Jump to content
  • 0
jakobvinkas

Different mainspring dimensions

Question

Hello!

I have a ETA 900 movement with a broken mainspring that I am looking to repair. I was looking for a replacement and found this information:

http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&&2uswk&ETA_900

With the dimensions: 1.55 x 9.0 x 0.10 x 290

Then when I went to order one on cousinsUK I searched for the movement and found out that they claimed this to be the right replacement:

https://www.cousinsuk.com/category/filter/eta-esa-movement-parts

With the dimensions: 1.55 x 9.0 x 0.105 x 280

Which one should i try to find? will they both the dimensions mentioned do the job? (p.s I do not have the possibility to measure the broken one precise enough) 

Thankful for all answers, regards, Jakob Vinkås

Share this post


Link to post
Share on other sites

3 answers to this question

Recommended Posts

  • 0

Newbie here, but I'm wondering if the slight increase in thickness compensates for the slightly reduced length? Also, what is the "9.0" in this measurement? I'm guessing is has to do with how much is reverse-coiled?

 

EDIT -  Finally found that it looks like it's the intended barrel diameter. Is that correct?

Edited by qhartman

Share this post


Link to post
Share on other sites
  • 0
11 minutes ago, qhartman said:

Newbie here, but I'm wondering if the slight increase in thickness compensates for the slightly reduced length? Also, what is the "9.0" in this measurement? I'm guessing is has to do with how much is reverse-coiled?

 

EDIT -  Finally found that it looks like it's the intended barrel diameter. Is that correct?

From what i know, it is the inside diameter of the barrel

 

14 minutes ago, oldhippy said:

1.55 x 9.0 x 0.105 x 280 Will be fine. It has very little differance. 

 

Thank you for the answer, I will order the one from cousinsUK then.

/Jakob

Share this post


Link to post
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.

Guest
Answer this question...

×   Pasted as rich text.   Paste as plain text instead

  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.

Loading...

×
×
  • Create New...