Suspension spring for S Haller Simonswald 400 day clock

[KurtinSA]

shutterbug, I have the same clock and have adjusted the pendulum all the way to the minus side the clock is still running really fast, I am using a .003 spring also. any suggestions on how to slow the clock down. could I use a thinner spring? Thank you.

As he said, thinner springs would make it run slower. But what thickness? You should put the pendulum adjustment in the center and then time how long it takes to get 8 beats...should be 60 seconds. The rule of thumb is that 0.0001" equates to 4 seconds. If you're only off by 4-6 seconds, maybe you could thin your current spring. More than say 8 seconds, you're better buying a proper spring and go from there.

Kurt

 

[Tony3900]

As he said, thinner springs would make it run slower. But what thickness? You should put the pendulum adjustment in the center and then time how long it takes to get 8 beats...should be 60 seconds. The rule of thumb is that 0.0001" equates to 4 seconds. If you're only off by 4-6 seconds, maybe you could thin your current spring. More than say 8 seconds, you're better buying a proper spring and go from there.

Kurt

Thank you

 

[Tony3900]

Thank you

Thank you Kurt. I successfully thinned my first spring. I started out reaching my 8 beat count 11 seconds early with a .003 spring, and that was adjusted all the way to minus. I put the pendulum dial to center and sanded away on my spring. a few trials later and my clock is keeping time without having to adjust the center dial. You guys are great and I did learn a lot from this experience, and will remember this for years to come. Thanks again

Tony G.

 

[PetitLuc]

Thank you Kurt. I successfully thinned my first spring. I started out reaching my 8 beat count 11 seconds early with a .003 spring, and that was adjusted all the way to minus. I put the pendulum dial to center and sanded away on my spring. a few trials later and my clock is keeping time without having to adjust the center dial. You guys are great and I did learn a lot from this experience, and will remember this for years to come. Thanks again

Tony G.

Hello,
I bought the same Haller clock with a broken spring.
Spring length being 120 mm I ordered a 0.003" spring from Cousins.
The clock ticks at a 10 beats per minute, while it should be 8!
All the parts seem's to be original, looks identical to pictures posted above, thus I don't know where to go.
I measured the spring thickness, it is truly 0.003".
Cousins has only one model for 120 mm.
What could be wrong?
Luc

 

[KurtinSA]

Is there a way that you can accurately confirm the spring thickness of 0.003"? What does the pendulum weight? I have a similar clock and the pendulum weighs around 178 grams.

Kurt

 

[PetitLuc]

Is there a way that you can accurately confirm the spring thickness of 0.003"? What does the pendulum weight? I have a similar clock and the pendulum weighs around 178 grams.

Kurt

Hi Kurt,
I measured thickness with a micrometer.
Weight is roughly 165-170 g.
Meanwhile I found the broken spring, it 0.0023", seems to be made of bronze

 

[KurtinSA]

Hmmm...the bronze spring suggests it is an original one, not the style that is currently available. Other versions of the S. Haller clock use a 0.0022" spring, but those springs are much less than 120 mm long, less than 100 mm per the repair guide. So, likely not for your clock if it looks like the images first shown in this thread.

Your weight is a bit less than nominal...not sure if 8-10 grams would make that much difference.

So, let me ask...does the clock with 10 BPM keep time? By all accounts, it should be way too fast since it does an extra 2 beats per minute.

If the 0.003" spring doesn't work, sounds like there's something not right and you'll need a thinner spring. Springs can be manually thinned but you have a long way to go to thin it. Probably better to get something thinner...maybe around 0.0025 or 0.0027".

Kurt

 

[PetitLuc]

Hmmm...the bronze spring suggests it is an original one, not the style that is currently available. Other versions of the S. Haller clock use a 0.0022" spring, but those springs are much less than 120 mm long, less than 100 mm per the repair guide. So, likely not for your clock if it looks like the images first shown in this thread.

Your weight is a bit less than nominal...not sure if 8-10 grams would make that much difference.

So, let me ask...does the clock with 10 BPM keep time? By all accounts, it should be way too fast since it does an extra 2 beats per minute.

If the 0.003" spring doesn't work, sounds like there's something not right and you'll need a thinner spring. Springs can be manually thinned but you have a long way to go to thin it. Probably better to get something thinner...maybe around 0.0025 or 0.0027".

Kurt

Yes it is too fast!
I'll order a thinner spring. Thank You for the suggestions.

 

[Dells]

Make sure it it fluttering.

 

[PetitLuc]

Make sure it it fluttering.

It is not fluttering.
I ordered a thinner spring from a different supplier, unfortunately, it is thinner, but of a lower width:
1st Replacement spring was 0.6mm width, second is 0.4. I'm unable to regulate the later.