Homage Forum

The SF240 hairspring could be here, but which one can it be?

http://www.britishprecisionsprings.co.u ... _list.html

EP.- wrote: ↑June 28th, 2023, 11:42 am The SF240 hairspring could be here, but which one can it be?

http://www.britishprecisionsprings.co.u ... _list.html

They should know.

Thanks

I called them, there is no collet and stud. You will have to time it to the balance as well, length and so on.

Yoda wrote: ↑June 29th, 2023, 3:56 am I called them, there is no collet and stud. You will have to time it to the balance as well, length and so on.

Thank you Yoda!

Cousins has collets and pins:
https://www.cousinsuk.com/product/hairs ... wristwatch

Did they give the reference of the SF240 hairspring in their catalog?

EP.- wrote: ↑June 29th, 2023, 4:16 am

Yoda wrote: ↑June 29th, 2023, 3:56 am I called them, there is no collet and stud. You will have to time it to the balance as well, length and so on.

Thank you Yoda!

Cousins has collets and pins:
https://www.cousinsuk.com/product/hairs ... wristwatch

Did they give the reference of the SF240 hairspring in their catalog?

They asked for dimensions, but I didn't have any there and then.

In my search for a hairspring I couldn´t find this page. Did they advice which spring would be possible to work for timing and adjustment? Collets and pins I still should have.
I also wrote them an email, but they weren´t confident to advice one. Maybe with your wisedom Yoda you could get another answer

I know, the best way is to measure width, thickness and length of the damaged hairspring and take it from there.

It's been a long time since I timed a hairspring and I am not sure that I long to do it again.