaker and he used a tool for straighten a balance. Looked so cool i had to find out more about the tool. 

Link to comment
Share on other sites

ah. got it. the reason i asked is that i won an auction on fleabay about a month ago and it is all parts - stems, some crowns and 95% pivots. tons of them. i couldn't use them in a lifetime. i'll give them away for anyone that needs them.

Link to comment
Share on other sites

  • 3 years later...

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

    • Now I'm completely confused, it would appear that the epilame  is oleophobic  as @Marc states: This oleophobic  behavior can be seen as beading of the droplet (as above) which stops the oil spreading which is supported by what we observe on treated/untreated cap stones (for example), but as @VWatchie states this should make the drops more mobile, and not less mobile which is the opposite of what we want. In fact this beading and high mobility are desirable properties in things like smart phone covers, see below.  I am fairly sure that epilame doesn't make the droplets more mobile, so maybe its a strange coating with dual properties that are both oleophobic and cohesive/adhesive resulting in low mobility?? This may explain the high price??  
    • The description there is exactly how it's done, and it's very well written!
    • Would it be correct to say that the stronger the mainspring, the thicker the oil should be? So for a fusee mainspring, should a thick grease be used?
    • I started on pocket watches as they are easier to work on than wristwatches. Many had gold cases, which is why there are so many movements for sale. I was always on the look out for cases, for as Nickelsilver says,  a 16s movement will fit any 16s case* (with tweaks to the stem). I also started hand winding mainsprings, before I had winders. It can be done without damage, but it's quite hard on the fingers.  But you can make homemade winders, see here      * some movements, eg "railroad grade", have a setting lever on the edge of the  dial at about the 1 -2 o'clock, so need a special case.
    • Ok, on your movement plate you can see a star wheel on the right, this is the silencer, if you rotate the hands by hand through each hour you will see that eventually it acts upon the cam which moves the lever and in turn lifts the lifting lever thus stopping the chimes and strike working.  What you need to do is get your clock to 11pm and also turn the star until the cam lifts the lever and stops the action. The star wheel has a small spring that gives it a positive action between each movement, so once at 11pm you can rotate the star wheel around by hand until it stops the action at 11pm. Hope this makes sense to you.
×
×
  • Create New...