Jump to content

Recommended Posts

Posted (edited)

Orded a new mainspring for my ETA 2783 movement . Assembled it an discovered that the barrel arbor is to small for the spring end ? Can i press it together ? Otherwise it will slip on the arbor . And yes i orded it as a Eta 2783 mainspring from Cousinsuk 

 

post-644-0-43331900-1437575966_thumb.jpg

Edited by rogart63
Posted

If you have small round nose pliers you can sometimes get away with reshaping the end. I have done thI s in the past with springs when I've been stuck. Be careful, it is easy to break it. Far better to get a spring that fits if you can.

  • Like 1
Posted

If you have small round nose pliers you can sometimes get away with reshaping the end. I have done thI s in the past with springs when I've been stuck. Be careful, it is easy to break it. Far better to get a spring that fits if you can.

Funny that cousinsuk supplied the spring for this movement . The old spring had a broken spring . Right at that end .

Posted

Funny that cousinsuk supplied the spring for this movement . The old spring had a broken spring . Right at that end .

Now that make you wonder.

  • Like 1
Posted

Now that make you wonder.

And it was very brittle . Snaps of just by bending it . Never seen that before . Have some old mainsprings . But they don't brake in that way .They are springy but not brittle . It's like the spring has been hardened from heating . 

Posted

Haven't had much success bending the ends.

 

They usually bend at only one point so you end up with a distinct bend, this creates a stress point and I bet it will break at this point sometime in the future.

 

If you can support the inner coil securely, try rolling on the inside of the coil with a small rod.. this usually tends to close up the metal (think english wheel).

 

 

I would just call Cousins and see what they say... they seem to be pretty efficient and you photograph shows quite clearly that the part will not fit.

 

Anil

  • Like 1
Posted

Haven't had much success bending the ends.

 

They usually bend at only one point so you end up with a distinct bend, this creates a stress point and I bet it will break at this point sometime in the future.

 

If you can support the inner coil securely, try rolling on the inside of the coil with a small rod.. this usually tends to close up the metal (think english wheel).

 

 

I would just call Cousins and see what they say... they seem to be pretty efficient and you photograph shows quite clearly that the part will not fit.

 

Anil

Now i now that to :)  Tried to bend it and snap  :angry: . I think i will order a complete barrel and mainspring . Seen one on Ebay . need a new escape wheel to . This is turning out to be a long term project . 

Posted

You'll get there Roger, it was always going to be a 50/50 shot re-setting the end curl. On old blue springs I draw the temper just at the end before re-shaping. I'm not too sure how modern spring material would have respond to that treatment.

  • Like 1
Posted

Round nosed pliers and an old pair of tweezers always worked for me just be careful don't expect too much at the first attempt you have to gradually manipulate the spring to fit the arbour. 

  • Like 1
  • Recently Browsing

    • No registered users viewing this page.
  • Topics

  • Posts

    • My profile photo is age 20, last century, but I still look exactly the same so I'm not sure it counts ¯\_(ツ)_/¯
    • I sure appreciate your comment! I will look into one of those or maybe something similar. I of course will check your video to have a better idea.  by the way, that’s a beautiful lathe! Mine is a little peersless, but I just bought a Boley & Leinen that is on its way. That’s the one I am looking a motor for. It comes with a motor, but I want to replace it for  one that has a speed controller.
    • Indeed. I would not attempt one. Here is my messy Sherline setup
    • Hello everyone my name is Tom and I and I am new to the forum and new to the hobby. I have always had an interest in mechanical watches and finally decided to pursue it. I’m going thru online trading and have purchased the basic tools to set up a work area. I’m really looking forward to learning and thank you in advance for all of your knowledge!
    • This conversation is becoming a very confusing. The etachron system is a very nice system for manufacturing watches. As you know it consists of two components the stud and the regulator pins. Beautiful thing of this system is you can open up your regulator pins center the hairspring and as you close the pins they will close equally on both sides providing you centered it in the first place. It's not like you're going to become closer to one side or the other as the definition of the regulator pins is a bit confusing it's not exactly a slot sort of. I'm thinking maybe a little eight reading will be helpful for you. Then the file name was changed by me at the US patent but the wording of Seiko may or may not actually be attached to it soared up? I just did that so I can find it in my files. Normally patents are in people's name if they work for a company the company name will be there you'll notice the person lives in Japan which is interesting as the name would imply that this is a Swiss product. Somewhere I think I have the patents for the stud and I believe that is Swiss like a lot of things their Japanese and Swiss and then the Japanese let the Swiss name stand as it seems you more popular in case as you read up on the patents of the regulator pins or pin will see and it should explain exactly how and why it works also why it's important to always close at an open in specific directions because the pins actually have a shaped to them it's very hard to see the shape as it's very tiny.   As a reminder with this system it's mass-produced. I wouldn't be at all surprised if they use cameras and computers to do all of the adjustments.  The meaning of this is that the majority of watches will function as there supposed to and do what they're supposed to do the system will allow us for some minor in tolerance and has more than likely as I said no human hand is ever touched those watches that's the way they left the factory and they work fine. US2007091729A1 seiko etachron.pdf
×
×
  • Create New...