balance spring for Hermle 130-070

Posted: Mon Nov 30, 2009 8:41 pm     Post subject: balance spring for Hermle 130-070

Hi,. I'm new to this forum and new(ish) to clock repair, being limited to pendulum movements.
I have been given a clock with one of these movements in it to look at. It wouldn't run at all and I found that someone had tried to shorten the spring by putting a sharp 'S' into it at the point that it was anchored to the chassis. This caused the spring to be pushed off centre and the coils to bind. I have removed the pin holding the spring end and straightened the spring and tried to get a curve to it but am having trouble getting the spring to centre properly. when I do the 'tick' is uneven (like a pendulum clock which isn't level). I had to loosen the balance wheel carrier plate to remove the pin. Could this have an effect on the 'tick'? I have emailed Hermle in Germany to see if I can get another spring/balance wheel. Will I need to do this to resurrect the clock? I believe this clock to have been put in for repair previously as it was continuosly running slow.
Any advice will be gratefully received.

Posted: Tue Dec 01, 2009 2:05 pm     Post subject:

Klockit carries that particular Hermle movement (it would be our #13018). I would suggest contacting our mechanical technician to see if she may have the part available (1-800-556-2548 or 1-800-556-6474). She may even be able to make some suggestions in regard to repair. Hope this helps...

Posted: Sat Dec 12, 2009 8:33 pm     Post subject:

I'm not sure yet if you would be wasting money on a spring.

I say this because these models suffer wear on the barrels and movement.
The mainsprings also tire over time and will be weak. If you spend on a single part and don't address the wear and possible mainsprings it will never go correctly anyway.

Most repairers now replace the WHOLE mechanism as this is more cost-effective and will be for you I reckon.

Look at the back plate and you will see numbers such as 86 or a letter. This denotes the year it was made.